Ss-40ht Assembly Manual v1.1f

8/17/2019 Ss-40ht Assembly Manual v1.1f

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SS-40HT Receiver Assembly Manual

for Printed Circuit Board V!0HT

"Manual V!#$

Co%yri&'t ( )04 #or*ard

+im ,ort&e ,./1

2

T'e 4 State RP 3rou%

T'e #irst SS-40HT Receiver ( Com%leted 05)65)04

/ntroduced at 78ar9con )04


2/30

/ntroduction

Thank you for purchasing a SS-40HT Receiver. We hope you will enjoy building i and using i o

lisen o he 40-!eer band. This receiver concep was firs conceived several years ago as par of a "-

#and SS#$%W ransceiver. Tha projec is &ongoing'. (n he )eani)e* i see)ed like a good idea ocreae a sand alone receiver which could be used wih he 4 Sae +R, group S-40 Trans)ier or

oher 40-!eer rans)ier/ and he 1(+2 !agic#o3* also available fro) 4 Sae/ o asse)ble a

co)plee saion.

This newes version of he SS-40 Receiver has header pins added so ha i can be easily inerfaced o a

newly designed SS-40 Trans)ier #oard o creae a co)plee 40-)eer ransceiver. (n addiion* anaenuaor has been added a he oupu of he 56 so ha he drive level ino he )i3er can be easily

)easured.

This receiver is a superherodyne design e)ploying a very Sable 56 for fre7uency conrol. ( has no

percepible drif* even fro) a cold sar. ( is also very Sensiive wih an !8S of beer han -9:0 d#).

Since i operaes on 40-!eers* i was dubbed he SS-40HT Receiver. 6her feaures of he receiver

include roo) filling volu)e when using a speaker* ; #uerworh crysal filer. ( unes "=-:0 H> of he band including he wo +R, waering

holes a ?0:0 and ?040 H>.

,rined %ircui #oard consrucion is used wih wide par spacing. ;ll of he pars have leads e3cep for

he )i3er* which is a large fooprin surface )oun uni. 6nly " oroids wih a single winding each are

used* )ini)i>ing frusraion for new builders. ;ll conrols and jacks are ,%# )ouned* eli)inaingconrol wiring. The receiver can be consruced by beginners as well as e3perienced builders.

%onsrucion i)e is appro3i)aely "0 hours* depending on e3perience level. #uilding follows he

sche)aic diagra) layou* allowing secions o be co)pleed and esed when possible before )oving

on.


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#irst Ste%s

#efore geing sared wih building he receiver* ake so)e i)e o organi>e and fa)iliari>e yourself

wih he pars provided and check he) agains he #ill of !aerial. #uilding over a cookie shee is

reco))ended o )ini)i>e pars being los. (f pars are )issing in your ki* send an e)ail o


4/30

Bsing a sharp pair of diagonal cuers* re)ove he shor par of he pin below he collar area as show in

he ne3 phoo.

!odified Header ,ins

(nser hese pins ino he ouer holes of he ,%#* fro) he boo) side* where he uning poenio)eerR" is )ouned and carefully solder he pins o secure he). (f you have li7uid flu3 available* use a

s)all a)oun of ha a each pin locaion o )ake he solder flow beer. The boo) of he ,%# will

look like he ne3 phoo.

!odified ,ins Soldered o ,%#

Turn he ,%# over and place he 90 linear poenio)eer solder lugs over hese pins wih he shaf poining away fro) he board. (f you have li7uid flu3 available* use a s)all a)oun of ha a each pin

locaion o )ake he solder flow beer. %arefully solder one of he poenio)eer lugs o iscorresponding pin while holding he poenio)eer down agains he ,%# surface and pushed genly

away fro) he edge of he ,%# so ha he poenio)eer is aligned as far rearward as is will go. (f you

are happy wih he align)en* solder he oher lug* or rehea he firs lug o )ore favorably realign he poenio)eer. 6nce he ouer poenio)eer lugs are soldered* solder he cener lug. When all of he

poenio)eer lugs are soldered* he ,%# will look like he following phoos.

