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

[Bill & Becky Marvin]

Hi Kim

Over the years working on 170 & 180's I have found most  6C4's test fine but 
will stop oscilating unless I use
the 6C4 milspec tube  i.e  HQ180 will stop working on  below    630 KKhz on 
the BCB

Very Best

Bill

----- Original Message ----- 
From: "Kim Herron" <kim.herron at sbcglobal.net>
To: <gzook at yahoo.com>; <hammarlund at mailman.qth.net>; "'Mike & Coreen Smith'" 
<ve9aa at nbnet.nb.ca>
Sent: Wednesday, January 21, 2009 6:23 PM
Subject: Re: [Hammarlund] 6C4 issues - progress ! (was dead on 15m HQ-170a)


>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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