[Hammarlund] 6C4 issues - progress ! (was dead on 15m HQ-170a)

[Kim Herron]

I second what Glen said here.  In fact, if memory serves, Drake's suggestion
on checking tubes was to put them in a known good operating receiver and see
if they work.  I've been doing that with 6F6's and 6L6's for the antique
radio work that I do.  Testers find shorts, gas if it's real bad and open
filaments.  After that, it can be plug it in and see if it plays.  

Kim Herron W8ZV 
www.goldenradioservice.com
kim.herron at sbcglobal.net
1-616-677-3706

-----Original Message-----
From: hammarlund-bounces at mailman.qth.net
[mailto:hammarlund-bounces at mailman.qth.net] On Behalf Of Glen Zook
Sent: Wednesday, January 21, 2009 6:58 PM
To: hammarlund at mailman.qth.net; Mike & Coreen Smith
Subject: Re: [Hammarlund] 6C4 issues - progress ! (was dead on 15m HQ-170a)


This is exactly the reason that I say the best tube checker in the world is
the unit itself.  I have seen a lot of occasions where a tube would check
"good" in a tube tester and not work at all in the radio.  Then other tubes
check bad in a tube tester and work fine in the radio.

Glen, K9STH

Website:  http://k9sth.com


--- On Wed, 1/21/09, Mike & Coreen Smith <ve9aa at nbnet.nb.ca> wrote:

Today, a friend @ work loaned me his Mercury 202 tube tester and gave me a
brand new 6C4 tube (which tested quite good, but not FULL scale on the
meter. (maybe 80-90%..)
 
I popped in the good tube and now 15m is alive with Xtal Cal signals and has
been for 1/2 hour...........now I have jinxed myself I know it.  After I
type this email and hit <send>,. 15m will die for sure.
 
I tested the old 6C4 tube and it also tests good, but a little lower.
(60-70% on the scale)....


      
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