[Milsurplus] BC348 - Q model question

[Jim Whartenby]

John?
The cathode is a low impedance circuit (750 ohms compared to 80K for G1) so I would think that measuring there would have less an effect on the frequency stability of the oscillator.  
See definition of Logic below!Jim
Logic: Method used to arrive at the wrong conclusion, with confidence.  Murphy 

    On Sunday, September 21, 2025 at 12:30:19 PM CDT, jphutch60bj <jphutch60bj at gmail.com> wrote:   

 Specific to BC348-Q  converter tube VT150 aka 6SA7.

To sniff out the actual frequency being generated by the Local 
Oscillator circuit, would that be best measured from the Cathode pin #6 
or from the Grid 1 pin #5 ?

Don't want to shift the frequency, or at least minimize it, through a 
25pF  cap to my frequency counter?  Grid or Cathode to ground?

I  need to see ~15mV for my counter to work.

Thanks for your 2 cents.



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