Making Moving Toys and Automata

48.06 MB·English

by  Robert Race

THE RADIOGRAM ANNUAL — 1937

DETAILS.

‘Secondary. Reaction.
2ometre band Stuns. § tures
‘eometre band s6 turn 2S tures
sometre bands 30 ture 10 turns

[All secondaries close wound with 26 D.C. wires.
‘All reaction cols love wound with 20 D.S.C.
‘This set ean also be uted for broadcast re-
ception. It will be necessary Yo use two colle
{fo cover the whole of the broadeast band.

THE RAMOB OUODYNE 2.

For those who want something a little more
ppowertul than the Duodyne described above, the
Buodyne 2 will Al! the bil, ‘The circuit is actu
Ally. the same as the Duodyne One with the
Addition of a transformer coupled audio stage.
2B dotted line has been placed through the cir-
cuit diagram indicating where the audio ampli
fier is to be added to the Duodyne. This Am-
Dlifer woes the latest. type of 10S Pentode.
‘The Ampliter portion of this set can be used
cn any battery set, either short wave or broad-
ast, which does not already employ an audio

stage and 0
ould be obtained. The Amplifier could also be
connected to. a. crystal set to increase the

‘Volume, and, in fact, a crystal set with 2 single
‘alve ampli very’ often makes 2 good local
{ation receive, and gives Sood room strength
fon the speaker.

PARTS LIST.

A-FOR THE AMPLIFIER.

“Torex Audio Transformer

‘Spin WB Socket

At Condenser

T'imia. Condenser

rt, Pushback Wire

1308 Raytheon Valve...
KIT OF PARTS

completo List of Parts 26 above—

‘Oat, No, FKSGI~25/~

FOR THE DUODYNE ONE.
PARTS LIST.

‘Metal Chassis and. Panel

Plussin Formers

02 Concourse Condenser

Saa00 ohm + Watt Resistors
‘megohm 1 Watt Resistors
{0 ohm Rheostat
Potentiometer with Switch

449 Valve ‘(haytheon)
Sundries, including Wires for coils, Ws,
‘pushcbacke, et. .

KIT OF PARTS COMPLETE.

Kit of Parte as above—Cat, No. FKSSs, £2/11/6
Kit of Parte a8 above, but with colts already

wound Cat. No, FRSS! aa
EXTRAS.

sie

‘ays

$80

READY-WOUND COILS.
ready wound can be purchased at 15/-

Set consists of 3 Coils

rox, 20/60/80 metres.

FOR THE OUODYNE Two.

‘The parts required for building the “TW
are complete sets of A and B, 28 listed above.
Complete Kit of Parts for Duodyne Two.

"eat. Ne. PKS : ss/se/6
ACCESSORIES EXTRA.

‘amp. Accumulator 86

"ie" Batteries usr

nes Be

Battery a

|

One

compliments of www.oldradios.co.nz

Six torch batteries will operat a
‘onsivalve receiver, The outstanding features in
‘clude low cost, simplicity of construction, space
harge aetector, and 00d DX. performance.
While this ttle set will be of interest to be.
inners graduating trom the crystal. stage of
radio, hikers, ‘trampers, ete, will find it an
‘cxtremely useful ttle set

smal batteries used, it
many 2 pack.

$5 cononsain swe se
Coy

Fst,

‘THE CIRCUIT ANO

|CTURE DIAGRAM.

Experimenters will find the space charge de-

tector of special Interest, and, a8 far as me are
aware, ‘this is the first time the principle has

‘i this set the type 49 valve is employed in
a regenerative circuit with resistor control of
Feganeration. A’ positive asin a applied to the
inner grid of the valve, thus permitting the
valve fo operate eMiciently on only 6 volts of
Plate voltage, The filament supply i 1} volts,
Which can be obtained by connecting, tw

{orn celle in parallel a9. shown or 3
No. 6 type dry ‘cell may be used. Four single
‘torch celle connected in series furnish the bias
‘and plate voltage or Swwolt © battery could be
‘sea a8. the 8 supply.

‘eilewinding detail are shown in Fig. 1 It
fs important. that all three windings be made
in a clockwise direction and connections should
bbe made as shown. The start and finish ends
ff each coll winding are anchored By passing
‘the wire through {wo small holes bn the former.
Be sure and leave the wires tong ‘enough to
each the various points as indieated in Dia-
fram 2. All the components are mounted on 2

wood base Gin. x Gin. x jin, and should be
placed as shown in the diagram.
‘when the wiring hat Deen completed and

‘reduce the plate volta
The set will not operate properly. in Tuning
the regeneration control fs advanced until 2
Soft ‘hod i heard, now back off the controt
‘Somly “until oscillation ceases. Stations are
then tuned in By rotating the knob in the varie
ble condenser. slight readjustment of the
generation control may be necessary in order
fo ebtain maximum volume. The set ts most
Sensitive at the point Just before oscillation
begins.

‘Looking at the diagram showing the layout
of the components Ht will be. seen that an
xtra. term sd for supplying the inn
frid_ voltage. This is done so. that_a_ high
Yoltage may be used on the plate than the
10 derived. The plate voltage which goes
‘hrovgn the Readphones Yo the plate of the
waive may be increased to 12 volts with a
‘ligne inoreate in volume.; however, the rid
iar should remain at 6 volts.

LIST OF PARTS.