R" !ouned D Aron iew R" !ouned D Rear iew R" !ouned D Side iew


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Testin&

%onfir) ha he poenio)eer is elecrically conneced o he ,%# by )easuring is resisance. ,lace

one lead of an 6h) )eer a he righ )ouning hole for resisor R:0 and he oher lead a he anode

arrow/ of diode 8E. 2ou should ge a reading of F90 6h)s. !ove he 6h) )eer lead fro) 8E ohe lef )ouning hole for resisor R:". %onfir) ha he resisance varies fro) F0 o F90 6h)s as

he shaf of he poenio)eer is roaed over is range.

Ste% ) ( Connectors

(nsall a 4-pin header spanning he locaions G9H; and G9H( insall "-pin headers a locaions G"H*G4H* and 5H. (nser he shorer end of each header fro) he co)ponen side of he ,%# and solder

on he boo) side. Highligh he) on he sche)aic when you are done soldering. 2our ,%# will

look like ha in he phoo below.

(nsall connecors G9 hrough G4. They are all mounted on t'e bottom side of he ,%# and solderedon he op or co)ponen side of he board. These are he only pars ha )oun on he underside of he

,%# everyhing else goes on he op. Highligh he) on he sche)aic when you are done soldering.

2our ,%# will look like ha in he phoos below.


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G9-G4 %onnecors D Top G9-G4 %onnecors D #oo)

Ste% - Po*er Su%%ly Com%onents

(nsall hese co)ponens in he order hey are called ouI 8=-9=19? diode* %49-0.9uA capacior* %40-"" uA capacior )ake sure ha he polariy is correc/* B4-?1J01 1 vol regulaor* %:E-0.9 uA

capacior* and %:1-"" uA capacior )ake sure ha he polariy is correc/. ;s each par is solder inohe ,%#* )ark i off on he sche)aic wih a highligher. When all of he) have been insalled* your

,%# will look like he phoos below.

,ower Supply %o)ponens


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Testin&

;pply 90-94 vols dc o power supply connecor G". Bsing a vol)eer* verify ha here is

appro3i)aely E.=-9:.= vols a he righ pad for resisor RE and 1 vols a he rear pad for capacior

%4?. Bse one of he wo rear )ouning holes for he vol)eer ground lead. (Note: the mating plug

for J2 is the supplied 5.5 mm barrel/2.5 mm pin plug.)

Ste% 4 - Audio Am%lifier Com%onents

#egin his build secion by soldering in he 9 volu)e conrol po* R9. !oun his po jus as you

did for he R" uning po* using )odified header pins. Refer o hose phoos for insallaion deails. e3* insall an 1-pin (% socke a locaion B:. The noch in he socke should )ach he ouline on he

,%#. Solder one lead and verify ha he orienaion is correc before soldering he re)aining leads.

Se7uenially solder in he following parsI %:K-""0uA capacior )ake sure ha he polariy is correc/*%:?-0.9uA capacior* R"4-90 6h) resisor* R"0-"." 6h) resisor* %::-"" uA capacior )ake sure

ha he polariy is correc/* %:9-"" uA capacior )ake sure ha he polariy is correc/* and R9E-90

6h) resisor. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih a highligher.

When all of he) have been insalled* your ,%# will look like he phoo below.

;udio ;)plifier %o)ponens D Rear

Testin&

%arefully bend he leads of he J!:1K chip so ha he pairs of leads are parallel o each oher and perpendicular o he chip body. (nsall he chip ino he B: socke please donL force i and break a

lead. ,lug a speaker or earphones ino audio jack G:. ;pply 90-94 vols o connecor G". Se volu)e

conrol R9 fully clockwise for )a3i)u) volu)e. Touch eiher pad for resisor R"9 wih your finger.; raspy K0 H> signal should be heard. Roae R9 counerclockwise o verify ha he volu)e of he

signal can be lowered.


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Ste% > ( Audio Mute Com%onents

%oninue by insalling he audio )ue co)ponens consising of R"9-"" 6h) resisor* %:=-0.9 uA

capacior* 8K-9=?99 diode* R":-"" 6h) resisor* %:4-0.9 uA capacior* %4"-0.0:: uA capacior*

%44-0.9 uA capacior* R91-4? 6h) resisor* +4-G:90 ransisor (Note: J310 transistors are static sensitive, so touch the largest metal object near you before picking one up.* R""-9 ! 6h) resisor*

+=-G:90 ransisor* and R"=-4? 6h) resisor. ;s each par is solder ino he ,%#* )ark i off on he

sche)aic wih a highligher. When all of he) have been insalled* your ,%# will look like he phoo below.

;udio !ue %o)ponens

Testin&

o esing of his sage can be done now because here is no dc bias on he G:90 ransisors. WeLll es

his sage afer co)pleing he ne3 sep.

Ste% ? ( Product @etector Com%onents

(nsall an 1-pin socke a he B" posiion. The noch in he socke should )ach he ouline on he ,%#.Solder one lead and verify ha he orienaion is correc before soldering he re)aining leads. (nsall

he following co)ponens %"E-9= pA capacior* T%4-90-?0 pA ri))er capacior re)ove he bends inhe leads before insering i ino he ,%# and orien i so ha he rounded end is grounded/* JK-=.K uHinducor* 5=-E."9 !H> crysal )arked &J6'* use an insulaor under he crysal and ground he crysal

case o he pad provided/* %"1-9"0 pA capacior* %:"-9"0 pA capacior* R9?-:E 6h) resisor* and %:0-

0.9 uA capacior. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih a highligher.

%arefully bend he leads of he S;K9" chip so ha he pairs of leads are parallel o each oher and perpendicular o he chip body. (nsall he chip ino he B" socke please donL force i and break a

lead. When all of he pars have been insalled* your ,%# will look like he phoo below.


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,roduc 8eecor %o)ponens D Rear

Testin&

,lug a speaker or earphones ino audio jack G:. ;pply 90-94 vols o connecor G". Se volu)e conrol

R9 fully clockwise for )a3i)u) volu)e.

,roduc 8eecor D Touch he righ pad of J? wih a : foo es lead. ; hissing signal should be audible.

;udio !uing D Wih he es lead sill conneced o he J? pad* ground he cahode end bar/ of 8Kwih anoher es lead. The hissing signal being heard should now be )ued.

Ste% ( Automatic 3ain Control Com%onents

(nsall he firs se of auo)aic gain conrol co)ponens consising of TR9-90 6h) resisive

ri))er* 8?-9=?99 diode* %4=-90 uA capacior )ake sure ha he polariy is correc/* +K-,"""";ransisor* R"K-9 6h) resisor* %4K-"" uA capacior )ake sure ha he polariy is correc/* J?-9

)H inducor* and %4:-0.09 uA capacior. ;s each par is solder ino he ,%#* )ark i off on he

sche)aic wih a highligher. When all of he) have been insalled* your ,%# will look like he phoo below.


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;uo)aic crysal* %?-"?0 pA capacior* 59-E."9 !H> crysal* %9-9=0 pA capacior* and%=-"?0 pA capacior. Bse an insulaor under each crysal and ground he crysal cases o he pad

provided* as shown in he phoo. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih

a highligher. When all of he) have been insalled* your ,%# will look like he phoo below.


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%rysal Ailer - Rear

Testin&

o esing of his sage can be done now.

Ste% 6 ( /# Am%lifier "B$

(nsall an 1-pin socke a he B9 posiion. The noch in he socke should )ach he ouline on he ,%#.

Solder one lead and verify ha he orienaion is correc before soldering he re)aining leads. (nsallhe re)aining co)ponens in his orderI %"9-9= pA capacior* %"0-4? pA capacior* R4-900 6h)

resisor* J=-4.? uH inducor* R=-4E.E 6h) resisor* %9?-0.9 uA capacior* R90-9." 6h) resisor*

R9"-K" 6h) resisor* %"=-0.9 uA capacior* RE-:E 6h) resisor* and %":-0.9 uA capacior. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih a highligher. When all of he) have

been insalled* your ,%# will look like he phoo below.


