[Top] [All Lists]

[Yaesu] FT-1000MP and DVS-2

To: <yaesu@contesting.com>
Subject: [Yaesu] FT-1000MP and DVS-2
From: grt@nauticom.net (Bob Thacker)
Date: Wed, 23 Jul 1997 08:09:59 -0400
morel grunberg wrote:
> That's true: it's a design problem cured by Yaesu as follows:
> 1. On the transceiver AF unit: change the R-3161 chip resistor
>    from 1K to 4.7K ( for the "D" ); for the "MP" you have to find
>    the similar resistor.
> 2. On the DVS-2 unit :
>    * on the top side of the board make an etch cut between C-1003
>      and Molex connector J-1001 ( it's a very tight space ).
>    * connect a 5.6K resistor from C-1003 nearest end to J-1001
>      pin 6.
>    * on the bottom side of the board, make an etch cut on the
>      trace placed at abt 1'' from the upper/rigt side of the J-1001
>      solded pins.
>    * add a 5.6K resistor across the etch cut you just made.
>    * add a 5.6K resistor from the J-1001/Pin 5 to the nearest
>      ground trace.
>    * add a 5.6K resistor from J-1001/Pin 6 to the nearest ground
>      trace.
> If you have a fax, I can send you the drawing. I'm looking
> myself for the DVS-2 schematic diagram and wiring.
> 73 de Morel, 4X1AD
> Tyler Stewart wrote:
> >
> > Bob Thacker wrote:
> > >
> > > Just got my second DVS-2. Both units seem to overdrive the MP, almost
> > > like the ALC doesnt work. It crackles and distorts on voice peaks. The
> > > MD100A8X does no such thing, nor does the stock mike. Anyone have
> > > similar experiences? A call to Yaesu technical department mentioned that
> > > there could be a problem in the interface inside the MP.
> > >
> > > Thanks,
> > > Bob
> > > K3GT
> >
> > That is an engineering defect.  As far as I've heard, they all do
> > that.   There is a mod available from Yaesu that should improve things,
> > but I dont think it's a complete cure.  Instead of curing the problem in
> > the MP, they decided to modify the DVS2.  It's addressed in Application
> > Note AN-94907 from Yaesu.  I never did the mod, so I dont know if it
> > really cures it or not as I decided to sell it to a 990 user instead.
> >
> > 73, Tyler K3MM

Thanks Morel for the offer. Work fax is 1-412-766-1812. This is a dual
voice fax business line that a real person answers, stay on the line and
the person will start the fax...not real high tech yet.

Do not have a schematic as yet, but, am calling Yaesu today to get the
official position...hopefully I can get a schematic of the DVS-2.

Universally on the D, MP, 990, etc ALL have this same problem. Yaesu did
it again!

Will post any updates on the reflector


FAQ on WWW:               http://www.qsl.net/k7on/yaesu.html
Submissions:              yaesu@contesting.com
Administrative requests:  yaesu-REQUEST@contesting.com
Problems:                 owner-yaesu@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm

<Prev in Thread] Current Thread [Next in Thread>