[Boatanchors] Need 4-400A Plate Cap

[D C _Mac_ Macdonald]

Do an eBay search.  There is a chap who makes caps with a lot more radiating surface that will cool the tube better.  I bought a new but cannibalized Drake L-75 that was missing the 3-500z and the plate cap.



73 de Mac, K2GKK/5
(Since 30 Nov '53)
Oklahoma City, OK
USAF Retired 61-81
FAA Retired 94-10



________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of Doug Hensley <w5jv at hotmail.com>
Sent: Friday, April 13, 2018 09:59
To: boatanchors mailman.qth.net; amradio at mailman.qth.net
Subject: [Boatanchors] Need 4-400A Plate Cap

The 4-400A I have is now missing its  plate cap.  The plate line that comes out from the inside of the tube is 1/8" diameter.  The Eimac plate cap slid down onto this to yield a useable place cap (about 3/8") but also belled out below that to cover the glass to metal seal.


The one in question here had a large finned heat dissipating cap on it but was stuck to the Eimac part.  I gave up trying to separate them and just removed the whole thing.  This leaves me with a 1/8" plate wire sticking up.


If someone has one of these in their parts bin, I would like to buy it or at least pay the USPS on it.


Thanks


Doug W5JV