[ICOM] 781 "raspy"sound

[D C _Mac_ Macdonald]

That is a typical symptom of bad polystyrene variable trimmer capacitors in the VCO circuits. It is a common problem from the IC-735 (at least) on for many rigs. Eventually, each band of the VCO will fail to lock in and effectively go dead. 
 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* Oklahoma City, OK * 
* USAF, Ret (61-81) * 
* * * * * * * * * * * 
 
 
> To: icom at mailman.qth.net
> From: bonddaleena at aol.com
> Date: Thu, 26 Dec 2013 10:30:17 -0500
> Subject: Re: [ICOM] 781 "raspy"sound
> 
> Jim, considering the age of your radio, you should be thinking about replacing the caps. Although not out of the question, I would suspect a cap failure MUCH more than an inductor.....
> 
> ron
> N4UE
>  
> 
> -----Original Message-----
> From: Jaime Gomez <cwdx.hk1n at gmail.com>
> To: ICOM Reflector <Icom at mailman.qth.net>
> Sent: Thu, Dec 26, 2013 9:05 am
> Subject: [ICOM] 781 "raspy"sound
> 
> 
> My old 781 is starting to sound "raspy" in both Tx and Rx, specially in 15
> and 10 meters.
> I have found a recommendation to replace L11 and some other components in
> the reg board.
> L11 is an LW-15 type choke, I cannot find any other description regarding
> inductance value.
> Anybody knows where I can get the specs or buy a type LW-16 type to impreve
> reliability?
> 
> 
> Thank you, appreciate any help, happy new year
> 
> -- 
> 73,
> Jim, HK1N
> 
> President DXARC - DX Colombia Amateur Radio Club
> *Malpe**lo Isl. HK0TU 1990 & H**K0NA 2012 Team Member/ hk0na.com
> <http://hk0na.com/> *
> Araucaria DX Group