[Boatanchors] Heathkit HW101 Rx problem

[Jaime Gomez]

Thanks to all who answered my request about this nice HW-101. I have a lot
of information about different things to try. First I will replace the D101
diode and add the diode in series with the 6146s' screen lead (This one
sounds very reasonable). I will let you know next week because this weekend
I will be busy with the WAE contest.

73,

Jim, HK1n

On Thu, Aug 12, 2010 at 11:20 PM, Drew P. <drewrailleur807 at yahoo.com> wrote:

> Jim wrote:
>
> > I am repairing a Heathkit HW-101, it is transmitting and
> > receiving OK after
> > electrolytics replacement and rig alignment. Now I have
> > delay for the
> > receiver to recover after transmitting. The manual says to
> > check D101, it is
> > OK. I wonder if anybody has experienced this problem
> > before?
>
> This problem is often due to screen grid emission in the 6146 final
> amplifier tubes during receive.  In the SB/HW 100 series, the final screens,
> the driver screen, and the isolation amplifier screens are all supposed to
> be at a negative potential during receive, but final screen emission drives
> the whole lot positive.  The cure is addition of a diode in series with the
> lead feeding the final screens.
>
> Drew
>
>
>
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-- 
Jim, HK1N