I have purchased several YC-156A pulls from this vendor and nearly every one
tested very good. They will exchange if you get a bad tube,however I suggest
if building from scratch to have your tubes tested..Will save hours of
frustration when you finially light off the new amp..Remember: Most of the
pulls offered have been stored for several months (Or years) so de-gassing
is a good idea before use. I test my tubes filament for rated current
pull,hi-pot for twice rated dc voltage,and run in a cooled jig with filament
voltage for at least 8 hrs and then hi-pot again before testing with hv in
my amp.It`s a lot of extra work but saves other component failure in the
event of a flash-over..Zonum Industries will do this procedure for around
100 bucks plus shipping. GL,Jim..K7RDX..
----- Original Message -----
From: "Jack Henkle" <w7jk@verizon.net>
To: <amps@contesting.com>
Sent: Wednesday, January 28, 2009 12:20 AM
Subject: [Amps] Source for YC-156 tubes
> http://ctrsurplus.com/tubes.aspx?gclid=CMO55cy4-5cCFQkzawod1VvT1Q
>
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>
>
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