1 Telson .t003 Condenser.
2 toot Fixed Condensers.

PICTURE SHOWS WIRING.
96

THE LAMPHOUSE ANNUAL—1938

Hikers’ “49” Amplifier.

compliments of www.oldradios.co.nz

Here is a one-tubo amptifer which can be
used to pep up the volume from your “Hiker’s
‘One’ or ‘Crystal Set. It uses the 9 type tube

‘2 space-charge circuit operating on 1i-volt
“A eupply, and only 15 volte “B supply, and
will operate a small sensitive magnetic speaker
i you nave “local” station close handy.

mount the components in position
as shown in tho (iagram) (picture). The two
fmput clips onthe left of the baseboard are
‘wired to. the HT- and P terminals on the
{Transformer respectively. Another wire connects
‘transformer terminal @ to lug marked CAT
fom the valve base. Then connect. terminal F
fr GB to filament (F) lug on valve base, which
{s noxt to CAT lug, and carry the wire on (0
‘A—"clip on baseboard. A} clip goes to. the
ther lament tg on valve socket. —G Ivf go
{o one speaker clip on baseboard, and the wire
‘then carries on to. the lip. marked B15
volts. Tho last wire connects. the other loud
Speaker clip to valve lug marked A or P.
"There are one or two points to note regarding
‘the operation of this amplifier. When connect:
Ing up to tho “Hiker's One” make sure that
the input’ terminal which ie wired to HT oF
B-L on the transformer connects to the phone
terminal on tho “Hikor's” which ie connected
to the /-B terminal on that set. The other
input clip, which is wired to the P terminal on
‘he transformer connects to the other phone
terminal which you will notice is wired to. the
‘oil and cantre contact on the potentiometer
‘Connect A— and A+ clips t0 A and A+
clipe on the Hiker’s One. Let us remind. you
hhere that i will be necessary to disconnect the

A ead when the sot is not in use as the
witch on the Hiker's only controls the current
{to its own valve. No clip Is provided for 8,
a6 this will be an external connection to. BA
fon Hiker's, Le., if a separate 6 to 9 volt bat.
Tory is used, its goes to clip marked B-L15
volts and its — goes to Bon the Hikers
If a single ts.volt battery is to be used to
supply. both sets, a lend is taken trom this
battery's tSvolt tap to B-15 clip on amplifier
When used in conjunetion with crystal set,
the input terminals are connected to the phone
terminals on the crystal set and the “"B” hate
tery — lead ig then connected tothe Aon

| RESISTANCES.

To obtain special values Revistances can be

| connected together in serice or parallel as
| Connected in series —
| Total Resistance — ry ob ry + ry

RI

Resistors in Series.

Connected in para

Total Resietance —

‘Total Resistance — 2

RI

RQ
Resistors in. Parallel.
Example 1

im series with a 2,000 ohm resistor,
‘the tofat resistance?

A 4,000 ohm resistor is connected
‘What Is

Resistors in series — ft R, then the total
resistance is 3,000 ohms.

Example 2—A 1,000 ohm resistor is connected

| im parattel with a’ 2,000 ohm resistor.
| what is the resultant resistance?
RXR
Resistance in parallel — =
1000 x 2000
‘000 2,000
Therefore "the total resistance is 66.666
onme.
sa
Napier, 28/8/37
1 am very pleased with the perform
| | ance'‘ot ‘the “atikers One.” The fol
Towing. are the results: 1¥A, 4YA, 22h

2B, 2¥C, 3YA, 22H, 22L. The latter
three 1 received On good speaker
strength. Could any Rahob give me any
Feason why I cannot receive 2¥A, Wel.
ington. 1 have also received’ 20F,
Syainey. It came in ae loud as some
Of the Nz. Stations.
Rahob No. 2340.

LAMPHOUSE GUARANTEE.

“Any goods that are in any way une
suitable may he returned within seven
days (trom receipt) and your monty
willbe refunded in

Sie.
| PARTS FOR MIKER'S AMPLIFIER. (4

Daseboard

£ Fahatok ips. BATTERIES.

1 pin Botetonrd Valve Base, {volt Vidor “e" Battery.

1 Rio Transform Hisott Vidor No. #eal’Gr necessary),

7 fin x GBA" Wood’ Sorews.

2 jin SBA Wood screws,

2 lin. son "Wood ‘Screws COMPLETE KIT OF PARTS — without

‘tin, Hookup Wire atten

vane tats No. EK31 20/-
94

THE LAMPHOUSE ANNUAL—1938

The Improved “Hiker’s One”

The Hiker’s One Set, which we descrined in
‘our last Annual, proves to be one of the most
jpular of our Kit Sets. Hundreds of these
Hittle “Battery Misers" are. in use every day
all over New Zealand, in cities and bush cour
{ries and in hackblocks whore power” is not

fable, and the average battery receiver ex:
pensive to run.

of the set, mark these clips from left to right
as follows: Bt av. = Bf ty. — B—
Ry = A = = A. Screw down the valve
‘socket behind the condenser, the two flament
pins being at the back of the set. Now the
coil, Tt is essential that a neat job be made

| of this, otherwise tuning will Re erratic. and
oscillation awkward to avotd. All three windines

THE IMPROVED

1t was originally described to run off torch
‘andthe components used were such 38
{to cut down the weight az much as. possible
‘The set was then used hy hikers, tampers, and
others, who have carried their Hiker's One trom
fone end of New Zealand to the other
We recommend using the batteries listed for
more satisfactory operation and. ife-lasting
‘economy. In country districts (away from
powerful “loca” stations) reception of all_the

YA station will come in during daylight even
‘and all this without the need of 2
‘expensive B battery.
‘CONSTRUCTION.
We advise you to purchase your kit complete
—odd used parts BO NOT sive efficient opera:
ton. First, cerew the panel to the baseboard.
‘Then slide the condenser up to the panel and
‘mark ‘the position forthe hole to take the
shaft. Now mark another hole on the opposite
‘side of the panel in the same relative position
for the potentiometer. Make both of, theve
holes large enough to tako the threaded bush
‘on the condenser and potentiometer. You ean
‘Row mount these two, fastening to the panel by
‘means of the muts—then mount the two termi
als for the phones, making sure that the one
rearest. the tuning’ condenser does not touch
the condenser trame. This finishes the panel
Next mount the seven fahenstock clips along
the back of the baseboard. by meane of the
4m. wood screws provided. Looking at the back

“HIKER'S ONE.”

