2@

nut between the spacer and the ca::e back. This Ą-ĄO nut keeps a k'W ^x 1>" machinę screw on the back of the case from getting lost. The screw fastens the back to the threaded spacer when the job is done, and should not be held tight-ly in place by the nut; it must be allowed to turn freely.

Wire the jacks. the switch and battery clip next; gluc a piece of U"-thick foain plastic pad in place to cushion the battery. Then mount Ihe parts on the print-ed Circuit board as shown. making suro to obsorve polarity of the clectrolytic eapacitors. Mount C5 and C6 on the lugs of the coil form.

The transistor spccified for was used because it was available at a Iow price from surplus. Almost any npn transistor mounted in the same size can (TO-18) may be substituted. A 2N70C would work well. The epoxy case transistor units madę by GE and Tl. such as Ihe TI419 used for will also work if the leads are bcnt to fit the proper holes.

After all the other parts are mounted and soldercd, install the volume control (R7) on the bottom of the circuit board. To preparc the control for mounting. bend the two outside control leads on the control ovcr the edge of the Control s phenolic base ; bend the center lead in the same direction. and trim all leads to

Completed transmitter. vwith all parts except R7 mounted on blank $ide of Ihe printed Circuit board.

1/4-—.    L-3/4--

3/8'

JM

T

3/rf*—j    1/4'

^— T

3/4”

L

1/4

o* -

• fifOlA

3/4

An aluminum sheet aDout 1/32" thick can be cut. bent. and pamted to form an attractive housmg.

Mny. 1965

PARTS LIST

Bi — y/o// battery

(. / — lOyit., i J-roit f/fi / rałjttc eapaeito t ( 2—30*ut. ICtotf eiectrotyiie t apauto*

(    15-tolt tUitwlUiC eapaeitnr

i j-n.ooytif' su-mit ciratuic capacitor iCtarta-

lab i.K WO or n/i/naleui } c 5. (.fi—1 -pi.. O temperaturę cocfficteut, cer famie

.//•i cap,u not

< 7—0.0 i /i/., .$i m r»V/ cer a wie cap*icitor (Centra* Uh CK im u• 44/atrjlint)

CS—2-pf.. • arlmn ot etramie ca pac nor

/I — Miuuture phano ful (Suitebcraft 42A ot

l (/ftłł.iJcHf

12—Single ImU mount mg U ho u o jack (Strach* i raił i sol 11* or enuiialent)

L1—J ^x/a inno o i — 26 magnet udrę on 0.3"-o d.

i oii łunn    • /', bigb-fretf Kenty Urnie iwr*

Pl —i*i. ono piny: iStnUberafl 3JOtAt or erfuira* lent)

Ol 2.\702 i ran i hi nr 02—2S I.W2 iraamtor y.wT///y ifdHii*t*>f

ł\ t    —    uitHs \ 1 >*U\ttt

R2—    oh w *    ę re*i$toc*

R3-IOOU ohm    J

R4—IOJHI0 abms R S —2200 oban Re*—4^yO oh hi i

R7 jtHW-obw iriniuier pałcutianteirr ii TS 201

OT H/Hffjłt ur 4

RO—2?.OiNi-»łbm. ty* wat i resislor_#

RiO—220-obw *c*łstor (tuo 470-ohm resiston in patalltl 1

SI—S.p.s.t. miniaturę slidt switch

l—i.irenił hoarj (Deuno—cteheJ anJ JrilleJ* I

1—MłtłiafMtL ino topione i Siarę MC-20AJ or enttnaU nn^e*

t — ^J/:~ x 4-40 tbrcaJfJ tpacer {Herman Smith

2372 or cifuiralemt)

At/n .—lane. bartery clip. urre. solJer. etc.

•An ctchcd .uh! JrilleJ circuit b<urJ plus wounJ coil ii (CB-129) is milible Iwm Demco, Bos IAu 11. San Antonio. T«as ”8216. for $2 post-paitl. A kit ot tlić listcJ parts. iiuludmjj the spccial case shnwn hut NOT the microphonc l(B(M2M is SIU.OO. A kit ot all parts induJ in>: ilu* micruphtine tCBTM 125) is S 18.00.

' "Smuhlf layalirr tm* murnphones ifKiuJc the Shurc S6u .md J2u, Turner 58. American D 12L or D IlL Asiatic \35U and Hkctro-Yoicc 6*f9B or 62 i

37