A single 3CX800 is all the MLA-2500 power transformer can handle and you
will increase available dissipation from 600 to 800W.
Cooling changes are a little involved but you have a lot of dissipation
overhead to play with.
Carl
KM1H
----- Original Message -----
From: "Fortra" <fortra@siol.net>
To: <amps@contesting.com>
Sent: Sunday, November 09, 2014 4:05 AM
Subject: Re: [Amps] 8875 in Dentron MLA 2500B
Hi Guys,
one of the tubes, 8875 went south in my Dentron MLA 2500B.
What is interesting, is that it has occasional contact between pins
5 and 6 when tapping on the body.
Measured resistance in good tube was cca 0.8 to 0.9 ohms.
Measured resistance in bad tube varies from several kiloohms to 1.0 ohm.
Is there any solution to this ( probably you have heard of the stories
about internal welding by using higher voltage on pins and gently taping
the tube:)
I have several GI7BT, but could not convince myself into butchery
procedure of
replacing and dismantling 8875...
Or, check the sacred secret fund and buy a pair of 3cx800a7 :)
Thanks,
Nermin S58DX
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