MUST be in the same direction and spaced kin.
apart. “Make a small hore din. away from one
| end on the former and pass the wire through
| this twice, looping it the last time and leaving
anout sin. to connect up to the A clin om the
| set afterwards.” Wind oh oloesly and neatly 35
{urns, finishing the end off by passing the wire
| trough ‘two small holes inthe former spaced
about tin. apart, and leaving about tin. wire
for connacting up; Sin. below this winding make
‘wo more small holes and commence the next

winding of 100 turns, finishing off the same as
{he frst winding. “The third winding fe put on
in the same way din. below the second wind.
ing, and has 40'turne. "You should have now
about Jin. former lett below this winding, to
‘which the coil feet are now attached. Do not
‘mount the coil yet, but commence the wiring.
[All Joints should "be solderedand "not with
Hiquid solder or spirits fux—use resin core solder
for a ood electrical joint and make sure. that
parte to bo soldered are GLEAN, preferably
| Sanc-papered clean. The following’ wiring list

will be found helpful. AML wires should De taid
flat on the board and be short. Neatness here
will count a tot.

Wire from the A clip to one side of switeh
‘on potentiometer. Wire trom other side of
‘switen on pot. to F— (next to. A) on valve
socket,

Wire trom centre contact on pot. to nearest
‘phone terminal. Wire trom top of third. wind-
ing on coll, also to centre contact on pot.

‘One side of .0b01 miea condenser to frame of
tuning) condenser—Cthe coil should now be
mounted) — and the other side also to
entre contact of pot. Wire other phone ter-
‘minal to clip marked B= sv. Wire, Gon
valve socket to clip marked Bi tiv. Wire
{rom tuning condenser frame to. remaining F
terminal on valve socket and on to clip marked
8, and on to Art, and thence on to E,
Bottom of frst coil and hottom of second coi!
algo t0 clip marked E.

Bottom of ‘third coil to A on valve socket:
Wire trom teft lug on pot, also to A on valve
socket. Note that right lug on pot. ie not
Used. “Top of frst coll to clip marked A. Top
(of second colt to fixed plate terminal on tuning
condenser.

Place resistor and remaining .0001 condenser
side by side, and twist together the pigtails of
‘these and run the soldering Iron along. them.
Connect one side of this combination to CAT
on valve socket.

‘connect other
tuning. conden

‘The wiring ts now finished, a) but the check-
Ing. Ht is important to earsfully check the wir:
ing, as a mistake might mean burning out the
valve.” “Put the knobs "on the two. shafts
rotruding from the front of the panel,
land connect the phonos to the phone. terminals,
Now connect the aerial Gwhich must be a. 200d
fone), and the earth (which algo must be good)
10 the clips marked A and E respectively.

ide 10 fixed plate terminal on

‘Clip A — goes to side terminal or wire on
No. 6 cell

| Clip A+ goes to the centre terminal on No.

| “een

Clip BE goes to the —9 socket on the ¢
hattery

Clip B + 14 goes to the — 75 socket on the
© nattory.
©. Battery.

¥. Koes to the + socket on the

‘en

bk.

IMPROVED

compliments of www.oldradios.co.nz

— 4

Five cs
=

5
Teles |
Fad |

| —_.,
THE LAMPHOUSE ANNUAL—1938

95

compliments of www.oldradios.co.nz

VIEW FROM ANOTHER ANGLE.

“The last three connections might seem wrong,
hut you must remember aC battery is usually
lused for giving negative bias to. valves, and
‘oneequently marked with one -! socket and
‘tapped —— sockets. Actually the — 9 soaket
gives us — Ov; the — Tf socket

iv. and the F0v. socket gives us + ov.
operation it might be found necessary to in-
crease 8 +} 1] t0 Ov. or 4iv., 10 obtain satis.
{actory oscillation, "It this is so move the
connection from — Tv. socket to 5 or — 4b
sockets.

OPERATION.

‘Turn the volume contro! clockwise untit a
plop in heard in the phones. This plop indi-
fates oscillation. Now rotate the tuning con-
Genser until a whistle is heard. Turn back the
Volume contro! until the whistle just dlisap-
pears. Slight retuning will now bring in your
Station. ‘The set is most seneitive atthe
point just before oscillation begins, but stations
Aare more easily located just past the oseillation
point. If desired, the baseboard and parcel could
be stained —botore assembling, of course. In
‘conclusion, Tet us wish you 365 days and nights
of good reception, with all the other “Radio
listeners on their “Hiker's One,

PARTS LIST IMPROVED “HIKER'S

one.”

2.0001 Mica Fixed Condenser.

1 iomeg, Carbon Resistor.

4.00035 Tuning. Condenser.

4 lemeg. Potentiometer, with switch,

17 Fahenstock Clips.

2 Terminals.

1 Spin baseboard type Valve Socket.

1 12in, Coil Former

1 0%, approx) gauge 32 Enamelied Copper

2 coil Feet. |
1 Type 49 Valve (Raytheor-Radiotron). |
3 OBA x Lin RLM. Screws.

5 OBA x Jin, RH. Screws

268A x Yin. Bolts with Nuts, RH.
1 Goll Hookup Wire.
1 Baseboard.
1 Panel
2 Pointer Knobs.
BATTERIES.
1 2iv. Cotumbla, No. 6 Cel.
1ov. © Battery.

