3-500Z, etc

[Dick Blaney]

Nostalgiaair has some info on receiveing tubes at this site:
http://www.nostalgiaair.org/NostalgiaAir/Articles/index.htm
Probably works about the same for TX toobs.
73 de
Dick, WB8MHE
wb8mhe at bright.net

-----Original Message-----
From: Multi-Volti Devices <multi-volti at SOFTHOUSE.COM>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Monday, May 24, 1999 2:51 AM
Subject: 3-500Z, etc


>Hello:
>
>Anyone know the details of the procedure for rejuvenating thoriated
tungsten
>cathodes (i.e., 3-500Z in SB-220) when they are well worn?
>
>It's something like filament only at a certain % elevated filament
voltage
>for a certain time.
>
>I'm not looking for K temperatures...I have info on that, but I can
measure
>voltage but not the temperature.
>
>I'd like to read it myself if it's in an article or old ARRL handbook
or
>Bill Orr Handbook.
>
>Thanks
>
>Murray
>
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