[1000mp] MKV RX Relay Problem

[VE3QN]

I have not had the problem with my new FT1000MP MkV Field. Fortunately, I've 
always routed my antennas through an antenna switch which grounds the inputs 
when I'm not using the transceiver.

That said, I do have an external wire antenna connected to the RX input. 
While it passes through a lightning protector it is otherwise always 
connected. What further precautions should I take to protect the receiver (I 
do disconnect it during lightning storms and when I'm away)?

Bryan  VE3QN

----- Original Message ----- 
From: "Rod Elliott" <ve3irf at sympatico.ca>
To: <mailbox at otterbein-inet.de>; "All about Yaesu 1000mp" 
<1000mp at mailman.qth.net>
Sent: Thursday, December 29, 2005 9:43 AM
Subject: RE: [1000mp] MKV RX Relay Problem


> 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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>
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