3 Wander Pugs” for above.

BUY A
COMPLETE KIT FOR THE
IMPROVED
“HIKER’S ONE”

wo
COMPLETE KIT—With batteries,

eat, No. EK2S 33/-

COMPLETE KIT—Without batteries

cat. No. EK29 2876

Dunedin, N.W.ty 15/10/37

L uilt the “HIKER'S ONE? over the weak:
fend from the instructions in the Catalogue and
‘obtained wonderful results, getting all the main
New Zealand and Australian tations.""~A.T-S,

Nelson, 11/10/37
“A number of my friends have heard. the
“HIKER'S ONE,” and think it is marvellous,
50 1 am trying to porssuade them to get one.
have had J.0.A.K., Tokio, Japan, twice
now about RG, besides about § Australian and
5) New Zealanders. were’ on speaker and good
strength.

E.m., Rahob 2016.

The Hiker’s One

«wo
‘This is the circuit” of the original “Miker's
fone,” which was ‘described in the 1937 Lamp-

rouse Annual. Anyone preferring to make up
this circuit can still obtain Kits of Parts a5
{ollows

Jour peu rreuc neue |

Sua Shae

cat. Wo, en
EKGs compte Kit of Parts, without “iat
ina Ba
xstsncompine Kit of Party ath torch
etn oe
sxsast— comps ui or Paty wit” svete
wattey and tat yet a

1

What Users Say!

Pukehow, Hawkes Bay, 21/10/37.
“1 wish to congratulate. you on ‘designing 2
set like the “HIKER'S ONE." I have built-up

the set and am more than pleased with its
performance. I have logged 27 stations #0 far,
6 of these being Australian stations. 1 wish
2'50 to. thank you for the prompt attention
Wwhion my Ist order was shown.” -D.R.P.

The “HIKER'S ONE’ purdvased from you
some time ago. is going wonderful. It is a

reat little set." E,W. Wt.
Te Kauwhata, 13/9/37.
think the ‘HIKER'S ONE

little set, as I have logged 17
tions on it!"—JS

Frankton Junction.
am very satisfied with the
‘set I bought a few

land can recommend it as a sot well worth
‘making. So far 1 have received fourteen NZ.
Stations and four Auctrallan stations. 1 have
Increased. the plate voltage to 15 volts, The
goods arrived in good condition.’—D.F.

R.0., Te Kauwhata.

“1 received the "HIKER'S ONE” on Friday
land am more than pleased with it. 1 have an
Aerial about 50 fect long running above. the
telling and about two feet Delow an iron root.
So far Ihave received about twelve stations
at good strength, including 8¥A and 2¥C. 1YA
is too loud to’ listen to at full volume.”—
es
THE

LAMPHOUSE ANNUAL—1939

129

“HIKER'S ONE"
Questions we are asked

THE NAME.—Originally the “Hiker’s One”
was designed for hikers, trampers, ete, It was
‘made very compact and operated from torch
batteries, so that the whole outht would be
very light hence the ame “Hiker’s One.” The
set’ was found to fill a long-felt’ want for 2
small set, economical to operate and 10 give
stant reception. It was, therefore, redesigned
on a larger hase and with heavier batteries,
and the “Improved Hiker's One" was orn,

BATTERIES.—This oot operates trom a single
Hievolt No. 6 cell for lighting the Blament and
4 Svolt battery for the high tension. The total
fost of the batteries is 6/-, and thoy will last
from two to six months, according to. the
amount of use. A 2volt accumulator can be
Used in place of the No. 6 cell and any tapped

'B” battery in place of the Salt battery.

AERIAL AND EARTH.—It is essential that
4 good aerial and earth are used—remember
you are only using one valve and low battery
voltage. Give your.set a fair chance by using
2 good aerial,

LICENSE.—It is necessary to obtain a license
for this radio set just the same ax you woud
tor any other set. However, st you have already
got a set It ls not necessary to. get an add
‘onal Hieense. "Briety, the rule ts "One license
for each tamily in each house.

PHONES OR SPEAKER.—A common question
is: “Can 1 use a speaker with my "Hikers
‘One'2""” Yes, provided you can obtain enough
volume to operate it. This sot ie designed for
use with headphones, and we cannot guarantee
speaker reception. Many usere near powerful
broadcast stations and in favourable localities
for reception obtain speaker volume, but this
should be regarded more as the except
than the rule.

Extra volume to work a speaker
stations can he obtained by adding an
4s decerined on this page.

CAN | GET AUSTRALIAN STATIONS?—This
also depends on local conditions, ete, Hundred
‘of users here sent in long liste of Australian
Stations and even further afield. The set is sold
8 a local station receiver, and you should have
‘no difficulty in logging several of the main YA
Stations. Whether’ you will be able to log the
stations, the 2 Commercials, and overseas
stations will’ depend onthe care taken in as.
Sembling "the set, local conditions, and. the
ficiency of the acrial and earth systems.

| HAVE NOT HAD MUCH EXPERIENCE IN
SET CONSTRUCTION; CAN 1 ASSEMBLE THE
SHIKER'S ONE"?—Thie depends on how useful
you are with your mind and hands. We suggest
Ghat you carefully read over the instructions
(see page 127 “Lamphouse Annual"), and then
Yyou should be able to decide for yourself whe-
{thor you are capable of putting it together or
pot.

CAN 1 BUY THE “HIKER'S ONE” AL.
READY ASSEMBLED AND TESTED? — Yes.
‘The extra charge for assembling and testing
i 9/8.

IN THE EVENT OF MY BUILOING THE
SET AND NOT GEING ABLE TO MAKE IT
G0, WILL YOU ADJUST IT FOR MET—Yes.
‘There will be no charge for cheoking over your
Work and making minor alterations. Where it
Nie ohms toa distor da,
charge is 5/6.

LAMPHOUSE GUARANTEE.
ny goods that are in any way

ssitatle ‘may oe returned wth seven |
Shaye Grom’ reaipt) and Jour’ money |
wail refund |

Hikers’ “49” Am plifier.

compliments of www. aR

5.CO.NZ

This Ampliner witt pep up the volume trom
your crystal set or Hiker’e eet or short-wave
Hiker's sufficiently to work a loudspeaker, pro:
vided, of course, you have good headpnone
Strength to start with, It uses the type 49
‘ube with only 1S volts “B" supply. Firet of
all, mount the components as shown in the pic-
‘ture. ‘The two input terminals on the loft of
the baseboard are wired to the H.T. and P.
terminals of the transformer respectively
‘Another wire connects the transformer terminal
‘marked G to G on valve socket. Then connect
‘transformer terminal marked GB or F to Fon
valve socket, and then on to A— clip on base.
hoard... A+ clip goes to the other Slament lug
fon valve socket. CAT lug on valve socket goes
{0 one speaker clip on the baseboard the wire
‘then carrying on to the B +15 clip. We then
‘connect the other loudspeaker clip to the A or
P lug on the valve sooket,

‘There are one or two points to note regarding
the operation of this ampliner. When connect:
ing up to the Hiker's set make sure that the
input terminal, which fe wired to HT or B=
fon the transtormer connects to the phone ter-
minal on the Hikor's which is connected to the
B+. of that set. The other input clip, which
Js wired to the P terminal on the transformer,
Connects to the other phone. terminal om the
Hiker's, which you will notige is the one. that
|s wired to the coll and centre contact of ‘the
potentiometer. Connect amplifier A+} and A
Clips to A+ and A~ clipe on the Hiker’. Let
lus remind you here that it will be necessary
‘to disconnect the A lead when the amplifer

ls not in use, as tne switen on the Hiker’s only
controls the ‘current to ite own valve, No clip
| provided for B—, as thie will be an external
‘connection to B-+ max. on Hiker's set. If 2
Separate 6 or § volt additional hattery is used
with the ampliier, its + goes to B 15 volte
fon amplifier, and its — goes to B +9 volts on
Hikers. Ifa single 18 volt battery is used
connections are as follows: —
15 goes to Hiker's B
301 goes to Hiker’s & “+ 4p
<6 goes to Hiker's Bos
anon 820,18 ampliter B18
en used in conjunction with a erystat set,
the B — goes to the A: terminal on the an

plier. If desired, thie ampliter could be b
fn the same hase as the Hiker's set itself,
making a compact twovalve set.” if this ts

| done, wire the filament uss of both sockets
together,

Napier.

1 am very pleased with the perform.
ance of the “Hikers One.” The. fol.
lowing are the results: 1VA, SYA, 22P,
BB, 2¥G, SYA, 22H, 221. ' The latter
three 1" received on good speaker
Strength, Could any Rahob give me any
reason why I cannot receive 2¥A, Wol-
| | ington. "1 ave also. received 20F,
| Sydney. It came in as loud a8 come

of the NZ. stations,
Rahob No, 2300, |

PARTS FOR HIKER'S AMPLIFIER,

Baseboard
1 Fahnstock Clipe
1 Spin Baseboard Valve Base,
1 Audio Transformer.
7 din, x SBA Wood Screws,
2 fin. x GBA Wood Serows.
2 din, x 6BA Wood Serows.
| “isin, ‘Hookup Wire.
[fan

co)

BATTERIES,
1Sv0lt Vidor “c” Battery.
ifvolt Vidor No. ¢ Cell Gf necessary).

COMPLETE KIT OF PARTS — without
pattertes,
Gat. Nos AKSY seve, 2O/~
THE LAMPHOUSE ANNUAL—1939

127

compliments of www. oldradios.co.nz

The Improved “Hiker’s One” |

We spent a considerable amount of time trying to improve the Hiker’s

for this year's

‘Annual,” but without success,

It is hard to admit

defeat,, but it really shows how good this set is as it stands. Some may

like te build both the “Hiker's”

and its Amplifier together.

If the

components are carefully spaced there is room on the one baseboard

to do this, Before conti

wing with the

structions, we would like to

‘mention that the only failures have been entirely due to bad and untidy

workmanship.
success will be yours.

‘The Hikers Ono Set, whion we described in
our 1957 Annual, proved to be one of the most
Popular of our Kit Sets.” Hundreds ofthese
Tittle “wattery misers are in woe every ay
all over Now Zealand, in eities and. bush coure
{ries and in backblocks where power fe not
available, and the average battery receiver ex
ensive to run

We was originally described to run off torch

Be neat, particularly with the coil and soldering, and

holes large enough to take the threaded bush
fon the condenser and potentiometer. You can
‘Row mount those two, fastening to the pane! by
‘means of the nutethen mount the two. term
fale for the phones, making sure that the one
‘nearest. the tuning condenser does not touch
the’ condenser frame. This finishes the panel.
Next mount the seven fahenstock clips slong
the back of the baseboard by meant of the

THE IMPROVED “HIKER'S ONE.”

lls, and the components used were such as
{fo cut down the weight as. much as possible
‘The set was then used by hikers, trampers, and
others, who have carried their Hiker's One trom
fone end of New Zealand to. tho ether.

"We recommend using the batteries listed for
ore satisfactory operation and Htelasting
economy. "tn country districts (away trom
powerful “local” stations) roception of all the
‘main New Zealand stations and many Australian
fan be had in tho evenings, whilst your nearest
YA station will come in during daylight even in
summers and all this without the need of
large and expensive © ‘battery.

construction.

