Is it some sort of tone generator?
On 2014-03-06 2:26 PM, "Frank Pittelli" <[email protected]> wrote:

> Yes, the three components you listed form an oscillator.
>
> No, it is not an RF device.
>
> Hint: The other tube and variable resistor sit on the "output" side of the
> circuit.
>
> On 3/6/2014 2:14 PM, isaac goldman wrote:
>
>> Maybe its a regenerative but not used as such? Does it detect other rf
>> emissions, like electronic listening devices?
>>
>
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