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(A ;)plifierMB9# %o)ponens

Testin&

; nu)ber of ess will be perfor)ed afer he B9; co)ponens are insalled.

Ste% 0 ( Post Mier Am%lifier "A$

(nsall he B9;* ,os !i3er ;)plifier co)ponens in his orderI R:-900 6h) resisor* R1-9." 6h)resisor* R99-K" 6h) resisor* %"4-0.9 uA capacior* RK-4E.E 6h) resisor* %9K-0.9 uA capacior* %"K-

0.9 uA capacior* R9K-9 6h) resisor* R9=-9 6h) resisor* %"?-0.9 uA capacior* and R94-:E

6h) resisor. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih a highligher.

%arefully bend he leads of he JT9"=: chip so ha he pairs of leads are parallel o each oher and perpendicular o he chip body. (nsall he chip ino he B9 socke please donL force i and break a

lead. When all of he) have been insalled* your ,%# will look like he phoo below.


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,os !i3er ;)plifierMB9;M%o)ponens - Rear

Testin&

,lug a speaker or earphones ino audio jack G:. ;pply 90-94 vols o connecor G". Se volu)e conrol

R9 fully couner clockwise for )ini)u) volu)e. ow advance he volu)e conrol clockwise. ;

abou E0N roaion* whie noise should be heard and increase in volu)e as he conrol is advanced.

When a full roaion* connec a : foo es lead o he )i3er end of capacior %9K. !ore noise should be heard and possibly so)e saic. The receiver is lisening o E."9: !H>* he no)inal cener

fre7uency of he crysal filer. Roae capaciive ri))er T%4 hrough :K0 degrees. ;s ha is done* a

change in he audio one of he noise should be noiced. WeLll use T%4 o se he receiver o have aK00-?=0 H> audio one when lisening o a %W signal cenered in he pass band of he crysal filer.

Ste% ( V=7 Com%onents

(nsall he following parsI 8E-94941 diode* R:0-9= 6h) resisor* %=9-0.9 uA capacior* R:"-900

6h) resisor* 81-!;!90E uning diode* JE-=.K uH inducor space his par above he ,%# byabou :$9K inch/* R::-"" 6h) resisor* 5K-9K."=? !H> crysal* 5?-9K."=? !H> crysal* 51-9K."=?

!H> crysal use an insulaor under each crysal and ground he crysal cases o he pad provided/*

%=0-4? pA capacior* %=" is no used* R"1-900 6h) resisor* %=:-4? pA capacior* %==-4? pAcapacior* +?-,""""; ransisor* TR"-9 6h) resisive ri))er* R:1-900 6h) resisor* and finally*

%=4-4? pA.. ;s each par is solder ino he ,%#* )ark i off on he sche)aic wih a highligher. When

all of hese pars have been insalled* your ,%# will look like he phoo below.


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56 ,ar 9 %o)ponens

Testin&

; nu)ber of ess can be perfor)ed on his secion of he 56 depending on he es e7uip)en ahand. ;pply 90-94 vols o connecor G". Se TR"* he resisive ri))er o he cener of is roaion.

;ll )easure)ens are aken a he 5H header he lef pin is ground* and he righ pin has he signal.

Bsing an RA ,robe wih a 8!* a volage of 0.1 o 9.0 vols should be seen. Bsing an oscilloscope*

".= vols p-p should be seen. (f a couner is available* he 56 fre7uency can be )easured. The 56unes "= o :0 H>* depending on he crysals and varies fro) receiver o receiver. The uni in he

phoo unes fro) 9K.""K0 !H> o 9K."=: !H>* which is a bi low fro) he ypical. When finished*his receiver should no)inally une fro) ?.09? !H> o ?.04= !H>.

Continuin& t'e V=7 build* insall hese parsI R:9-90 6h) resisor* R:=-9= 6h) resisor* +1-

,""""; ransisor* R:?-4?0 6h) resisor and %41-4? pA capacior. ;s each par is solder ino he

,%#* )ark i off on he sche)aic wih a highligher. When all of hese pars have been insalled* your

,%# will look like he phoo below.


