Thanks Steve for that information.
I actually have quite a few of those those Ceramic Sockets in EF Johnson. I
was fortunate enough to get a substantial collection of various QRO parts
directly from the estate of the Amp Man himself Bill Orr W6SAI (rest his soul)
in Palo Alto. I always liked the other plastic sockets because of their super
air flow capabilities around the pins.
Best Regards,
73, de Pat Barthelow AA6EG
> Subject: RE: [Amps] Chinese Made Bakelite or mystery material 3-500Z sockets
> Date: Tue, 27 Apr 2010 14:37:18 -0700
> From: stevek@jmr.com
> To: apolloeme@live.com; amps@contesting.com
>
> I guess you know RF Parts has #275-TAY which is ceramic and a copy of
> the E.F. Johnson #275 that so many commercial houses used for many
> years...?
>
> WB2WIK/6
-----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]
> On Behalf Of Patrick Barthelow
> Sent: Tuesday, April 27, 2010 2:30 PM
> To: amps@contesting.com
> Subject: [Amps] Chinese Made Bakelite or mystery material 3-500Z sockets
>
>
> Folks,
>
>
>
> Still scoping current sources for Amp Parts. Found a Chinese maker of
> the classic,
>
> bakelite sockets, that are particularly effiicient at getting free flow
> air around the tube
>
> pins. I also remember some years ago a story of some kind of 3-500Z
> socket of dubious heritage that had a problem when the alloy pin
> contacts were weak and caused problems with the high current filament
> pins.
>
> Does anyone know if the Chinese made bakelite sockets are of good
> quality?
>
>
> Best Regards,
> 73, de Pat Barthelow AA6EG
>
>
>
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