[Amps] 8875 in Dentron MLA 2500B

[Carl]

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 at siol.net>
To: <amps at 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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