[GreenKeys] Frequency Selective Limiter??

[Richard Knoppow]

    I see only one 6V6. However, there are two 6SL7 tubes. These 
were normally used for converter service but were also used in a 
number of volume limiters. Balanced limiters resist low frequency 
parasitics known as thumping. I also think measuring the filters 
would be useful, they might be low and high pass rather than 
sharp band pass filters.
    I wonder if it was part of a diversity system of some sort 
for tone telegraph.
    For some happy hours of time filling you could open it and 
trace the wiring.

On 3/12/2019 7:50 PM, Jeffrey Angus wrote:
> On 3/12/19 9:26 PM, Jim Haynes wrote:
>> Of course it could be totally unrelated to RTTY, could be a
>> volume limiting amplifier for voice communication. 
> I think that's probably correct.
> It has a pair of 6V6 tubes at one end with a three terminal
> strip. And a 3 pin Microphone style connector at the other
> end.
> 
> A pair of 6V6s are good for about 10 watts.
> 
> 

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL