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Those are pass transistors used for regulation in the power supply that runs the amp.
The other two MRF transistors are doing the RF amplifier work.
73
Jeff
Ah
Yes now I get it.
I have no idea what the new AM FM Cobra radios are using for the board.
Give it a minute and see if anyone here has played with the new model.
Posting pictures of the board in your radio may help.
And welcome to the group.
73
Jeff
I don't know if you remember The user ' Hook ' but for years he talked on a a99 on a ten foot mast leaning against his garage.
I worked him on SSB many times from CA to TX
73
Jeff
Technically, yes you 'can' use 75 ohm TV coax....
There was a member here years ago that used commercial 75 ohm cable to feed a antenna several hundred feet up the side of a mountain because that's what he had and it was extremely low loss.
But
Your radio and antenna and everything else wants to...
(Translation of above:
I have one that's in the vehicle, great with an FT817ND, and it puts out about 85 watts on HF.)
_
I no longer have mine, I gave it to my younger brother with a bunch of other stuff, it was good for @ 100 watts and very clean on SSB.
73
Jeff
I believe that started in '22 or '23
It was $35 when I renewed couple years ago
It's not bad for 10 years however I would like to see the fees go back into something radio instead of the general fund....
Yeah like that would ever happen
73
Jeff
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