small valves and RE: OT
ajp166 at bellatlantic.net
Mon Apr 25 12:33:50 CDT 2005
>Subject: Re: small valves and RE: OT
> From: "Dwight K. Elvey" <dwight.elvey at amd.com>
> Date: Mon, 25 Apr 2005 09:38:10 -0700 (PDT)
> To: cctalk at classiccmp.org
>>From: "Allison" <ajp166 at bellatlantic.net>
>>Myself as well. The design of this radio is early 50s. I have a similar
>>circuits from the 1960 RCA tube manual that require only A and B(HT) voltages.
>>However this radio had a battery based on destructive examination and markings
>>that provided 7.5V, 1.5V and 90V. So the likely case is "C" voltage or as
> The 1.5v cell was most likely for the panel light.
>This was common on many of the battery powered sets.
Nope, No dial light. I opened the chassis up and traced the 1.5V.
It runs the audio output 3v5 other half of the filiment.
I suspect they did that to balance the filiment currents.
Odd but, thats the story.
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