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.
Filters: Crystals, LC, Mechanical, SAW, etc.
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*I thought this was an interesting look at filters and crystals. And even
mechanical filters. Remember: Those little SAW containers became the
lapel pi...
20 hours ago
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