[ICOM] 781 "raspy"sound

[bonddaleena at aol.com]

Jamie, glad you took my 'suggestion' without flaming me! ha ha

I have a LOT of Icoms. The older ones, do have problems with lousy caps. I wondered if you have looked at Icom's Technical database?
It has a lot of good info there. I have had problems with caps in both my 761 and 745.
If you want to get into the 'test' mode, you can buy some great cap ESR testers. These will test small, electrolytic caps 'in circuit' without damaging and other devices.

I have a large restoration shop (specialize in boatanchor restorations). I have many (too many, actually) cap testers. Most of these older caps will show high ESR and cause problems. There are several companies that sell cap 'replacement' kits to replace these problematic caps.
When I was a PE with IBM, caps always had a much higher failure rate compared to other components..... I actually wait until I have a 'bucket full' of caps before I toss 'em. ha ha

Have fun.

ron

 

 

 

-----Original Message-----
From: Jaime Gomez <cwdx.hk1n at gmail.com>
To: ICOM Reflector <icom at mailman.qth.net>
Sent: Fri, Dec 27, 2013 6:29 pm
Subject: Re: [ICOM] 781 "raspy"sound


Hi Ron, thank you for your suggestion, of course recapping the Reg board is
among my tasks, but as I saw that Icom recommends to replace L11 with an
LW-16 I would like to do it because it does not look good, seems it has
received a lot of heat.



On Thu, Dec 26, 2013 at 10:30 AM, <bonddaleena at aol.com> wrote:

> 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
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
>
> ----
> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>



-- 
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
----
Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/
To support QSL/QTH.net: http://www.qsl.net/donate.html