[ICOM] IC-718 that dies on 30m, revives, dies again

[D C *Mac* Macdonald]

If I recall, the Kenwood TS-120 rigs had a problem
with self-oscillation in the final amp stage when
they first came out.  I think the fix was quite
simple, though.
 
It might be worth a call to Icom.


* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
* U.S.A.F., Retired *
* * * * * * * * * * *

 
 
From: jwfuller at verizon.net
To: icom at mailman.qth.net
Date: Sat, 19 Jun 2010 20:47:36 -0400
Subject: Re: [ICOM] IC-718 that dies on 30m, revives, dies again

Herman, Jack and Frank,

Thanks for your thoughts and suggestions. The
antenna and coax are a good place to start, and
I'll confess the coax is quite old and could be
the culprit. I also have to confess I've never
heard of power amp oscillation so if that's the
problem, I'm going to have to ship it off to Icom.

In addition to the Icom's internal SWR meter, I
also have an external SWR meter, and they both
jump all the way to the right. As one of you said,
it could be the transmitter jumping off frequency.
Or it could be the antenna.

I'll try out your suggestions and will file a
report here later.

Thanks, all. 

73,

John K4HQK