[Milsurplus] 6AK5 (was Research Help Requested)

[Al Klase]

The way to start figuring stuff like this out is Lud Sibley's "Tube 
Lore." (out of print)

QUOTE:
6AK5, W
A.K.A. (WE) 403A, (WE) 731A, EF95, M8180, DP 61
Miniature sharp-cutoff VHF pentode
Heater 6.3 V @ 175 mA, Gm 4.3-5.1 mili Siemens (WE) (5-27-42), 7BD base
"W" is ruggedized
Variants:  5591, 5654, 5702, 6028, 6096, 6968
END QUOTE

I believe the original design came out of Western Electric radar work 
for IF amps, etc.
Some of the variants have different heater characteristics.

Hope that helps,
Al



On 8/28/2017 3:28 PM, Kenneth G. Gordon wrote:
> On 28 Aug 2017 at 18:44, James Whartenby wrote:
>
>> Ken One tube designed to replace the 6AK5 would be the subminiature
>> 5840, I am sure that there are others.  See:
>> https://frank.pocnet.net/sheets/137/5/5840.pdf Jim
> Although I am GREAT admirer of the sub-mini tubes, the article in question mentioned ONE
> tube to replace the 6AK5, and I'd really like to know what that was. Maybe the 9002?
>
> Ken W7EKB
>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/