[1000mp] MP Receive Problem

Mon, 27 May 2002 13:53:18 -0400

I've had the problem on my late '99 MP on two completely different linears 
(Ten-Tec Centurion and Alpha 99) that I purchased new, so I'm convinced it 
is not the linear - this problem is internal to the MP.  But it is 
interesting to consider that both linears were keyed using the TX GND and TX 
INHIBIT signals on the Band Data jack.  It is possible that the problem is 
in MP circuitry associated with those two lines, i.e., in the 
transmit/receive changeover logic.  Has anyone seen the problem and not 
controlling their linear with those control lines or while running barefoot?

I initially thought the problem was in my Ameritron remote antenna switch.  
I am convinced it is internal to the MP, and as I said previously, occurs on 
both A/B antenna inputs even though the B input had hardly ever been used 
before.

73,
Barry N1EU

>From: "Bill Rinker" <[email protected]>
>Reply-To: [email protected]
>To: <[email protected]>
>Subject: [1000mp] MP Receive Problem
>Date: Mon, 27 May 2002 09:57:49 -0600
>
>My FT1000MP was purchased in 1995.  I had no receive problem running
>barefoot or with my previous Knw TL-922A Amp.  In February of this year I
>replaced the Knw TL-922A with a new Ameritron AL-1500.  I immediately
>started to randomly incur the attenuated receive signal problem which could
>be corrected with a "dit" or pressing the PTT switch.  Without the linear,
>running barefoot, the attenuated receive problem disappeared.
>
>In checking with Ameritron they advised the following, quote:  "Try using a
>dollar bill to slide between the contacts of the T/R relay.  There may be
>some residue on the contacts causing the problem."  That solved the 
>problem.
>
>Hope this helps!
>
>Bill - NE9Z
>
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