Re: {Collins} KWM-2A Tone Oscillator Failure

[Frank Knutzen <KF5EN@xxxxxxxxxxx>]

Yep, have a handful of them - all good = not the problem.

Frank

On 5/5/2015 8:08 PM, bkemp@xxxxxxxxxxx wrote:
> OK...those 6U8's are usually suspect...have you tried different 6U8's
> Bob
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>     -------- Original Message --------
>     Subject: Re: {Collins} KWM-2A Tone Oscillator Failure
>     From: Frank Knutzen <KF5EN@xxxxxxxxxxx <mailto:KF5EN@xxxxxxxxxxx>>
>     Date: Tue, May 05, 2015 6:31 pm
>     To: bkemp@xxxxxxxxxxx <mailto:bkemp@xxxxxxxxxxx>,
>     collins-request@xxxxxxxxxxxxx <mailto:collins-request@xxxxxxxxxxxxx>
>
>     Hi Bob and the group,
>
>     No, cannot tune up properly. Problem is definitely confirmed to be
>     in V2B, the pentode section of the 6U8A because there is no
>     oscillation on either the plate or grid.
>
>     Frank
>     KF5EN
>
>     On 5/5/2015 2:38 PM, bkemp@xxxxxxxxxxx wrote:
> >     Frank:
> >     So you can tune up OK is that what you're saying?
> >     Check those tubes in the mic circuit   i.e. V4, V17 maybe and I
> >     think there's one other in the mic circuit.
> >     Bob
> >     The tone osc injects a signal for tuning up! Do you get full
> >     output on tuning pu?
> >     Bob
> >
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> >     **