[Johnson] CHALLENGER STANDBY PLATE CURRENT

[Ed - K9EW]

Hi Glen,

Yes, the 1/4" plug is in the key jack, and the key is open.

If C3 or C4 were shorted, wouldn't that also key the oscillator and
buffer?  I don't hear the oscillator running.

I'll check those two caps tonight.

Thanks - ed, k9ew


On Tue, Dec 17, 2013 at 4:37 PM, Glen Zook <gzook at yahoo.com> wrote:

> Do you have a key plugged into the key jack?  The key jack shorts the
> cathodes to ground when there is not a key plugged in.  80 mA is not right!
>  It should be 0!
>
> If you have a key plugged in, and the key is open, then there are
> 2-capacitors that may be shorted.  The most likely is C-3, a 2 mfd
> capacitor.  The "modern" replacement will be 2.2 mfd.  Replace with at
> least the rated voltage on the capacitor and a higher voltage rating is
> better.
>
> The other capacitor is C-4, a .005 mfd capacitor.  The "modern"
> replacement will be 0.0047 mfd.
>
> Glen, K9STH
>
>
> Website: http://k9sth.com
>
>
>   On Tuesday, December 17, 2013 2:50 PM, Ed - K9EW <k9ew57 at gmail.com>
> wrote:
>  I just got my "new" Challenger set up for my winter station, and I have a
> question...
>
> The Plate Current is about 80mA with the Operate switch in the Standby
> position (Grid Current is zero).  Does that sound right?
>
> Thanks - ed, k9ew
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