[ICOM] 756 Pro III Problem

[Paul Playford]

Sounds like your power supply is not providing enough current.

My PROII draws about 23 amperes with full output, and requires an RS-35 
power supply or a big battery.  Anything less and I have exactly your 
symptoms.

de Paul, W8AEF

----- Original Message ----- 
From: "Bob Garrett" <rgarrett at suscom.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Monday, July 03, 2006 6:41 PM
Subject: [ICOM] 756 Pro III Problem


Evening Gents:
I thought that before I boxed up my rig and sent it back to Icom, I'd look 
to the
collective wisdom of this group for some help.  I've had my Pro III since 
March of2005.  The output varies from a high of 90 watts on 160 meters to a 
low of 68 watts
on 10 meters.  Is this normal?

Lately, I have been experiencing a problem (only noticeable on CW) where 
when I have
the RF output full CCW, (maximum power) that more than not, I hear a hum on 
the sidetone
and the power drops to anywhere from 8 to 11 watts output.  Also, sometimes 
it does
that for a moment and then just turns off and I have to wait ten seconds 
till the
rig comes on again.
Now, I've checked the usual suspects, tight grounds, lose coax fittings etc 
and everything
checks out.  I suspect the high SWR protection circuit is not working 
correctly.
The only challenge is that this often happens when I have a flat SWR of 1 to 
1.
Any help appreciated and hopefully, I sufficiently articulated the problem. 
Thanks
in advance for the help.
73, Bob K3UL
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