We advise you to purchase your Kit complete
odd used parts DO NOT sive effcient ‘opera:
ton. First, serew the panel to the baseboard,
Then slide the condenser up to the panel and
mark “the position for the hole. to take the
shaft. ‘Now mark another hole on the opposite
Sido of the 818 position

Make oth “of these

in, wood serews provided. Looking at the back

{oF the cot, mark theso clips from left to right
4s follows:B oy, = By diye —
Rim R= EA. Screw down
Socket behind the condenser, the two
pins being at the back of the set. Now the
foil, Ttis essential that a neat job be made
(ef ‘this, otherwise tuning will be’ erratic and
pon three windings
and spaced Ain.
‘trom one
‘hroush

fd’ on the former and pass. the
this twice, looping it the lat time and Teaving
anout in. to connect up to the A clip on the
fet afterwards, Wind on closely and neatly. 36
urns, Srishing the end off by passing the wire
throusdh two small holes in tho former spaced
‘anout Bin. apart, and leaving about tin. wire
for connecting up; Xin. below this winding make
‘two more small holes and commence the next
winding of 100 turné, finishing of the same as
the Arst ‘winding, “The third winding is put on
Jn the same way in. bolow the second wind
Ing, and as 40 turns. You should have now
Tett below ‘this winding, to
i are now attached. Do’ not
‘mount tho colt yet, hut commence the wiring
AAI! Joints should be soldered and. not. with
liquid solder oF spi
tor a good electrical,
parts to be sldered
and:-papered. clean.
‘will be found help
flat on the board and be short
‘Wire from the A— clip to one side of suite
‘on potentiometer. Wire trom other side of
switch on pot. to F (next {0 A) on valve
socket,

Al wires should be laid

Teatnese here

from centre contact on pot. to nearest
‘phone terminal.” Wire trom top of third wind
Jing om coil, also to centre contact on pot

‘One side of .o001 mica condenser to tramé of
tuning” condenser—<ihe coil should now be
mounted) — and the other also to
centre contact of pot. Wire other phone ter.
‘minal to" clip marked Gay." Wire Gon
valve socket to clip marked Bi tiv. Wire
‘rom tuning condenser frame. to remaining
‘terminal on valve sookat and on to clip marked

and on to A-r, and thence on {0 E,
Bottom of frst coil and hottom of second coil
algo t0 olip marked E.

Bottom of third coli to A on valve socket.
Wire from left lg on pot. also to A on valve
socket. Note that right tug on pot. is not
Used. “Top of frst coil to clip marked A.” Top
(of stcond cit to fixed plate terminal on tuning
condenser.

Pace resistor and remaining .0001 condenser
side by side, and twist together the pigtails of
‘these and run the soldering iron along. them.
Connect one side of this combination to CAT
fon valve socket,

Gonnect other side to fixed plate terminal on
tuning condenser.

A
5

Reo MY

© Be

4
re
IMPROVED “HIKER'S ONE” cineutT.

cou
THE LAMPHOUSE ANNUAL—1939

127

compliments of www. oldradios.co.nz

The Improved “Hiker’s One” |

We spent a considerable amount of time trying to improve the Hiker’s

for this year's

‘Annual,” but without success,

It is hard to admit

defeat,, but it really shows how good this set is as it stands. Some may

like te build both the “Hiker's”

and its Amplifier together.

If the

components are carefully spaced there is room on the one baseboard

to do this, Before conti

wing with the

structions, we would like to

‘mention that the only failures have been entirely due to bad and untidy

workmanship.
success will be yours.

‘The Hikers Ono Set, whion we described in
our 1957 Annual, proved to be one of the most
Popular of our Kit Sets.” Hundreds ofthese
Tittle “wattery misers are in woe every ay
all over Now Zealand, in eities and. bush coure
{ries and in backblocks where power fe not
available, and the average battery receiver ex
ensive to run

We was originally described to run off torch

Be neat, particularly with the coil and soldering, and

holes large enough to take the threaded bush
fon the condenser and potentiometer. You can
‘Row mount those two, fastening to the pane! by
‘means of the nutethen mount the two. term
fale for the phones, making sure that the one
‘nearest. the tuning condenser does not touch
the’ condenser frame. This finishes the panel.
Next mount the seven fahenstock clips slong
the back of the baseboard by meant of the

THE IMPROVED “HIKER'S ONE.”

lls, and the components used were such as
{fo cut down the weight as. much as possible
‘The set was then used by hikers, trampers, and
others, who have carried their Hiker's One trom
fone end of New Zealand to. tho ether.

"We recommend using the batteries listed for
ore satisfactory operation and Htelasting
economy. "tn country districts (away trom
powerful “local” stations) roception of all the
‘main New Zealand stations and many Australian
fan be had in tho evenings, whilst your nearest
YA station will come in during daylight even in
summers and all this without the need of
large and expensive © ‘battery.

construction.

We advise you to purchase your Kit complete
odd used parts DO NOT sive effcient ‘opera:
ton. First, serew the panel to the baseboard,
Then slide the condenser up to the panel and
mark “the position for the hole. to take the
shaft. ‘Now mark another hole on the opposite
Sido of the 818 position

