Carl,
With all your spare time how about coming up with a substitution chart plus
what changes are needed for a wide range of RF devices that are no longer in
production with some unobtainium? This would include VHF/UHF brick amps.
Covering as many as possible, that would be a loooooong chart! And it would keep
changing all the time, as more old parts go out of production, and new ones appear.
I find it more practical to look for suitable replacements just for specific
parts, as needeed. When I do that, I look just at the characteristics of the
original part, and then do a parametric search at some vendor's web site, to
find what parts are available _now_, that meet the requirements.
Manfred
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Visit my hobby homepage!
http://ludens.cl
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