[ICOM] More on my Pro3 pwr issue

[Larry Young]

Chuck: Your problem has been addressed many times on the proIII yahoo group. If you choose to join that group and search their archives you should get lots of ideas about where to look.
Good luck,
Larry K4LXV




________________________________
 From: "KI9A at aol.com" <KI9A at aol.com>
To: icom at mailman.qth.net 
Sent: Sunday, October 27, 2013 10:20 AM
Subject: [ICOM] More on my Pro3 pwr issue
 

OK, need some ideas here, gang. Would like to cover all bases before losing 
my rig for a few weeks at the shop.

My P3 has an intermittent power issue, here is what it  does.  

When turned on, shows 90-100 watts, key down, all bands, into a dummy load, 
and antennas. I hear the fan kick on during xmit. After about 30 seconds 
of cw,  or SSB, the power drops to the following:

160m  8w
80m  40w
40m 30w
20-15-10m 8w

If I leave the rig turned on, it will recover to full 100w in about an  
hour. If I turn it off, it will recover in about 15 min. Which almost leads me  
to think its a poor solder joint, or something other than a failed PA. 

Am I right thinking this???

I did switch out power cords, eliminating the fuse issue. My 50a PS is  
working fine, no drop in current or voltage at any time. All connections are  
tight. 

I have googled the heck out of this. No joy...

Any thoughts? Having a hard time thinking its a bad PA. I guess it can be,  
but, conventional thinking says it either works, or not.

73- Chuck KI9A
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