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RE: Max anode voltage?

Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>

Hi guys, I do not have a way to post pictures but if someone would like
me to take a picture of an 957 acorn tube in it's socket, I could send
it to someone who can post it. I have it on my desk right between a
4-1000 and a 832.

Rich , from the middle of Missouri

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Friday, May 19, 2006 6:16 PM
To: tesla@xxxxxxxxxx
Subject: Re: Max anode voltage?

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

Original poster: olivaw@xxxxxxxxx
On Fri, 19 May 2006 10:29:31 -0600, you wrote:

 >Probably have to go a bit farther back to find acorn tubes.  I think
 >that acorns were used in aircraft transponders at 1GHz.

They were used in a primordial radio altimeter that worked at the
astoundingly high frequency of 450 MHz (erm... Mc/Sec).

And some sort of lighthouse tube was used at around 1Ghz for an
"Information Friend or Foe" transponder."

    Somewhere around here I have the remains of a radiosonde I found
on the desert which has a tube which looks like a 958A but no label
(or much else left) when I found it.  Also have one with a 3A4 and
others with 5703's and the RCA cavity oscillators.  Wonder if anyone
has ever compiled a history of radiosonde development?

    Wasn't the "acorn tube" altimeter the APN-1?  The APX-6 IFF
transponder I have uses a 2C44 (not the more common 2C43) lghthouse
tube in the output stage but I'd have to look at it again to see
what's used in the receiver.