Atlas 210x User Manual

4-15. PC-400C VFO Circuit Board and Tuning Circuits
PC-400C contains the VFO Oscillator Q401, F.E.T. Buffer 0402, and Output Amplifier 0403. The output of the VFO
Oscillator is coupled through C408 to pin 3 of the external oscillator socket, through the jumper to pin 2, then direct to
terminal 13 of PC-300C. From terminal 13 of PC-300C, the VFO signal is fed to the F.E.T. Oscillator Switch. Voltage
regulation for the VFO circuits is provided by Ql and D2 on the main chassis.
VFO FREQUENCY CHART, MODEL 210x
I.F. at 5520 kHz
SIGNAL RANGE INTERNAL VFO
RANGE
3500- 4000
7000- 7500
14000- 14500
21000-21500
28400 - 29400
9020- 9520
12520- 13020
8480- 8980
15480- 15980
22880 - 23880
VFO FREQUENCY CHART, MODEL 215x
I.F. at 5520 kHz
SIGNAL RANGE INTERNAL VFO
RANGE
1800- 2100
3500- 4000
7000- 7500
14000- 14500
21000-21500
7320- 7620
9020- 9520
12520- 13020
8480- 8980
15480- 15980
PC-400C CIRCUIT COMPONENTS
C401, 402, 406, R401, 412 ......
..... 27 10% 1/4 Watt
407, 408 .......... .01 MF l00v Disc R402, 403 ......
.... 10K 10% 1/4 Watt
C403 ................ 300pF 5% SM R404, 409 ......
.... .470 10% 1/4 Watt
C404 ................ 430pF 5% SM R405 .........
.... .680 10% 1/4 Watt
C405 ............... l00pF 10% Disc R406 .........
.... 15K 10% 1/4 Watt
C409 ............. .001 MF 20% Disc R407 .........
.... 4.7K 10% 1/4 Watt
C410 ................ 15pF 5% Disc R408 .........
.... .820 10% 1/4 Watt
L402.................. 1uh RFC R410 .........
.... 2.7K 10% 1/4 Watt
L403.................. 33 uh RFC R411.........
..... 10 10% 1/4 Watt
Q401 .............. 2N706 Osc. Stage R413 .........
..... 100 10% 1/4 Watt
Q402 .............. MPS6514 Buffer
Q403 . .......... 2N3866 Output Amp.
MODEL 21 Ox TUNING SECTION MODEL215x TUNING SECTION
C411, 416, 419, 422, 423 . . 3-12pF Trimmer C428, 433,436,440 , 441 . . 3-12pF Trimmer
C412,413,414 ......... l0pF 10% Disc
C429.........
....... 15pF 5% Disc
C415,420,421,447 ...... 4.7pF 10% Disc
C430, 438, 439 ...
....... 22pF 5% Disc
C417 ................ 22pF 5% Disc
C431,434,435 . . .
...... 4.7pF 10% Disc
C418.424 ............. 20pF 5% Disc
C432,437,442,443
...... 10pF 10% Disc
C425 ................ 27pF 5% Disc
C444.........
....... 0.8pF Dial Set
C426 ................ 0.8pF Dial Set
C445A ........
..... 4pF Main Tuning
C427A ............. 4pF Main Tuning
C445B ........
..... 8pF Main Tuning
C427B ............. 8pF Main Tuning C446......... ....... 27pF 5% Disc
PC400C VOLTAGE CHART
TERM. STRIP
NUMBER
REC. TRANS.
0401
Base
Collector
Emitter
+4
+4.5
+3.5
+4
+4.5
+3.5
TERM. STRIP
NUMBER
REC. TRANS.
Q402
Base
Emitter
Collector
+5.2
+6
+9.2
+5.2
+6
+9.2
34
TERM. STRIP
NUMBER
REC. TRANS.
Q403
Base
Collector
Emitter
+4.3
+6
+3.6
+4.3
+6
+3.6

Atlas 210x Specifications

General

Brand	Atlas
Model	210x
Category	Transceiver
Language	English