[Boatanchors] 0A2 and 0B2 in Parallel?

[eugene at hertzmail.com]

Ahh. You guys are of course, correct. I misread the diagram. They are providing two different voltages, +150 and +105. My bad.
 
Here's the diagram of the PS if anyone is interested. 
http://www.hertzmail.com/to-keyer/to-ps.jpg
 
Eugene
 

________________________________

From: J. Forster [mailto:jfor at quik.com]
Sent: Fri 2/20/2009 3:49 PM
To: eugene at hertzmail.com
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] 0A2 and 0B2 in Parallel?



Are you SURE they are wired in parallel? Maybe back to back ?

Parallel makes no sense at all. They are different voltages:

http://scottbecker.net/tube/sheets/155/0/0A2.pdf

-John



> Hi there. I just acquired a very nice Hallicrafters HA-1 TO Keyer. I was
> reviewing the circuit diagram from Bama and saw in the power supply, a 0A2
> in parallel with a 0B2.  I am assuming that they are paralleled to permit
> more current to pass, but why not use two of the same?  What is the
> difference between these two tubes?
>
> Thanks in advance
> Eugene




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