2C52 datasheet

[Emmanuel K]

Hello,

Does anyone has a complete datasheet of the 2C52 tube ?
I searched but found nothing, just an incomplete Raytheon document.

Thank you

[jlsem]

I believe it is a 12.6V only version of the 12AX7.

John

[ke4mcl]

i have one in front of me and its no 12ax7. its an octal, very similar in appearance to a round plate 12SL7. i have over 8k tubes and the two i recently got are the first i have seen. i too am searching for data on it.

[tubelab.com]

I had over 100,000 tubes at one time. Most were military surplus. I have never seen a 2C52, but I do have several "specials" that fit the description.

Google found this:

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 12.6 Volts / If: 0.3 Ampere / -: Indirect /
Description High-mu double triode. Mu 100. Designed for aircraft servo-amplifiers.
GE, Raytheon and Sylvania among known manufacturers.
Tube prices 0 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973
- - Manufacturers Literature
Tube Lore, Sibley, USA 1996


Google also found several 2C52's for sale.

[Tom Bavis]

Tube Lore says base is 8BD (same as 6SL7). Close to a 12SL7.

[Emmanuel K]

Thanks for the inputs, yes 2C52 is 8BD, same pinout as 6SL7/ECC35, 12SL7, etc. mu=90

It will be used in a diy project with two tubes connected in SRPP so if someone knows what is the filament-cathode limit..

Maybe 90V like a 12SL7

[jewel942]

Specs similar to 12AX7, but in octal package as has been noted. I have a bunch of these, may try them in place of 12AX7s in a couple preamp projects. The links below show slightly different specs - some are the same.

http://tdsl.duncanamps.com/pdf/vm345.pdf (shows same as 12AX7, mu = 100)

http://www.wps.com/archives/tube-dat...-56-40M/12.JPG (shows mu = 90)