KF0FX@aol.com wrote:
>
> I have a brand new, right out of the box, Western Electric CW 701A.
> Guaranteed for 250 hours (says right on it). It's a strange looking tube with
> the anode wrapped around four oxide cathodes at the perimeter of the tube.
> The large cathode to anode surface area makes me think that the tube was
> designed for low duty cycle and high current pulses. It doesn't look like it
> was designed to handle heat. The large and variable cathode to anode spacing
> implies that the tube was designed for low frequency operation. Does anybody
> have an idea of what this tube is? It looks like it would make a good base
> for a lamp. :-)
>
> 73's
> Chris, KF0FX
> KF0FX@aol.com
What you have there is a radar pulse amp tube that was once very
plentiful on the surplus market. It has a high inter-electrode
capacity, but was used in home-brew PA applications up to around 20 mx
or so. With 2kv on the plates, you could run up to 400 ma on ssb peaks
with a pair of the tubes. Since they were $5 or so apiece, you could
afford to abuse them a little. More information can be obtained from
the "new Sideband handbook" by Don Stoner published by CQ back in the
late 50s. I guess the short answer is, "Yes, it would make a nice
lamp."
--
Ken K4XL
grimm@lynchburg.net
Boatanchor Manual Archive - ftp://198.28.36.115/pub
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