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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 19th Feb 2007, 8:26 pm   #1
earlytv
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Join Date: Apr 2005
Location: Racine Wisconsin USA
Posts: 14
Default GEC 4081A CRT Pinout?

Can anyone post pin out and data on a gec 4081?

Thanks
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Old 3rd Mar 2007, 8:12 am   #2
dazzlevision
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Default Re: GEC 4081A CRT Pinout?

Hi,

GEC valve manual, part 1, Aug 1957, edition 2 states:

4081 and 4081A use a B9 base, with the following pinout:

1 = X1
2 = Y1
3 = A2
4 = H, K
5 = H
6 = G
7 = A1,3
8 = Y2
9 = X2

The indexing pip is between pins 4 & 5.

Looks like an oscilloscope tube, with a screen diameter of 2.75", green phosphor, 4V @ 0.8V heater, 80 - 200V A1 volts, 400 - 800 A3 volts, -30V max G1 cut-off (max), deflection sensitivity (mm/V) X = 150/VA2; Y = 150/VA2.

Hope this helps.

Regards,

Dazzlevision
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