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56 ,ar " %o)ponens D Rear

Testin&

The sa)e ess ha were perfor)ed in he previous sep can be repeaed wih he es poin now being

he base lead of ransisor +E. The resuls will be no)inally he sa)e* since his sage is a gain of 9

well al)os/ buffer.

#inis'in& t'e V=7 build* insall hese parsI R:4-"." 6h) resisor* J90-9 )H inducor* 890-94941 diode* 899-94941 diode* %=K-0.9 uA capacior* %4?-0.9 uA capacior* R"?-1"0 6h) resisor*

+E-,""""; ransisor* R:K-91 6h) resisor* T9-4T ,ri$4T Sec ransfor)er use K inch lenghs of O:0

gauge wire for he windings D see T9 deails page/* %4E-4? pA capacior* J1-9.1 uH inducor* R"E-"E46h) resisor* R:E-91 6h) resisor* and finally* R40-"E4 6h) resisor. ;s each par is solder ino he

,%#* )ark i off on he sche)aic wih a highligher. When all of hese pars have been insalled* your



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56 ,ar : %o)ponens

Testin&

; nu)ber of ess can be perfor)ed on his secion of he 56 depending on he es e7uip)en a

hand. ;pply 90-94 vols o connecor G". Se TR"* he resisive ri))er fully counerclockwise.

!easuring a !i3er !59-pad K and using an RA ,robe wih a 8!* a no)inal level of "?0 )illivols

should be seen. ;s TR" is roaed clockwise* he volage should rise o a no)inal level of 9.1 vols.

;cross he range of TR"* an oscilloscope will show ?:0 )illivols p-p a he low seing and 4.4 vols p-p a he high seing. 6n a specru) analy>er* a he low seing* he signal available is no)inally -1.4

d#) and a he high seing* ?.:d#). ; all seings of TR"* he "nd har)onic of he 9K."=? !H>no)inal/ J6 drive fro) he 56 is "= d# below he carrier level.

Ste% ) ( Mier Com%onent

oice ha &co)ponen' is used as here is only one par o be insalled in his sep. However* i is

probably he )os difficul for )os builders* especially hose who are new ki builders. The key o

soldering he !59 !i3er is o use a iny a)oun of li7uid flu3* if available* on each pad before seinghe )i3er on he ,%#. (f using li7uid flu3* le he par se for 9=-"0 )inues so ha he flu3 &glues' he

chip in place. The oher key is o only solder one pin so ha if he )i3er )oves posiion* ha pin can be reheaed and he chip pushed back ino posiion. ;lso* use a s)all soldering ip for his par.So)ehing on he order of 9$9K inch P$- should work fine on a "=-40 wa soldering iron. 6nce one pin

is soldered and he chip align)en is correc )ake sure he dos align/* solder he oher = pins. Note:The mixer must be installed correctly for the !"#$T recei%er to &or'. This step must be done

right ;fer his par is soldered ono he ,%#* )ark i off on he sche)aic wih a highligher. When

his sep is done* your ,%# will look like he phoos below.


17/30

!i3er !59 %o)ponen D Rear

Testin&

Aun i)eQ ,lug a speaker or earphones ino audio jack G:. Se volu)e conrol R9 for )ini)u)

volu)e. ;pply 90-94 vols o connecor G". ;ach an anenna o he righ pad for capacior %9E.

;dvance he volu)e conrol unil band noise is heard. Bsing he 56 R" uning conrol* unearound o hopefully hear a %W signal on he lower end of 40 )eers. ;djus)en of T%4 )ay be

re7uired o se he %W one you like when receiving. Since no fron-end filering is in place* signals

ha are )uch higher in fre7uency* i.e. hose ha are he )i3ing produc of he 56 P (A* or no)inally"=.4=1 !H> )igh also be heard. The receiver perfor)ance will i)prove significanly when he Aron-

Cnd pars are insalled* bu for now* enjoy he sounds of a )osly working receiverQ

Ste% ( Automatic 3ain Control ) Com%onents

(nsall he second se of auo)aic gain conrol co)ponens consising of +:-,""""; ransisor* R9:-

