A good first step is use the resistance chart in the manual for the tube
sockets. I would also check the relay.
73,
Bob WW3QB
Curt, before you throw in the towel, have you tried pulling all the non-final
tubes to be sure it's not an internal short in one of them? It's exceedingly
rare in receiving tubes but not impossible if something came loose internally.
To break up the problem into manageable chunks (assuming the tubes are okay),
follow the B+ line and unhook it half-way from the source and re-check.
Continue splitting the bad side 'til you get there.
Hard shorts are blessings: they generally stay around until you find them!
73,
Steve, W1ES/4
-----Original Message-----
>From: [email protected]
>Sent: Dec 21, 2011 8:17 AM
>To: Gary Poland <[email protected]>
>Cc: [email protected]
>Subject: Re: [Drakelist] AC-4R Surprise
>
>Hello Gary,
>
>Yes, that is what I've concluded too though haven't confirmed with
>measurements yet. I know at one time you repaired Drake equipment (maybe you
>still do), so would appreciate any words of wisdom about finding and
>correcting a short in the B+. Nothing obvious on visible inspection, seems
>finding a short in the B+ will likely be nearly impossible, a lot of area to
>cover.
>
>Maybe need to inquire whether anyone needs a parts rig. It's a shame, the
>cosmetics and until now the performance of this T-4X has been pretty nice.
>
>Thanks in advance, 73, Curt KB5JO
>
>
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