[1000mp] MKV RX Relay Problem

[Garry Shapiro]

I gathered from your prior email that this also occurs for Ant B. For me,
both inputs have demonstrated the problem. While it is true that it appears
to occur most frequently when I am using the Ext RX Ant, this may be because
much of my operating is on the low bands, and I have Beverages.

Would you send a schematic of your "fix"?

Garry

-----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 4:32 PM
To: All about Yaesu 1000mp
Subject: RE: [1000mp] MKV RX Relay Problem


At 02:53 PM 12/28/2005, Garry Shapiro wrote:
>Symptoms initially were gone, but reappeared within two years, although not
>as frequently, and they are present now.
>
>
>Good luck with solving your problem. I would also like to know which relay
>is involved.

For me the problem does not occur on a TX/RX changeover. It occurs on
an RX ANT / ANT A changeover. Doing a TX/RX so far always fixes it.

Its probably RL1002 which is an ATX203 on the RF Unit, although I'm
not sure why momentarily going TX/RX fixes it. It's also possible it
could be RL6451 which is a TC-112NV

It sounds like from your description that if I fix it by changing the
relay for the OEM one that it will come back. Maybe there is a better
relay to use for "dry circuit" that's pin for pin. A Google search
does not locate their relay specs.

I did come up with an external band aid fix for it today. This will
apply 12V through a 330 Ohm resistor and 1mH choke permanently to the
ANT A input. The 25-30mA of DC current seems to keep the contact clean.

73

Paul - KW7Y

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