- Remove and discard R326.
- Install a 0.005 uF capacitor [PN 21-27] between the underside foil of pin 1 of V15
and the end lug of the volume control (inside lug that is nearest R302 & 303).
- Install a 500 kilohm CW volume control [PN 10-149] with a fiber washer [PN 253-
34] as shown.
- [[This is installed at the lower right hand corner of the PCB, where the middle lug
is positioned where it can connect to the foil where C311 connects]].
ah.1.75. HW-101-71: The #266-1116 Switch Detent Breaks During Installation
SEPTEMBER 25, 1981
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-71
This occasionally happens when installing the switch detent to the front panel.
To correct, install two 3-48 x 3/8” screws [PN 250-172] with two lockwashers [PN 254-
7], and two [PN 252-1] nuts.
[[The 3-48 x 3/8” screws and nuts are inserted through the switch detent on the inside of
the panel, along with one of the lockwashers. The other lockwasher and control nut are
then connected on the outside of the front panel]].
ah.1.76. HW-101-72: VOX Cycling
OCTOBER 21, 1981
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-72
This may be caused by a spike introduced at the input of the VOX amplifier.
To correct, install a [PN 57-27] diode in series with the white-red-red wire at the junction
of resistors R213 and R214.
[[The diode is placed in series between the aforementioned junction of R213/214 and
lug 2 & 3 of the PTT switch. The cathode connected to the wire going to the junction,
and the anode connected to the path going to the PTT switch]].
ah.1.77. HW-101-73: Tone in Audio When Switch To CW; Relay Chatters When
Key is Closed
NOVEMBER 13, 1981
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-73
Check for an open 40 uF capacitor [PN 25-36] at C5 in the PS-23A power supply.
HW-101 Service Bulletins Page 156
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