[1000mp] Bad Antenna Relay?

Wed, 15 Oct 2003 09:30:28 -0500

I'm short on time, but I'll throw this out as quick as I can.  My experience 
the first time that this exact problem happened to me, was that it was the 
DSP A/D board.  There is a chip on there that tends to overheat and go bad 
or intermittent.  As I recall, the board has a metal shield around it that 
really heats it up.  The second time this intermittent happened was a few 
weeks ago.  It happened to be a flakey smc cap on the IF board.  I'll have 
to look it up again and I can give out the exact cap.  Remember, most mods 
have to do with the IF board, so we are most likely to do damage there, 
especially when we remove jumpers and install filters.  It puts a real 
stress on the board.  That's what happend to the cap. Pressing on a nearby 
jumper must have cracked it, and as it heated up it became intermittent.

Bill k1xt

>From: "Garry Shapiro" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: RE: [1000mp] Bad Antenna Relay?
>Date: Wed, 15 Oct 2003 01:43:18 -0700
>
>1. The reason the problem keeps coming up is that Yaesu does not deal with
>it.
>
>2. Clearly not all MP's exhibit the problem.
>
>3. In my case, the gain does not come back up by itself.
>
>Garry, NI6T
>
>
>
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]]On Behalf Of Thomas Horton
>Sent: Tuesday, October 14, 2003 5:35 PM
>To: [email protected]
>Subject: RE: [1000mp] Bad Antenna Relay?
>
>
>I've had my MP for quite a while and have never noticed this at all.
>Don't think it is a built in AGC problem.
>73,
>  Tom
>
>Tom Horton
>[email protected]
>"E" Sorter for the ARRL W5 Bureau.
>
>
> > [Original Message]
> > From: Barry N1EU <[email protected]>
> > To: <[email protected]>
> > Date: 10/15/03 00:16:55
> > Subject: [1000mp] Bad Antenna Relay?
> >
> > " . . .the observation is a reduction in gain . . ."
> >
> >
> > Isn't it fun to rehash old ground?  This issue comes up every year or 
>so,
> > and was sometimes referred to as the "deaf rx" problem.
> >
> > So yet again, I offer up my contrary theory that it has nothing to do
>with
> > relays but is a problem with the way the MP controls rf/if gain.  As 
>I've
> > noticed several times on my MP, the receiver can be deaf and then slowly
>the
> > gain comes back up over the course of several seconds while I'm just
> > listening without keying the rig or touching anything.  Which isn't to
>say
> > that I haven't also noticed the gain come immediately back up after
>keying
> > the rig.
> >
> > Yup, the MP has its warts - in particular this deaf rx problem and the
> > recently discussed slow unmuting of fast AGC.  I wonder if the Yaesu mod
> > that Anders spoke of for the latter might help the deaf rx prob also?
> >
> > 73,
> > Barry N1EU
> >
> > _________________________________________________________________
> > Surf and talk on the phone at the same time with broadband Internet
>access.
> > Get high-speed for as low as $29.95/month (depending on the local 
>service
> > providers in your area).  https://broadband.msn.com
> >
> > _______________________________________________
> > List Moderator: Richard Lubash N1VXW
> > 1000mp mailing list
> > [email protected]
> > To Change Options or Unsubscribe:
> > http://mailman.qth.net/mailman/listinfo/1000mp
>
>
>
>_______________________________________________
>List Moderator: Richard Lubash N1VXW
>1000mp mailing list
>[email protected]
>To Change Options or Unsubscribe:
>http://mailman.qth.net/mailman/listinfo/1000mp
>
>_______________________________________________
>List Moderator: Richard Lubash N1VXW
>1000mp mailing list
>[email protected]
>To Change Options or Unsubscribe:
>http://mailman.qth.net/mailman/listinfo/1000mp

_________________________________________________________________
Concerned that messages may bounce because your Hotmail account has exceeded 
its 2MB storage limit? Get Hotmail Extra Storage!         
http://join.msn.com/?PAGE=features/es