[RFI] RF Feedback - FL7000 AMP

Don Moman VE6JY ve6jy.1 at gmail.com
Wed Aug 19 07:57:03 PDT 2009

It's not an RF feedback issue.  The FL7000 is super touchy on overdrive in
SSB and you need to do the mods to desensitize the protection circuitry.
The unit I have, it was imposible to get near rated output without it
tripping.  After the mod, it behaves fine - and can still trip if there is a
"real" reason for it to trip.

73 Don

On Wed, Aug 19, 2009 at 7:51 AM, Tony <dxdx at optonline.net> wrote:

> All,
> I have what seems to be a unique situation with a Yaesu FL7000 solid state
> amplifier. The protection circuit trips for no reason in SSB mode, but
> works
> fine on CW and digital modes.
> The protection circuit is supposed to trip when SWR is high and that is not
> the case with my setup. Again, it works fine and keys to full output in CW
> /
> FSK modes.
> I was told that it could be a microphone RF feedback problem, but before I
> clamp on a bunch of torrid on the Heil mic cable, I was wondering if anyone
> had this problem and what it took to fix it.
> Thanks,
> Tony -K2MO
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