Mark,
I was working on my phasing rig all week (CE 20A), and there were
several
loose pins found in two different 9 pin sockets. From the top I could see
that the openings were a little large on those pins giving me fits, so I
took a tiny jewelers screwdriver, and "crunched" the opening a tad bit from
two sides, and tried the tube on for size. If the pin deformed again, I
replaced the pin from a similar type 7, or 9 pin socket. It is not so hard
to replace a bad pin, but it can be a royal pain to replace a whole socket.
So far so good..
As for cleaners, on ceramic switches & tube sockets, I have been using
what
was there....automotive brake cleaner! Just make sure the power is off (very
flammable), and keep away from painted panels, and plastic. Wipe up excess
with a paper towel. When most of it has evaporated, carefully warm things up
with a hair dryer. NO SPARKS though. It Works GREAT! Well so far that
is...That stuff sure is inexpensive! Works great on dirty pots too.
As for those electrolytics. Replace them. I have been burned too many
times
having one of those 30+ year old cans, tubular, etc. short out, or open on
me. Modern electrolytics are smaller, usually inexpensive, and much more
reliable. I did this on my Gonset GSB-201 linear, and I doubled the
capacity, and each cap was smaller then the original. My take is that if you
don't do it, then never leave your ham gear powered up, and unattended.
Also, never replace the 2 amp fuse with a 20 amp, and then forget about it!
Regards,
Jim
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Mark Foltarz
> Sent: Sunday, January 26, 2003 3:35 PM
> To: [email protected]; [EMAIL PROTECTED]
> Subject: [AMRadio] on cleaning tube sockets and pins
>
>
> I am ressurecting a Viking Invader 2000. It is coming
> back to life reasonably well. Almost ready to pop in
> the 4-400's and burn the house down.
>
> I had to replace a rectifier and a couple of
> electrolytics in the exciter supply.
>
> The balance of the orignal electrolytics all formed
> such that each draws no more than 2 MA @ 450 DC. Not
> bad for 40 year old firecrackers!
>
> Some crud managed to get in the threads of a couple of
> the padders in the driver tank. I have cleaned the
> threads of the trimmers and have good output in the
> various modes. Sure is a lot easier than adjusting a
> phasing rig!
>
> Dirt or oxidation had gotten into a couple of tube
> sockets and this made the output unstable.
> Eventually, alignment of the various stages yielded
> good results - I just had to periodically wiggle a
> mixer tube.
>
> Thus, the most trouble I am having is related to
> intermittant connections on the various 7 & 9 pin
> tubes.
>
> Any body have any "sure fire" tricks on cleaning tube
> sockets and pins of minature tubes?
>
> TNX
> de KA4JVY
> Mark
>
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