Due to the low percentage of the tested diodes meeting the low reverse-current spec,
the germanium diodes in this kit are being changed as follows:
- CR1, CR2, CR3 and CR4 in the Balanced Modulator circuit are being changed to
[PN 56-87] hot-carrier diodes.
- CR901, CR941 and CR201 are being changed to non-selected [PN 56-26]
diodes.
Install these changes only when needed.
ah.1.16. HW-101-14: Improve ALC Adjustment
APRIL 28, 1977
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-14
Remove: R202 (10 k ohm) and replace with a jumper wire.
ah.1.17. HW-101-15: Driver and Mixer Switch Shields Will Not Take Solder
JUNE 2, 1977
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-15
The two switch shields which have a zinc coating, will not take solder. To correct this,
the coating on these shields has been changed to a “lustre lite” coating. The part
number of the shield remains the same, [PN 206-519]. The new shields can be
identified by the “gold” color.
Any switch shield that will not take solder should be changed to the newer-type shield.
ah.1.18. HW-101-16: Side Tone Too Loud
AUGUST 23, 1977
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-16
Complaints are being received that the side tone is too loud when using headphones
with this unit. To reduce the side tone level,
CHANGE: R326 from 1 Megohm to 3.3 Megohm [PN 1-38].
ah.1.19. HW-101-17: Transceiver Oscillates In Transmit With the Mic Keyed
SEPTEMBER 28, 1977
HW-101 BULLETIN NO: SSB TRANSCEIVER HW-101-17
If it is not possible to null the carrier and get more than ~25 watts with the microphone
keyed and the mic level turned down, V12 [PN 411-124] may be causing the transmit
mixer to oscillate. The mic level control will operate nearly normal in tune, but will
exhibit normal control over the first 75% of the rotation and will decrease the output over
the last 25%.
HW-101 Service Bulletins Page 140
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