[ARC5] S=N/N results - suspicions

[Kenneth G. Gordon]

I now suspect that at least one of the reaons I had such a dramatic improvement the first 
time I swapped a 12SH7 in place of the 12SK7 is that there was a pin in the socket not 
making good contact, despite my having put a drop of DeOxit in each socket hole.

I must have missed one.

Subsequent swapping showed no improvement worth considering at this frequency of 2.0 
MHz.

Oh, well...

Ken W7EKB