[R-390] 6080 in place of 6802 - RMS ???

Wed, 9 Jan 2002 13:48:42 -0600

Of course, you could use a spare 26Z5W in place of that solid state diode and you wouldn't have to worry about it shorting...

Barry - N4BUQ

-----Original Message-----
From: Roger L Ruszkowski [mailto:[email protected]]
Sent: Wednesday, January 09, 2002 1:39 PM
To: [email protected]
Subject: Re: [R-390] 6080 in place of 6802 - RMS ???

> This is a half wave rectifier. 1/4 the power.
> 120 watts is back to 30 watts.

Just pray that the diode doesn't short out...
Might be a good place for a fuse...

Tom
---------------------------------------------
Tom,

You got it, this sand state stuff can never be trusted.

You know you can not protect the sand state diode with a fuse.
Murphy says the diode will always fail first to protect the fuse.
We just have to live with some risk in our life.

I am using 12BY7 myself for the 3TF7.
I did have a jumper in the socket and used 2 12BA6's for the BFO and PTO.

But a diode poked into that socket would much simpler to install.

I do like the 6BA6 5749 tubes better than 2 12BA6's.
When I when through my last noise reduction drill over Christmas, I
found I had no way to judge the noise of the 12BA6's in the PTO and BFO
circuits. By using the 6BA6's, I was able to select 2 very quiet 6BA6 tubes
and use one in the PTO and one in the BFO. Selecting 6BA6's in the
first IF tube socket for best noise is more sensitive than using the
BFO or PTO socket.

Roger.

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