[AMPS] 3CX 800 A7
jon
jon@g0nvd.freeserve.co.uk
Sun, 19 Nov 2000 16:12:15 -0000
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Hi All.
Wonder if anyone can help me with a small problem I have with my amp
The amp I have uses a pair of 3CX 800 A7 tubes and is approx 18 months =
old.
The problem is that every so often the main fuse will blow because one =
of the tubes has " flashed over ".
This has been happening every so often since the amp was new so I have =
come to the conclusion that one of the tubes was faulty from the start =
and I have now resigned myself to the fact that I am going to have to =
purchase a new tube.
I am looking for suggestions as to how to find out which tube it is =
without replacing either one in turn or finding out by trial and error =
because sometimes the flashover takes out one or two other small =
components in the amplifier.
One other point is that these flashovers occur usually when I first =
switch on the amp and especially so when it has been stood for a period =
of time without bieng switched on.
Any comments will be greatly appreciated.
Regards Jon G0NVD
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<DIV><FONT size=3D2>Hi All.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Wonder if anyone can help me with a small problem I =
have with=20
my amp</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>The amp I have uses a pair of 3CX 800 A7 tubes and =
is approx=20
18 months old.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>The problem is that every so often the main fuse =
will blow=20
because one of the tubes has " flashed over ".</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>This has been happening every so often since the amp =
was new=20
so I have come to the conclusion that one of the tubes was faulty from =
the start=20
and I have now resigned myself to the fact that I am going to have to =
purchase a=20
new tube.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>I am looking for suggestions as to how to find out =
which tube=20
it is without replacing either one in turn or finding out by trial and =
error=20
because sometimes the flashover takes out one or two other small =
components=20
in the amplifier.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>One other point is that these flashovers occur =
usually when I=20
first switch on the amp and especially so when it has been stood for a =
period of=20
time without bieng switched on.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Any comments will be greatly =
appreciated.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Regards Jon G0NVD</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV> </DIV></BODY></HTML>
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