[ICOM] IC-746PRO

[Gary P. Fiber]

Make sure the power supply connections are nice and tight if that does 
not work change out the power supply with another known good supply.

What does it do without the tuner enabled into a dummy load?

Have you any items in between the radio and antennas / dummy load like 
an antenna switch, coaxial jumpers?

Any fellow amateurs nearby you could move your rig to their station to try?

I will say with 11 years doing that tech support job at Icom it was 
sometimes pretty hard to decipher and provide an exact answer to all 
questions that came in.
Some things we had not heard of or could put our finger on the answer. I 
sure tried though.

Gary K8IZ


 
Richard Turensky wrote:
> I'm having a problem with my IC-746PRO.
> While tuning into a dummy load the power
> output fluctuates up and down.  Some times
> it goes to full output then drops down to
> about 50%.  Other time it puts out 50% and
> then jumps up to full output.  The ALC bar-
> graph also fluctuates.  It is the same on all
> bands including 2 meters.
>
> I've tried different coax with same results.
> Also acts the same way into my R7 vertical antenna.
>
> I emailed Icom tech support and all they said was the
> fluctuating ALC meter shows the ALC is working!  So that makes
> me leery of sending the radio in with that response.
>
> The radio has had the ubiquitous "No Transmit" repair done
> by Icom after the first month I owned it.
> I tried loosening and re-tightening all the screws.
> Also tried cleaning all the ribbon cables and then
> it worked fine for a couple weeks then back to the
> same problem.  Any ideas?
>
> Thanks, Dick K9SSB
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
>
>