BSTJ 40: 6. November 1961: The TH Broadband Radio Transmitter and Receiver. (Sproul, P.T.; Griffiths, H.D.)

23.5 MB·English

The TH Broadband Radio ‘Transmitter
and Receiver

iy Bo SPROUT, aad HD. CRIFFIELS

A goscaldevrpion af the lt ave rian features othe THE
sa ren ing ‘poceting le? The paper demealee
Wo Boaottond radi rcezere et emaomslors si det, Sprtad anton
Sn ath mete fonnens he reser tut ei gerontu Aode
at ie waist preemption wh 2 nee fare of 10 di he LE mae
frmpifer Se wieder whys Rae hv einate the
Flipoetiter mk mma foe BME conseraion the yh re
Frente inalaor wong tor cade te ont enn 0) a
(Beutly the Sn teeing fe my

ig. 1 ip 0 eek gran af she LL radio river, The Saeaning
gl fom Ms antenna rogue ston ie dere. by cho dure
Sesion urteors, Actor fortes Alavi by the cannne! buries
Tie, oe gna, sapped to The wooizer motto, Hem i te mind
with s best uaeitsor (0) Frequeney dexived from cho rinnwsie ete
ier supply, 20 provice aw iso a Eee canter a PLL ase
“rhe I gna esis vt Ya lo ee prensa
tl by Me TF win acplier, Cer sural (vera

TP vrais ariliey provides about one hall oo Bap gir

of (eva nvacen, Sates tal yin ie avalabe, ce éelor-
tnived by the aneamatie sein rin <AOC) eens 0 fess Be
Fiver cetgu level ears er areal put egnel loves ging
fon 5a above to 2 is ow he normal, er sur stews, hee
tv ee, pd of sated ft sow in Eg. wl ven
tine preonplter and amr craifor oe honp dhe ACC ives’ pect

encore Ennion follows Oe TF cai amgplier. AM readin ae
‘Tavis equalianr mish vanes tga ae del den en

axoADNAND TRAMRTTER Joep NCH 1325

Ment ewtinsion for both the taster end seceiver of the set
‘viele slope reuszr fe inerted Fee the TF main amplier nd
the fuse eqalaes when rota tw ovret for dey slope distortion
‘nis has aecuivleedin several tepeners, Not ao on ig, 18
{aa-me jection ns) “les, omer! Letreenprourpier aa nin
fnplier ind ase nly ny uum 1 9 32 ead 18 or 285 hs fer
Forks euro frienicon of the acjaeat aniline ead ean
Tong the oreacaml haw

"ie nominal erowave sgl power <> she pn co tho chanel
Inuvdpane filter ig 25 dba and hens of tbe AP rain empliier
Soe ora eonatant level of approcineteie +14 duo. The ped atthe
reiviver anfpit ie chown give the proper power kaput atthe eon
essing equine

Te H0 frequrney’ of Dane for GHD! me) te wal dwell forthe
reciver faatont of channels 12 al 17 (or 22 and 27) Fer the chor
‘dhunvele a canner supply meillaior is mequbed as par of the radio
‘eovier, Thi mesa shifts the D1 ae fe HSN mc} by ether 27
sie or 8 me, Th eae euppy tr at the oul put ofthe mocacor
felets tho desir! BO freyieney Aker, chi filer dase wot. provie
Seeeamion to the secon hare oxtpat 12 kane frm Ue mode
Tecan wich wo fant ve sce of stenferent. "Te oe pate tes,
Following the earver apd Wer, eeumatas toes mse ep tn
‘ou Av alison fens to get the BD npr aves the yeosver
Doulas to the comets ae fa pine ee ig of che erytal

Thuloatins of ek of iol sme! oe welfnetin: ef equipment ae
rowdy the chanel mentor Heel. Thi cenit informe ths pro-
{ection evitehing ad alarm cies li che ipa sgpal falls to ap
reinely 22 dm

2 is phicngraph of the nlio moviee, The multiposiion switch
und the connector nately elo Hh a sd with nt extemal mee
Toveheck the eosin of He trv’ olecrom ees aul oder ile
the recive uae

a es

Moda wet HF Ponape

A phrase teosver madultor and TF preamp ie teu
i ig Ro the gave atin a itp rhe 22
foiven eh psi gts vio i magi, conse 32h
wad Graney, Lye reser nie i uf adn weaves

icureanTg fee T'doetutrntt weve vstoc ic SF at tse ot ase
t
|

ee

ig. 2 "ne Leal ao eer.
configuracon with four elements, the lege mavanh the short sot hy
1 ap tesla, Toc
edatar sina desig for od
Truc vise perkerrance. Tlas ebnael evul, upiteses any
Suse mola aoe sl tne BO ipl Tae cl eda
plein erupted i he tnd and pide a pd
ing nasser. "The IF preampilier isa tog lor hie arene
fof he ens typ ing ede lela tls "Tho noise gute fora
Iypieal neriver mednlacor and If preampliier with new crystal and
Files awn 1 db ‘The tnemssnn ie essentially Hse ove the bal
ram 64 me to 84 ine, dropping off by about 0: db at 38 ye sd 0 su

Tid nnevien, the deal folate

gremanim eystls tn ¢ ane

o ew

1a Rieir Malar

A sine Whirk sehematie of the seiner modulator ie given is
Fig. te The sce si! pid Ugh the eransdcer rl one
sigh f the tra izlstor into tke set sol juvetion hick formas a 3b
Uvctional enspler, The BO funy ie coupled to the dictions
fenpler tog the woes to eeteguide pron of the input seas
Aner a he ethes Yall of che swim ister, Tho dri eagles
tive th sal wal BA ower equally nd epost ta the ee
falgew sd esa the see ranant

Aline dani th eon is chow i ig he cour
on ie that of Toso rsaakenaregnide sarolaots plas ada by side
fin churn ooration I: plare wal, will ds in te teaton
Tenn a pany inthe waveile wd pari 12 the enaxal cavity,
"The desth thet the ers alpoce pencertas into the euveguide vn
tole she ecup ing betwen Fe vaseline and the wave, He
rratebing the msisivn porta af thr dio icoedaree to sha of uke
Spavrgqde, The wettest wut ie prapees positioned xe
Srevegide sini sou Rekind the junesion wal hy adjvaknent of the
Trugth of thera vavity, which also sree te rompeate o> ites
coves been desea eter tte cll 2 oR 3a
ravi’ ons Fig, fy ane 426 only mean eljl-nense

‘The malian nies geemaniam ile, Walch are mstobod pairs of
NUD type des, plan sia fine Be obtained with a BO puseer
shout 5 ela: ail Fae Bayo one Oc vot from « 200 cha
tourer applied ea ide. Te madara x enworson ls of
Sprott (ll

"The TP sinus n esignn so provide wlequate devon to mito
-wave fcoueieip ant at tae ste Gnesi eapactanee. "The do
ouping © olsained ehrough the wee of ur rue i the LE output
Toul, The vlike emits of xo oneuler wavclength Fadal ines
he of ee Fines is ses Heh lf uf he SRR Me to GI5-me
Inn. Thi giver maa verti less 3 as ve he band. The
Doss of th snake along, the I output ine 0 ies tat Loe
rosomss hassunnven am wecRIeTR 127

Impoenes is presto mt tue wari wall rough tho a3 of this
fnistrtin teal spaeene othe TE stat tern ew pa
Teast pt 2 mcd, nae etre euecary eae
1 sl ical 18 anv to be taste

The shorts igri jvotin wohl Tor wages sbacing
1598 nnn nee evemme mecmnteat foURAD, SOREEAR tt

comsson FE, plane wall fy hb hese fst emplig le bo fe by
Te jen? Pon applied to ore ip com sides equal betwen
He ese vote watp ara sith wo eospling to the tite arn,
seal ol ce GIS plier lanenes etiem ont arms ce found
In the hplosd the ar: ae eomples aaa 0" phese donee. This
ruin le eellerted signal unos fom the diede riedultor to appene
tke in he BO acre hn i Liga arpa eonplers hase
fuer Inses garter chan 24 dh, «power pc equal within 0.2 ab, and
fiivtivty af 25 ah better ove the Oteme band

