That is one cool power tetrode you've got there, Nick. The datasheet
alone would make me want to build a linear amplifier around it if I had
one. 500w CW at up to 60mhz and 335w to 175mhz? I have no idea how
difficult it is to tame the self-oscillations at the higher frequencies
on that tube, but 300w of input power (keydown CW) on 2m band is pretty
impressive. Depending on the efficiency of the amplifier, might be
enough to work some moon bounce, with a decent antenna setup. How many
of those do you have?
-Adam W7QI
On 3/7/2013 5:58 AM, Nick wrote:
...bit more on this - many years ago I went a bit mad and bought a
large quantity of tubes, many in big batches where there might have
been a tube or two of interest.
I bought one batch simply because I saw "NIB 7094s" mentioned in the
list - turned out they weren't quite what I expected - they were not
"National" or "Burroughs", they were "RCA". Odd, I thought... bought
the lot at auction for just a few pounds...
When the boxes arrived, turned out that they were not nixies at all,
but beam tetrodes - rather cool looking ones at that -
http://www.mif.pg.gda.pl/homepages/frank/sheets/079/7/7094.pdf - Turns
out they are quite a desirable RF and audio tube...
Moral: Be careful when buying "Blind" - you may well not get what you
were expecting.
If anyone wants, I'll photo the three variants together - Burroughs,
National and... the RCAs !
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