To correct, INSTALL: .005 uf capacitor [PN 21-57] in parallel with the .2 uf capacitor at
C3. Install only as needed.
ah.1.24. HW-101-22: Relative Power Meter Pegs on 15 And 10 Meter
APRIL 14, 1978
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-22
Diode CR-901 [PN 56-26] should be mounted on terminal strip BR with 1/2" leads. This
introduces a slight amount of inductance into the circuit, which cures the problem.
The next manual level will include this instruction.
ah.1.25. HW-101-23: Relays Remain Energized After Transmit Condition
JUNE 5, 1978
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-23
After keying the transceiver with PTT for thirty to forty seconds, a positive voltage in
excess of 10 volts appears at the control grid, pin 9 of V12, thus keeping the relays
energized.
To correct the problem, replace V12 [PN411-124]. IEC Brand tubes have been found
defective in several cases, but other brands may also cause this problem.
ah.1.26. HW-101-24: Poor AGC Action
JUNE 5, 1978
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-24
Leakage in the 6HS6 tubes [PN 411-247] at V10 and/or V11 has been found to cause:
- poor AGC action
- Fast S-meter decay
- poor sensitivity when RF gain control is fully clockwise.
This usually occurs after warmup of at least an hour. A positive voltage, usually over 1
volt, will appear at the grid, pin 1, of either one or both tubes.
Replacement of the tube with the positive voltage corrects the problem.
ah.1.27. HW-101-25: 100 KHz Calibrator Spurs
JUNE 5, 1978
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-25
Strong signals may occur at other than 100khz points.
HW-101 Service Bulletins Page 142
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