Make oth “of these

in, wood serews provided. Looking at the back

{oF the cot, mark theso clips from left to right
4s follows:B oy, = By diye —
Rim R= EA. Screw down
Socket behind the condenser, the two
pins being at the back of the set. Now the
foil, Ttis essential that a neat job be made
(ef ‘this, otherwise tuning will be’ erratic and
pon three windings
and spaced Ain.
‘trom one
‘hroush

fd’ on the former and pass. the
this twice, looping it the lat time and Teaving
anout in. to connect up to the A clip on the
fet afterwards, Wind on closely and neatly. 36
urns, Srishing the end off by passing the wire
throusdh two small holes in tho former spaced
‘anout Bin. apart, and leaving about tin. wire
for connecting up; Xin. below this winding make
‘two more small holes and commence the next
winding of 100 turné, finishing of the same as
the Arst ‘winding, “The third winding is put on
Jn the same way in. bolow the second wind
Ing, and as 40 turns. You should have now
Tett below ‘this winding, to
i are now attached. Do’ not
‘mount tho colt yet, hut commence the wiring
AAI! Joints should be soldered and. not. with
liquid solder oF spi
tor a good electrical,
parts to be sldered
and:-papered. clean.
‘will be found help
flat on the board and be short
‘Wire from the A— clip to one side of suite
‘on potentiometer. Wire trom other side of
switch on pot. to F (next {0 A) on valve
socket,

Al wires should be laid

Teatnese here

from centre contact on pot. to nearest
‘phone terminal.” Wire trom top of third wind
Jing om coil, also to centre contact on pot

‘One side of .o001 mica condenser to tramé of
tuning” condenser—<ihe coil should now be
mounted) — and the other also to
centre contact of pot. Wire other phone ter.
‘minal to" clip marked Gay." Wire Gon
valve socket to clip marked Bi tiv. Wire
‘rom tuning condenser frame. to remaining
‘terminal on valve sookat and on to clip marked

and on to A-r, and thence on {0 E,
Bottom of frst coil and hottom of second coil
algo t0 olip marked E.

Bottom of third coli to A on valve socket.
Wire from left lg on pot. also to A on valve
socket. Note that right tug on pot. is not
Used. “Top of frst coil to clip marked A.” Top
(of stcond cit to fixed plate terminal on tuning
condenser.

Pace resistor and remaining .0001 condenser
side by side, and twist together the pigtails of
‘these and run the soldering iron along. them.
Connect one side of this combination to CAT
fon valve socket,

Gonnect other side to fixed plate terminal on
tuning condenser.

A
5

Reo MY

© Be

4
re
IMPROVED “HIKER'S ONE” cineutT.

cou
128

‘The wiring fe now finshed, all but the checks
ing. It ie Important to carefully check the wire
ing, a9 a mistake might mean burning out the
valve.” Put. the knobs on the two. shafts
protruding from the front of the panel,
and conneot the phones to the phone terminals.
Now connect the aerial (which must be a good
fone), and the earth which also must be good)
‘to the clips marked A and E respective

‘clip A — goes t0 side. terminal or wire on
No. 6 etl

‘Clip A+ goes to the centre terminal on No.

lip B— goes to the —9 socket on tne ©
battery.

Clip B + 1} goes to the — 7 socket on the

ov, goes to the + socket on the

‘The last three connections might seem wrong,
but you mast remember aC battery is usual
used for givicg negative bias to valves, and
consequently marked with one socket and
tapped — sockets. Actually the — 9 sooket
fives us —Ov-; the — 7 socket gives us +
vs, and the "Ov. socket gives us -b 8¥- In
ion it might be found necessary to in-
, to obtain satis-

socket

OPERATION.
‘Turn the volume controt clockwise until a
"Thie plop indi-

f desired, the baseboard and panel could
1ed—before assembling, of course.

Tet us wish you 365 days and nights
ception, with all the other Radio
their “Hiker's One."

PARTS LIST IMPROVED “HIKER'S
ONE.”

1.00035 Tuning. Condenser.

1 meg. Potentiometer, with switch.

2 Terminal.
{cpm baseboard type Valve Socket. |
t ilim, ai Former,

"0m porn) snes 8 Enameled Copper |

2 Goil Feet.
1 Type 49 Valve (Raytheon:
968A x fin. RLM. Screws.
56BA x Jin, RH, Screws.
268A x Yin. olis with Nuts, RAM.
1 Goll Hookup Wire.
1 Baseboard.
4 Panel.
2 Pointer Knobs.

BATTERIES.

113v, Columbia, No. § Cell
tov. © Battery.
3 Wander Plugs for abov

| COMPLETE KIT FOR THE
i IMPROVED
“HIKER’S ONE”

THE LAMPHOUSE ANNUAL—1939

comipliments of www.oldradios.co.nz

VIEW FROM

ANOTHER ANGLE.

|

[A MARVELLOUS GIFT!
THE FAMOUS, HIKER’S ONE.
ASSEMBLED AND IN CABINET.

the enthusiasm with which th
The newest HIKER’S

Just ion
ie will be received.

GNEy famous throughout the Dominion as
the lost wonderful and economical tittle
feceiver ever offered to the public. Used

By Hikers, Trampers, Scouts, Motorists, and
in hundreds ‘of homes as an extra ‘set for

the boys You just couldn't think of 3
more useful git!
Cat. No, AK252 — Complete with Valve

Sad Batteries
(EARPHONES EXTRA)

Lee,
The Hiker’s One
re |
ont Se alee cee ee wc oe
tere o mane
ee re ee 2 oe |
fdas

£2/11/-

Fo2 shvaear he

[stn Wenerce

Foun ve NPE U asc
ARE SRR Foe eer

'AKSES—Completo Kit of Parts, without bat-

25).
AKSSSA—Complete Kit of Parts, with toreh
Datteriog se. ‘ ars
AKSESE— Kit of Parts, with’ evatt

Dattery and t-volt dry cell. 26

| Dunedin, N.W.t.

over the week
inetructions in the Catalogue
fand obtained wonderful results, getting all
‘the main NZ. and Australian’ stations.”"—
ATS.
1E

LAMPHOUSE ANNUAL—194i.

