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Oil-filled caps are the way to go. Just be sure they're not the old ones filled with PCB's...
While I was working around a Collins 208U-3 HF amp in the 80's USAF, the HF power supply freaked under load -- it was only 35 years old at the time. There was a light show emanating from edges of...
A Shure 444 or 444D would sound great on the FT-101ZD, and I have one wired for it.
Presently, I'm using a like new (new old stock) Shure 522 desk mic on my mint Ft-101ZD Mk III. The response curve is the same on this Shure as that of a Heil Gold Line.
Shure 522 picture
Find these...
I've used one at Field Days in years gone by. Drake made this amp to standards few dual 3-500Z makers ever matched, with a few exceptions. A couple of others produced dual 3-500Z amps that were of equal or better quality. Henry made several versions back then that competed.
Even today...
I like the Bird 43 in the "reflected power" reading mode. Or, do you always input sourced RF right to left, and position the 2500W element upside down? ;)
I like you!
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