Version: 13. Sepe,mer 2004
34
[ ] C145 1µF/63V radial C1
[ ] C146 100µF/16V radial C/D1
[ ] C141 0,1µF film RM 5mm A1
[ ] C144 0,1µF film RM 5mm A0/1
[ ] C147 0,22µF film RM 5mm C0/1
[ ] C148 0,01µF film RM 5mm D1
[ ] R96 100K C3
[ ] R97 150K C3
[ ] R98 220R C/D3
[ ] R99 27R C3
[ ] R100 56R C3
[ ] R101 100K C4
[ ] R114 100K metal film 1% A2
[ ] R115 100K metal film 1% A2
[ ] R116 27K A2
[ ] R117 33K A2
[ ] R118 12K A2
[ ] R119 120R B1
[ ] R120 12K B1
[ ] R121 33K B1
[ ] R122 2k2 B/C1
[ ] R123 390R C1
[ ] R124 100K D1
[ ] R125 100K D1
[ ] R126 2,7K C1
[ ] R127 56k C1
[ ] Dr12 100µH SMCC D0/1
The transformer TR6 is identical to the trans-
former TR2 from building group 8. 8 turns
primary and 4 turns secondary, 0.3mm CuL
(AWG 28).
[ ] Tr6 Amidon FT37-43
C/D3
[ ] PIN 21 C3
[ ] PIN 23 A1/2
[ ] PIN 24 B1
[ ] PIN 30 D3
[ ] PIN 48 D1
[ ] PIN 49 D0/1
Test Section 10
1. Visual inspection (see Section 1)
2. Resistance test (see Section 1)
3. Smoke test (see section 1)
[ ] Apply power as in section 1 test.
current about 240 mA
4. Functional test
During the following test remove all bandmodules from their slots.
Add all Voltages to your speaky
[ ] Connect pin 53 to ground (That is the PTT pin)
Use a scope or the RF probe to measure the 8MHz RF Voltage at Pin 4/5 of
IC16 and use P13 to adjust to the lowest possible value.
Solder a 1k Resistor between pin48 and pin 49 at the bottom of the PCB.
Connect a source of an 1kHz (abt) tone (Soundcard, Tone generator, Multi-
meter with Tone source) to pin 48 (gnd) and pin 49 (hot). Measure the AF
Voltage between R122 and C145. Adjust the source to have abt 200mVrms
at this point.
Adjust P16 to get abt 50mV rms at its middle contact
Adjust P15 fully clockwise
Adjust P14 to get abt 600mVpp at IC16 pin 4/5. This is our DSB (double
Sideband Signal. The remaining parts of the signal generation will be adjus-
ted later.
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