tubes age 174
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Date: Wed, 19 Apr 2006 08:42:13 -0700
Subject: RE: [R-390] 6C4? 6C4W? 6C4WA?
I just Googled around and found lots of references to "6C4P" (6S4P was more
common however) but no 6C4A. I'm not ruling out that transliteration, but I
didn't see anyone using it. In any case, if someone plugs one in in place of an
American-numbered 6C4, they will be disappointed. The numbering systems
have nothing to do with each other and any resemblance is a coincidence.
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Date: Wed, 19 Apr 2006 17:47:29 -0400
Subject: Re: [R-390] 6C4? 6C4W? 6C4WA?
Another numbering gotcha: 6CW4 might conceivably be confused with 6C4W.
But it won't even come close to fitting in the socket!!! But rather than guess what
typos somebody else may have made, this afternoon when I got home I put in
three 6C4W's and the radio works just fine (even bumping up against some of
my local AM BCB intermod sources) with nearly identical S-meter reading (1 to
2 db higher) than the few-months-installed (and 50 year old) 6C4's I had in
there.
So my uneducated but empirical conclusion: whoever wrote that 6C4W's won't
work was obviously mistaken.
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Date: Wed, 19 Apr 2006 18:03:22 -0400
Subject: RE: [R-390] 6C4? 6C4W? 6C4WA?
The Russian 6C4P is equivqlent to European EZ80 and US 6V4 dual rectifier.
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Date: Wed, 19 Apr 2006 22:11:33 +0000
Subject: Re: [R-390] 6C4? 6C4W? 6C4WA?
I have a few different manuals. The oldest states "no substitutions". W WA or
whatever. the newer manual which is dated April 1970 does not mention the
tube substitution and has the correct tube listed as 6C4W.
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