"The tin lator sands of two slr bolas mounted sie by
so with the musepuiles ving nw conn pla all. The isa
tony pret hw hs gale oven. toward the mt
nd igh lw 1 eee eng

‘Oa of The pendits generated yr the modulator fall 8 twee the
RO Trequemy minis egal feequeney. If this prot is rete
Thuk to the mdulstor in the eorzec phase, st nsprowermen in th
ti Agu of up to enecale ds ean be obtalned, However, the ls
fastager n! wong this image frquecey enengy ure moze inert

Fine. achfeest swine suing of tacratiel banepess es wend
be rociied for hata! ae ey ie sation a hae wal
teser the TE encour impale sacy wvee ue baud, hie een
tule alot ri Catsinian penformanee. a olatoe shoreore, is
Trek in Ce BO arn: valor he age a lay ign energy
Pelee ran Fe wat

ATP Povamgiter

ig. ina cchrmati of the LF prcamplilicr eet, Tb uses to AL7A
tries sorectel in suave rat btw the TF tering af the
halanoedmiclaior aad te 35 mn wal mesa ie. "The gaia oi the
preemplifer ic typaly 18 db. As show ot Fig 3, i creme
ede hss non Bor aos wie, et ints ng, ead 15 ichos
Seep

"The preamplifier designed provide a tenasmission eharasrriic
vi fable qe to eof the tes, alg with optim noise pr
Tenranien, Factory and feld adjustments havo boon mnie’ by the
sce of compensation cies sn sy eat! of wing i the Lactic
fon path Tee eorypensation vient grein the ethos ets 0 the
fconrde-cathoe fist stage avd the ari ils of he rounded
pis mune age of The rand

Tra stsble trcstision hansen’ Use inpak yprcance
tke, which ie the eraination of ua aserstage weir, eae
mnogo massive &e WEcRRORE 100

pede ofthe
The inp capes

ale
who Cu sft gio a
coplietion of late eapacitane. Th the
‘pat caparine fan of the stoge, Thi
‘hans he guetta is enum eal the Ail fet. Li mang
clxng tobi, oe of whi

estate elt for

see, mal A ie th

i ot be use

hf 8

ig. she inp eae ane fe reed a td,
pen eal naps dependent vei ai ‘im

Throne on gona he cathe
fash 2 posite, This ros neve

Tciig eh t eatinde sl iastance soe ear aves wits both
1500 nine muLL SYN RREHIENL JOUHRAD, SOFEBENER 160

she senae af th frequeney an she oper gxin, These variations ia
fhe input reese minke Ht ar frm fe! termintion for sens
feage networks The Fee se of the series sexist ale For ene

itanee eorpeosaioy wales te iup eridaure even love’. Hitmen,
fhsnpactes in peel th this metor tex af Tig 6} fom «ad
Ses menant visit with the eatzode had fadueanee, and eed
Tne indurtance. The allen inpat 2estane, sth the compen

tion cenit ad, pcre ithe upper eure of Fg 7,

Sigbiliy of the iopnt tmpedcaee to the grounded stege is ob-
laine in sie sty hy pene a al estore capacitor (a and
febof Fg. 6) pri the gra en.

‘The coupling network Telwren the easier worlator ante
sroundos-eathode sage ean adjstahle chee-eol network in aT eon
Tiguan. Te iste btn aptiona unix perforaunee, and
indesign vo operate with the TE impedance of the mvulator at ane
erminsion ard with the ingot impecanee to the tube oe the other
‘The only insportant eretive‘eaing applied Ly the weal eorsponest
ff the LP ipedanse of the eye

‘Phe inertage neck bear to falas apes we atest
Empleo super, este, stray iva pay a dao a
roles The lel ast os ener ete pl aa ele,
The aries hwing rupee sae seein ty ad

at ep ano a

rire vv oon «Eee wit sgt he