Heathkit GDA 19 2 Schematic 2

Page 2

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MONOSTABLE
TIMER

- BI"L4 ----------------

RG WHT-DRG YEL
9.6V P TO P

'IL

II

-4.-

MONOSTABLE MONOSTABLE HONESTABLE

i I '
..'.'. Ia-o.
0' ..'.I.
...l
to.
.-
o

5 I.-{6}_--___TEE.R.--_-_--Ij7].m 8 I.-___-..T.IM.E:_---___ 9 ]--.IIO]-------TLM-E-:----------{BIR-

WHT YEL (JPN WHT-GRN BLU WHT-BLU RED

9.6V I9 To In 9.6V P TO P

to...

3 3 3 3
'0! 9204 P 27 MHZ
0° 5 o oo 5 020005 £20006 B A N O
HANNEL I! 2 CHANNEL 3! 3 *
ICK CONTROL. STICK CONTROL. SEEIANNCECENQTSOL 5TET I NUMBERS ARE IN THE FOLLOWING GROUPS: 4. OTHIS SYMBOL INDICATES A POSITIVE DC VOLTAGE ME ASUREMENT, TAKEN

WITH A HIGH IMPEDANCE VOLTMETE , FR P N

ITED ON THE ENCODER CIRCUIT BOARD. GROUND. VOLTAGES MAY VARY :20%.R OM THE 0| T INDICATED T0 CHASSIS
ITED ON THE RF TRANSMITTER CIRCUIT BOARD. 72 MHZ
ITED ON THE CHASSIS. 5. REFER TO THE CHASSIS PHOTOGRAPHS AND CIRCUIT BOARD X-RAY VIEWS FOR THE BAND

PHYSICAL LOCATION OF PARTS.

ATT UNLESS MARKED OTHERWISE. RESISTOR VALUES

IRE IN ME UNLESS MARKED OTHERWISE.

FLAT FLAT FLAT
0.. I .
/
B . C
E C BE TAB E TAB
2N3393 2N3641 2N2369

2N3391

I
I
Eu WHT-RED 84 NOTE: I
-.J j] | THE 27,53,AN0 72 MHz BANDS 0E :
: I RF TRANSMITTER CIRCUIT EACH |
I : HAVE A DIFFERENT SCHEMATIC. I
[SEE SCHEMATICS AT R l
: VIOL MOD\:| lGHI.) l ANTENNA
: " *CZDI IS USED ONLY WITH THE 27 : -__*
| . MHz BAND TRANSMITTER, THE I r OPTION
I : OTHER BANDS USE A JUMPER WIRE I ' 5 0T5 9
I ' AND NO CAPACITOR.R207 Is USED 0
l I ONLY ON THE 72 MHz BAND. I-0~--.
I I
I I l I00 PF 59,
I I I 9200
I I I
DI I ' :1:
m I RED _-
I l +
927 I
To CIRCUIT BOARD l
37" ELK GROUND E :
l 2v PTO P | I .- Ij METER
___ I l ITO BL
- I ICIRCUIT BOARD
I I I GROUND
I I
I : I
: .____________ RF TRANSMITTER CIRCUIT BOARD j
I
I
'----'-----*.h--------------------------------------------------_----- *,'|-_'--_F-'-*
-.... ----------- TIL. I '!.' -
0. I1
:00. .IIIII IIIIII
T w 3.
3.. PI] 05 9/? PM 06 PIS 9/7 9/3 92/
47K 50 47K 50K 47K 1 07 50K 47K 08
"I CHANNELRZ ~.
_. RANGE CHANNEL ~ 3 CHANNEL R 4 CHANNEL 6 5
CONTROL RANGE RANGE \ RANGE
C13 CONTROL cu CONTROL {:22 CONTROL C26
5 ~.005 5" .005 A». -005 Amhoos
09 Q4 9 05 . 06
D 150K; 2N3an 501:; 2N339, 1/5385"; 2N33gl .53.?

CRYSTAL
FREQUENCY MHZ
TRANSMITTER RECEIVER
26.995 26.542
27.045 26.592
27.095 26.642
27.145 26.692
27.195 26.742
53.100 20.3235
53.200 26.3735
53.300 26.4235
53.400 26.4735
53.500 26.5235
36.040 36.2665
36.120 36.3465
36.200 36-4265
36.480 36.7065
37.520 37.5935

T0

TO

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MOE

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