[NJARC] '52?

[n3ibx]

Steve,
         A "52" is a tetrode, and a  "852" is a triode. It was also known as 
a UV-852, a "75W" triode that came out about 1928. They were quite 
revolutionary at the time since you could make them work on the higher 
frequencies like 20 or 10 Meters.

A 852 was sometimes called a "52" for simplicity sake, but had nothing to do 
with a real #52 tetrode.

Regarding a "special" 52, I'm not familiar with anything except maybe a 
VT-52, which is very different from a UV-852.

I'm not sure what the filament material on a UV-852 was, but would take a 
guess that they used a thoriated tungsten filament.

Best Regards,
                     Joe Cro N3IBX


----- Original Message ----- 
From: <StephenTetorka at cs.com>
To: <njarc at mailman.qth.net>
Sent: Thursday, March 16, 2006 7:22 PM
Subject: [NJARC] '52?


> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Is an " '52 " and 852 tube?
>
> Were "special '52 tube made"...what was special?
>
> Were there any with just Tungsten wire for the filaments?..or is this
> 'standard'.
>
> Tnx,
> Steve
>
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