[1000mp] MKV RX Relay Problem

[Rod Elliott]

Thomas...

Interesting observation!

I have had the famous rx de-sensing problem with both my MPs and also 
their predecessor, an FT-102.  Then, 3 years ago I re-configured my 
station to ground the MP antenna through an external switch when not 
operating. Since then... no more rx de-sensing!

Tnx , 73, HNY
Rod Elliott, VE3UW



At 10:29 12/29/2005, you wrote:

>[snip]


>, but I disconnect now the antenna via a external antenna
>
>switch from the transceiver, when I'm not operate it.
>
>I believe, that may be electrical loadings from the antenna damaged the
>relays over the time.
>
>
>This issue is a real weak point of the MkV. And as I read long time this
>list, it happen quite often.
>
>
>Have a nice day....and a good an successful New Year!
>
>73 de Thomas
>DG8FBV
>---
>www.dg8fbv.de
>
>
> > -----Original Message-----
> > From: 1000mp-bounces at mailman.qth.net
> > [mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Garry Shapiro
> > Sent: Donnerstag, 29. Dezember 2005 07:35
> > To: All about Yaesu 1000mp
> > Subject: RE: [1000mp] MKV RX Relay Problem
> >
> >
> > It could well be that different relays are intermittent in
> > different radios. I have never been able to conclusively
> > isolate mine, because it always occurs when operating!
> >
> > -----Original Message-----
> > From: 1000mp-bounces at mailman.qth.net
> > [mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Paul Baldock
> > Sent: Wednesday, December 28, 2005 5:53 PM
> > To: All about Yaesu 1000mp
> > Subject: RE: [1000mp] MKV RX Relay Problem
> >
> >
> > At 05:18 PM 12/28/2005, you wrote:
> >
> > >Would you send a schematic of your "fix"?
> >
> >
> > So far this only occurs when I go from RX ANT to ANT A /B,
> > and the sensitivity is decreased on ANT A/B, hence I'm trying
> > to pass DC current through the ANT A/B contacts not the RX
> > ANT contacts. If you have intermittent reduced sensitivity on
> > the RX ANT position then that involves different contacts.
> >
> > I've just tested it with clip leads on the bench so far. I
> > can't see any down side to applying a little DCI to the MKV
> > ANTA/B terminal. I will put it in an RF tight box in a few
> > days and test it out.
> >
> > Paul
>
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