[Boatanchors] 1625/807 question

[Bry Carling]

Ha !! We ran 807s at  * 1200V DC * in our WS 19 sets in the CCF Nets back in the early 1960s.  "WHISKEY LIMA... SIGNALS!"

(Combined Cadet Force, on around 5 - 6 MHz) a great diversion from school work.


For a rig that is supposed to run at only 8 watts, we made them scream!

Hey - we were 12 - 14 year odl school boys, pushing the envelope, LOL! !


AF4K (Ex-A4941 and G3XLQ)



________________________________
From: boatanchors-bounces at mailman.qth.net <boatanchors-bounces at mailman.qth.net> on behalf of Ron.K3PID <ron.k3pid at sbcglobal.net>
Sent: Monday, February 5, 2018 8:06 PM
To: Boatanchors at mailman.qth.net
Subject: [Boatanchors] 1625/807 question

I am reading some old surplus manuals and find that they like to use the 1625/807 as a power amplifier ( typical ARC-5 parallel style ) and suggest that one could run up to 1000 volts on the plate. Every listing I can find shows a absolute maximum plate voltage for the 1625 of 750 volts. Yes, the operating plate voltage will depend upon class of service and therefor duty cycle but isn’t absolute maximum absolute maximum? Now I can remember pushing the stated maximums a bit and I even have a friend who admits running a tube in a coffee can full of water to get a few more watts out of it.  But none of it was “published” that I know of. What am I missing?


Ron K3PID


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