Some HW-16 problems...

Ken Gordon keng at UIDAHO.EDU
Tue Sep 30 20:05:33 EDT 1997

Picked up a basket-case HW-16 about a year ago. When I got it working the
FIRST time, it chirped with crystals, but not with an external VFO (VF-1),
and had a T-5 note on 80.

One or more of the filter caps shorted one day and took out two of the
"filter" resistors in the filter string, so I replaced the caps with
Nichicon 470 ufd @ 450 vdc, the resistors with a 6 Hy filter choke,
and installed two VR-150s. Rewired the tx osc. stage to put regulated 150
vdc on the screen and regulated 300 vdc on the plate, and, while I was at
it, used regulated voltages for all the receiver except the audio amp

Still chirps with crystals, but the note on 80 is now T-9 and it puts out
nearly 50 watts on all three bands.

Anyone have any really bright ideas concerning how to stop the chirp
without eliminating the QSK (such as it is)?

I also had to parallel the 150 pfd cap (which is switched across the final
tuning cap for 80) with another 12 pfd to get the final to tune at the low
end of 80.


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