[Test-Equipment] Old GR Crystal Test Set

[Dale H. Cook]

At 02:32 AM 10/3/2004, J. Forster wrote:

>I have an ancient General Radio Type 275 Piezo -Electric Oscillator.  It's an
>instrument with a one tube
>circuit that ran on batteries in a wooded box about a foot square.  I  would
>like to find a manual or at least the part number (tube number) of  the 4 pin
>vacuum tube that went into it.

It is listed in Catalog F (June, 1930). The tube is a UX-112A. Batteries 
needed are three 1.5 Volt cells for the filament and two 22.5 Volt 
batteries for B+.

Dale H. Cook, Chief Engineer, WWWR Roanoke VA, WCQV Moneta VA, WKBA WZZI 
Vinton VA, WKPA WLNI WZZU Lynchburg VA, WMNA/WMNA-FM Gretna VA, WOWZ 
Appomattox VA
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