The FT-817 PA seems to be prone to overheating.
I have been running the 817 on 13.8V till now, and since it runs fine down to about 9V, I am thinking of finding a 10V regulator to take some heat out of the equation.
Will be looking for a 7810 IC, or possibly using the LM317 for that purpose.
More soldersmoke coming out some time here.
Spark Gaps and Coherers demonstrated and Measured by CuriousMarc
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*CuriousMarc provides a good demonstration of how spark transmitters work
with coherer detectors. His measurements are really illuminating. His
device j...
1 hour ago
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