::0 6h) resisor* +"-,""""; ransisor* and %""-0.09 uA capacior. ;s each par is solder ino he,%#* )ark i off on he sche)aic wih a highligher. When all of hese pars have been insalled* your



18/30

;uo)aic


19/30

Aron-end %o)ponens


20/30

Aron-end %o)ponens D Rear

Aron-end %o)ponens D Jef Aron-Cnd %o)ponens D Righ

Testin&

; lo )ore funQ ,lug a speaker or earphones ino audio jack G:. Se volu)e conrol R9 for )ini)u)

volu)e. Se he 56 )i3er drive level by adjusing ri))er TR" o he cener of is range. ; haseing* appro3i)aely ? d#) of J6 signal is being supplied o he )i3er. ;pply 90-94 vols o

connecor G". ;ach an anenna o he #% anenna connecor* G9. ;dvance he volu)e conrol unil


21/30

band noise is heard. ,eak each of he ri))er capaciors beginning wih T%:* hen T%"* and finally*

T%9. ;fer he iniial pass* go back and ouch each of he) up for he loudes band noise. Bsing he

56 R" uning conrol* une around o hopefully hear a %W signal on he lower end of 40 )eers.

;djus)en of T%4 )ay be re7uired o se he %W one you like when receiving. ; beer job ofaligning he receiver can be perfor)ed using a signal generaor se o ?.0:= !H> wih a signal level of

90-=0 )icrovols driving he inpu G9/ and an R!S vol)eer conneced o he audio oupu connecor

G:. The hree ri))ers are adjused for )a3i)u) signal.

To se he ;


22/30

o deailed is he abiliy o )ue he audio on he receiver using he &key line' which co)es ou on

connecor G4. (f he lead going o he ip of he )aing connecor for his jack is grounded* he )uing

circuiry is acivaed and he receiver audio will be grealy aenuaed. This feaure can be used o )uehe receiver when i is used as par of a saion and he user has i)ple)ened heir own rans)i$receive

swiching seup.


23/30

SS-40HT S%ecifications

The SS-40HT is a 40-!eer* 56 uned* high perfor)ance receiver

• Super sensiive !ini)u) 8iscernible Signal less han -9:0 d#)

• Super 7uie receiver noise floor a leas 40 d# below band noise

•4-pole (A filer for no)inally =0 d# of opposie sideband rejecion

• (A Rejecion greaer han E0 d#

• ()age Rejecion greaer han E= d#

• "=-:0 H> of &no percepible drif' band coverage ?.0:0 ?.040 included/

• ;udio derived ;


24/30

SS-40HT Bill of Material

Par t V alue Par t V alue Par t V alue Par t V alue

C1 150pF R1 39 D1 1N4148 U1 LT1253

C2 150pF R2 39 D2 1N4148 U2 SA612

C3 33pF R3 100 D3 1N4148 U3 LM386

C4 0.1uF R4 100 D4 1N4148 U4 78L08

C5 270pF R5 49.9 D5 1N5817

C6 270pF R6 49.9 D6 1N5711 MX1 ADE-1C7 270pF R7 180 D7 1N5711

C8 150pF R8 1.2K D8 MVAM109 Q1 J310

C9 270pF R9 39 D9 1N4148 Q2 N2222A

C10 270pF R10 1.2K D10 1N4148 Q3 N2222A

C11 0.01uF R11 62 D11 1N4148 Q4 J310

C12 4.7pF R12 62 Q5 J310

C13 270pF R13 330 L1 3.1u! Q6 N2222A

C14 120p R14 39 L2 10u! Q7 N2222A

C15 120p R15 1K L3 1"! Q8 N2222A

C16 0.1uF R16 1K L4 3.3u! Q9 N2222A

C17 0.1uF R17 39 L5 4.7u!

C18 0.01uF R18 47K L6 5.6u!

C19 1000p# R19 10 L7 1"!

C20 47pF R20 2.2K L8 1.8u!C21 15pF R21 22K L9 5.6u!

C22 0.01uF R22 1M L10 1"!

