[Johnson] CHALLENGER PLATE CURRENT?

[Tony]

While on the subject of the Johnson Challenger, I've got my eyes open for a
Challenger power transformer.  My Challenger is in beautiful condition
except for the now "smokeless" transformer.  Anyone have a junque Challenger
with a good power transformer?
Thanks
73
Tony, W4FOA
PS: I don't remember what the meter settings were when it was in
operation...sri

-----Original Message-----
From: johnson-bounces at mailman.qth.net
[mailto:johnson-bounces at mailman.qth.net] On Behalf Of WQ9E at btsnetworks.net
Sent: Saturday, October 29, 2011 11:51 AM
To: k9ew57 at gmail.com; johnson at mailman.qth.net
Subject: Re: [Johnson] CHALLENGER PLATE CURRENT?

Ed,

I don't have my Challenger hooked up currently but I don't recall it drawing
that level of current in standby or key up.  It sounds like the clamper tube
may not be doing its job.  Check the screen voltage on the final, it should
be zero in standby and 10 volts CW key up according to the manual; if not
check the clamp tube and its associated circuitry.

Rodger WQ9E

-------- Original Message --------
> From: Ed - K9EW <k9ew57 at gmail.com>
> Sent: Saturday, October 29, 2011 9:43 AM
> To: Johnson List <johnson at mailman.qth.net>
> Subject: [Johnson] CHALLENGER PLATE CURRENT?
> 
> I am resurrecting a Viking Challenger that I got at a hamfest last year.
> It's in pretty good condition; I just changed the (original)
electrolytics,
> plus R25 which looked like it may have been overheated.  The chassis is in
> very good condition, but the cabinet will need a paint job.
> 
> After installing the new parts, I fired it up to check it out into a dummy
> load.  I was happy to see 100w on 40m with about 200mA of plate current.
> But I was surprised to see 80mA of plate current when in the STANDBY mode.
> In the TUNE and the CW modes, I see 110mA of plate current (key up).
> 
> Are these normal readings?  If not, what should I be seeing?
> 
> Thanks and 73,
> ed - k9ew
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