[BC] Dud 4CX20,000 and the FM25K?

[Alex Hartman]

I've just recently done the mod on a FM25k using a VS1 as the exciter
and IPA. It's a pretty easy trick provided the rest of the box is
okay. I'd suggest replacing every chunk of coax in the thing however.
I found a lot of the original ones to be just junk. I also left the
original IPA divider network and modules installed per Harris support.
Something about airflow... ;) I left everything in the box, iron and
all, just unhooked the breaker from the front panel and put a toe tag
in there saying why it's unhooked for the next guy.

A VS300 will be running balls out, and possibly not enough headroom.
The VS1 gives me a 1kW backup box as well. (My FM25k is only running
at 18.2kW and i needed about 295w of drive out of the VS1 to make
power (the original spec is 340w into the PA).

I'm sure you can get close to 25kW, if not just a little short with
only 300w of drive. But i wouldn't stress something that doesn't need
to be...

--
Alex Hartman