HW101 AF HUM

[George T. Baker]

I very vaguely remember that this problem involved a shielded audio line
in a harness that ran across the front of the chassis. Seems like the fix
was to cut that line at both ends and re-route that line for minimum hum
pickup.

It has only been since 1972 that I built my HW-101!

72/73, George
Fairview, TX   30 mi NE Dallas in Collin county
Amateur Radio W5YR, in the 54th year and it just keeps getting better!
R/C since 1964 - AMA 98452   RVing since 1972       Kachina #91900556


Gerry Caines wrote:
>
> Greetings to all,
> I have been spending many hours here resurrecting an old HW101. Can't seem
> to get rid of hum through speaker, most noticeable when AF control fully
> counter clock wise. As one increase AF, hum remains in background. Is this
> normal? Can anyone suggest a possible fix for this annoying hum? I have
> checked all tubes, they seem to be ok.
> 73
> Gerry, VA3GRC

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