C23 0.1uF R23 22K

C24 0.1uF R24 10

C25 0.1uF R25 47K J1 A$%&$$' J1!A A$%. !&')&*

C26 0.1uF R26 1K J1!+ R, +$pu% !&')&*

C27 0.1uF R27 820 J2 &* J2!

C28 120pF R28 100K J3 Au)/ u%pu%

C29 15pF R29 294 J4 Au)/ Mu%& J4! Mu%& !&')&*

C30 0.1uF R30 15K VX! VX !&')&*

C31 22uF R31 10K

C32 120pF R32 100K T1 4T-4TS

C33 22uF R33 22K X1 9.215M!-20

C34 0.1uF R34 2.2K TC1 10-70pF X2 9.215M!-20

C35 0.1uF R35 15K TC2 10-70pF X3 9.215M!-20C36 220uF R36 18 TC3 10-70pF X4 9.215M!-20

C37 0.1uF R37 470 TC4 10-70pF X5 9.215M!-20

C38 22uF R38 100 TR1 10K X6 16.257M-S

C39 0.1uF R39 18 TR2 1K X7 16.257M-S

C40 22uF R40 294 X8 16.257M-S

C41 0.1uF

C42 0.033uF VR1 1K M/&'$&u

C43 0.01uF VR2 10K 3 8-p/$ D+ &%

C44 0.1uF 4 #% 28 /*&

C45 10uF C51 0.1uF 1 C '*)

C46 22uF C52 TD 1 N-43-2402

C47 0.1uF C53 47pF 2

C48 47pF C54 47pF 2 !&')&* /$

C49 47pF C55 47pF 1 Su$%C50 47pF C56 0.1uF 1 5.5 "" D u:

#* T1

#* L1 ; L4

*. !&')&*

T37-2 %*/)


25/30

Sc'ematic @ia&ram


26/30

Parts Placement


27/30

Metal #ilm Resistor Color Codes

The resisors used in he SS-40HT are )eal fil)* U wa* and 9N olerance devices. They were

seleced for heir lower noise characerisics. The have a so)ewha differen color coding han is usedwih he )ore co))on carbon fil) =N olerance resisors. #elow is a able for resisor values used in

in he SS-40HT receiver and heir color codes.

Value "7'ms$ Color Code

90 #rown #lack #lack


28/30

T Dindin& /nformation

Here is a shor uorial on how o wind ransfor)er T9

#egin wih he #"40"-4: binocular core and wo Kinch lenghs of O"1 or O:0 wire.

#end a wire back on iself abou 9."= inches and inser

ino he core fro) one end. Snug his firs urn up

ighly* bu no o he poin of breaking he wire.

Wind on an addiional :-urns* keeping he urns igh

and organi>ed on he core. ; urn is couned when he

wire goes hrough a core hole and back hrough o heopposie side. When 4-urns have been wound on he

core* he opposie end fro) where he

wires e3i will show 4-urns.

When 4-urns have been wound on* ri) off he e3cess

wire leaving abou 9 inch long leads.


29/30

6n he opposie end of he core* repea he process of

winding 4-urns on he core* keeping he urns igh and

nea.

Tri) all of he wires o appro3i)aely 9 inch* re)ove

he insulaion* hen in each lead as shown. T9 is now

co)plee and ready o insall ino he ,%#.


30/30

SS-40HT Receiver c'an&es *'en used *it' t'e SS-40 Transmit Stri%

6ne )inor change has o be )ade when he SS-40HT Receiver is used wih he SS-40 Trans)i Srip.This change is needed o increase he side one volu)e during rans)i periods when he receiver is

)ued. ;s designed* he side one coupling resisors* R91 and R"=* are 9! 6h) pars* assuring he

side one level is very low. Wih he SS-40 Trans)i Srip aached* )ore audio is desired o hear wha

is being sen. The 9! resisors should be re)oved and replaced wih 4? 6h) resisors. This will sehe side one a a co)forable level for )os operaors wih nor)al hearing. To i)prove he +S

keying* capacior %4" should be changed o a 0.0:: uA value. The above values are included in fuure

releases of he ki.

Documents

Ss-40ht Assembly Manual v1.1f