12]

The Hiker’s Lunch Bag

compliments of www.oldradios.co.nz

One

7 Phones
QesvensO 9 Te
Pe ae Pet.
8 3
I. ma Ot CVC
gl a Ll
Si 8 = 3k & H|.8 Phones.
; OF fhe :
2 8 [2P hae cts. |
8 Je se | ae
ro —O neo
S| | egact :
¥e i Coit wound
3 o& | L Varound Chas.’
8 Grid Coil Space
= Ol Wound 15"24 DCC
ae fas} wire.
ea
2 ces Turns.
E22) a Pees ;
Ls Tickler Coil Close Wound 24 0.6.C.Wire
12 Turns.

At last! A really portable “Hikers One.” |
Completely self-contained—set, valve, batteries,
aerial and "phones all in a small lunch case.
This portable set will give you good head-
phone reception from your main local stations. |
Using the famous “Hikers One” cirenit in con- |
junction with the self-contained loop aerial,
this is the answer for a low-powered portable, |
Even in a steelframed building in Wellington
the “Hikers Lunch Bag One” continued to
bring im the locals at good ‘phone strength.

The coil is also the frame aerial, and is
wound around the outside of the wood chas-
sis on which the components are mounted.

We must first build the chassis frame, which
can be made from three-ply or thin box wood.
‘Measurements are given in the illustration.
‘The frame should be joined together by means
of screws. When completed give it about three |
coats of varnish or shellac, This is very im-
portant, as the moisture in the air may affect
the wood and cause loss in the coils.

‘The coils are now wonnd around the out-
side of the chassis. The grid coil is spac
wound (to cover 14 inches). The tickler
coil is close wound and spaced 3-16in. from
the grid coil. Both windings must be wound
in the same direction. The ends of the coils
can be fixed by the usual method of drilling
two small holes and passing the wire through,
Leave plenty of wire so that you will be able
to connect to the respective components. After
winding the coils, slip wooden matches under
the wires so as to raise the windings from |
the wood. Three matehes on each side and
two on each end, spaced evenly, will do nicely.

PARTS LIST.
.001 mica fixed condensers.
a carbon. resistor.
1 .0005 tuning condenser.
1 4 meg. potentiometer with switch. |
2 terminals,
1 S-pin baseboard type valve socket.
loz. (approx.) 24-gauge double
covered wire.
1 type 49 valve,
22 6B.A. x din, RH. screws.
1 coil hook-up wire. |
1 panel, three-ply wood, Gin. x 93in.
2 pieces of three-ply wood, 13
3 pieces of three-ply wood, 9
1 attache case, 14in, x 93in. x din,
1 bottle celluloid cement (for fixing
2 pointer knobs
Batteries: 1 1}-volt torch cell, 1 9-volt “C”
battery.
1 pair of "phones.

1 1 meg.

cotton

coils).

‘The next step is to fix the panel to the

frame and mount the ‘phone terminals, con-
denser and potentiometer into place. The
valve socket and clips for holding the bat-

teries should now be fixed to the inside of the
chassis frame. You can make the battery clips
from any old metal sheet, as their sole purpose
is to keep the batteries from slipping about.
Now wire up the components in accordance
with the eireuit diagram. | When finished,
check over all connections carefully.

OPERATION.

Advance yolume control to a point just
before oscillation, and then tune the condenser
until a station is heard. Then adjust volume
control for best results. Now rotate the whole
set until volume is at loudest point. ‘This op-
eration is necessary as most portable sets have
a definite directional tendeney.

Complete Kit of Parts for
Bag One,” including Valve.
Case, Cat. No. GK182

“Hikers Lunch
Batteries and

» £2/35/

(Phones extra.)

Christehureh,

“I have built the All-Wave Double Forty
ine, and have logged over 40 amateurs all
over New Zealand on 80 metre band, It is
an excellent set.""—L.N.

Hostel, Wanganui, 29/11/40.

Dear Sir,—Last week-end I went home to
Marton, where T live. I built the All Wave
Duplex Single during my stay at home, and
I am really thrilled with such a small set's
performance.

I bought a choke and two condensers from
you for it, and all are working well. The
cirenit was very simple indeed and took no
time at all to wire the set.

T used a plug-in Hikers’ One coil and an
eliminator for power supply. It is very easy
to tune in, and on the earphones I received
dozens of different stations. On a small
speaker I was able to listen’ to all the main
New Zealand stations very clearly.

During the Christmas holidays I am going
to add a 30 and 33 valve amplifier to it and
wind a set of short-wave coils, It is a really
wonderful set for its size. The packet of
resistors I bought from you for 3/6 have all
proved to be very good qualitiy. Sending you
another order next week, Yours faithfully,

M.S. (Rahob 3451)
150 {TE LAMPHOUSE_ANNUAI—1942 ‘TIE LAMPHOUSE ANNUAL—i9i2 iB
compliments of www.oldradios.co.nz .
SHORT WAVE HIKERS' THE HIKER'S TWO
(hy Syrah’)
ge Beats
Short Wave Hikers
Top Views
e “Poe
38
op
rXQ Ofn
Volve
ate A eet tac at
ae a a ae get Gl were aie cee me
seni Rare tea BM te eam, et is
igre ty oe ge by ere ea [be
Hedman Rite | BG mee eB Bint Hye Wes
fat ll present onciation The toni i. iey,le lag i tho ove wich combines the two celts pre
Siar ene rae iy ent? “See YP tp 8 at dan

‘renlay Sotweon each tend, Ie falas
ite Hg el oem
‘BES metces, aso che Bi to 80 mest col

es, aut now meek new ‘worlds dn 1 eis a ale Of a
without hace to" Guanes am tuk aasneed

ie Hifier's One tn Dougie Wo, fir vers Wile ithe sea at ace yee
Frain Ee
ve eapaticon, the Hes Tyo, wing uhdeent e chaie wails yeh