Shows .024uf connected from wht-org-org to ground --- 2.2K ohm resistor in line
going to R1
ah.1.56. HW-101-52: VFO Stops Working at High End of All Bands
August 15, 1979
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-52
This problem occurs in all modes except LSB. In LSB, the VFO operates okay.
To Correct:
- Change: R947 from 1000 ohm to 470 ohm [PN 6-471]
- Add: [PN 56-56] diode from gate of Q941 to ground; anode of diode to gate.
ah.1.57. HW-101-53: Low Transmitter Output; Low Receiver Sensitivity
September 20, 1979
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-53
When cleaning the unit during prework [tube sockets, potentiometers, etc.], don't
overlook the SSB/CW filter slide switch located with the RF gain control. This switch
handles both transmit and receive signals and dirt and grease build-up can affect the
performance of both functions.
ah.1.58. HW-101-54: Receiver Audio Troubleshooting Information
September 27, 1979
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-54
Equipment needed:
Audio Signal Generator
Oscilloscope
01uf capacitor 500 volts or greater [PN 21-16]
Procedure:
1. connect a 4 ohm load to the speaker jack.
2. set the AF gain control full clockwise.
3. set the generator to 1 KHZ at .01 volt RMS
4. connect the generator to V13, pin 7 through the .01uf capacitor.
The signal voltages for the points listed should compare with the values given below:
Pin 1 of V14 = 50mv p-p
HW-101 Service Bulletins Page 149
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