[1000mp] Bad Antenna Relay?

Tue, 14 Oct 2003 15:46:46 -0700

In my case, I have never observed a TX glitch as you describe. Had I done
so, it would have flagged the coax connector, as I have encountered such
problems before with H/T's.

My suspicion has always been an inadequate relay and, as I said, Yaesu did
replace one. But I do not recall receiving a list of reference designators
of replaced parts--just the bag of parts. So I never knew which relay had
been replaced.

Garry

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of John Tait
Sent: Tuesday, October 14, 2003 3:24 PM
To: [email protected]
Subject: Re: [1000mp] Bad Antenna Relay?

Subject: RE: [1000mp] Bad Antenna Relay?

Perhaps... I was getting an  "hi-SWR" message occasionally...Press the ptt
and all OK again..
On RX, it varied from no RX, to low sig strength to (mostly) perfectly
OK..When it did go quiet, I'd just hit the PTT again, and all would be
fine...'till the next time..
I kept blaming bad antenna connections, bad coax links etc..

John EI7BA

> Thanks for the hint, John---but would you not expect to see even bigger
> problems on Transmit with a flaky connection to the output connector? I
have
> seen no reports of that!
>
> Garry, NI6T
>
> -----Original Message-----
> >From: [email protected]
> [mailto:[email protected]]On Behalf Of John Tait
> Sent: Tuesday, October 14, 2003 11:19 AM
> To: [email protected]
> Subject: Re: [1000mp] Bad Antenna Relay?
>
>
>
>
> Subject: Re: [1000mp] Bad Antenna Relay?
>
> I don't know if the MK V antenna connections are like the MP... If so,
> check the wire connection from your SO239 antenna sockets to the PCB..
> They have a nasty habit of breaking the solder joint on the PCB, creating
>  an intermittant connection, just like a "sticky" relay.
> The SO239 mounting plate is not screwed to  the main back panel, and
> flexes inwards when you push home the PL259 plugs.
> This can break the solder joint....It's a good idea to replace the stiff
> wire
> from the SO239 with a multistrand(and therefore flexible) wire.
>  This is a very common problem on FT1000MPs..
>      GL es 73
>                       John EI7BA  http://www.iol.ie/~bravo/
>
>
> > Paul Franson wrote:
> >
> > > I've got an MP MARK-V - for a while when using antenna A the receiver
> > > sensitivity would be way down when switching from xmit to receive.
> > > Hitting the MOX button once or twice would fix it.  Now it's doing it
> > > on antenna B also - guess I'll have to fix it.  I'd guess it's a relay
> > > with dirty contacts - right?  Where is it?
> > >
> > > Thanks for any tips
> > >
> > > Paul  W2LE
> >
> > Oddly enough, I have experienced a similar problem over the past few
> > days and was just resigning myself to having to dig into the rig when I
> > discovered I had mistakenly twiddled the squelch control when I planned
> > to adjust the monitor level.  Now I have restored the squelch control to
> > its fully CCW position the problem has gone away.
> >
> > I'm sure that won't be what you fellows have done but I'm happy to bare
> > my backside just in case!
> >
> > 73
> >
> > Bob, 5B4AGN
> >
> >
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