That sounds like the amp that was at the dumpster during Nearfest in the
80's that I dragged home in my workhorse 85 Dodge 3/4 ton van with the long
wheelbase. Rohn tower sections fit just fine as I was doiing lots of
installs.
Too rough to restore but lots of parts, including PS for a homebrew and the
HK-254's in parallel fired right up for 160-20M AM. Those tantalum plates
loved to glow almost white. Bill Eitel and Jack McCullough left there in 34
to found Eimac and seriously push tantalum plates.
Carl
Ham since 1955
----- Original Message -----
From: "Colin Lamb" <k7fm@teleport.com>
To: "amps" <amps@contesting.com>
Sent: Friday, December 18, 2020 9:01 AM
Subject: [Amps] When did Grounded Grid begin?
My 1940 Radio Engineers Handbook dated 1943, by Terman has an grounded
grid amplifier. It also has a not that the design was called the
"inverted amplifier" and it came from Electronics, Vol 13, Page 14, July
1940.
There is a circuit in my 1937 Radio Handbook that has the meter to measure
plate current in the cathode of a parallel HK-254 amplifier.
So these circuits may be around long before Orr.
Colin Lamb K7FM
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
---
This email has been checked for viruses by AVG.
https://www.avg.com
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|