[ICOM] Icom PW1 Failures - How To

[Adam Farson]

Hi Troy,

You will need to set the 756Pro3 RF output to at least 60W to initiate an
ATU tuning cycle in the PW1 with the HPA stage off-line. After tuning, you
can of course turn the Pro3 RF Power control back to the output level you
normally use for PSK31 etc. Unfortunately, there is no way around this.

I mentioned the 60W minimum in a previous posting on this topic.

The Yaesu Quadra (which I have in my station) is similar in this respect; it
requires at least 75W drive to tune up.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Troy L Davis
Sent: 09 June 2005 07:55
To: ICOM Reflector
Subject: RE: [ICOM] Icom PW1 Failures - How To

This subject is of great interest to me because I have never been able to
get my PW-1 to auto tune its internal tuner when the PW-1 was not powered
on.  I operate almost exclusively these days on PSK 31 with only about 20
watts so the PW 1 is just sitting there doing nothing but showing the green
lights.  If I try to tune the PW-1 with it's power off, nothing happens.. 
it does nothing.. If I add some drive from the 756PRO III it still does
nothing when the tuner is pressed at the power levels I am running.. My
hunch is that it requires more drive to auto tune on or off that I am
willing to put through the 756 running audio / digital modes.. if I turn the
PW-1 on, adjust the 756PRO  III power knob to max, (it's normal position for
SSB, CW, etc..  and press the PW-1 tuner it of course turns on the 756 and
gets it's necessary drive signal plus the CIV band signal and all works
fine..
You may be asking well, so how do I do tune it.. simple I put the 756 on
line, turn the AMP on, Tune and then turn the amp off and only run the 756..
but frankly, I have thought all along that was a rather Micky Mouse
approach..
any other suggestions would be greatly appreciated.. I just did the entire
install , recalibrate the ALC, and checked all the functions and they work
as expected except for the tune while turned off as described on page 14 of
the manual..

73 , Troy , W4AJJ



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