[Yaesu] Yaesu Digest, Vol 38, Issue 10

[dgmaley@inav.net]

I had a similar problem with my 1000D.  But it was only 
with very
strong signals.  Ended up finding the Tx PIN diode was 
leaky and
messing up the input to the receivers.  Replaced it with a
1N4007 power supply diode.  It's been fine since.
Check the diodes towards the front end.  I actually found 
it with
just an ohm meter.
Dave  WA0ZZG


On Fri, 17 Feb 2006 13:08:35 -0500
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>Today's Topics:
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>   1. MkV RX Problem (Charles Bibb)
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>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Thu, 16 Feb 2006 15:53:33 -0600
>From: Charles Bibb <zedkay at bellsouth.net>
>Subject: [Yaesu] MkV RX Problem
>To: yaesu at contesting.com
>Message-ID: 
><5.1.0.14.0.20060216153305.009f3280 at mail.bellsouth.net>
>Content-Type: text/plain; charset="us-ascii"; 
>format=flowed
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>
>Hi, All
>
>Got my Mark V back from Yaesu service about two weeks 
>ago. Had no power 
>output after a nearby lightning strike. Turned out to be 
>a few blown diodes 
>and caps; relatively minor. Turn around time was almost 
>exactly 2 months.
>
>Now, however, I'm noticing a new problem, this time with 
>the RX. When 
>strong signals are present, I hear copies of them at 
>11-13 khz above and 
>below the actual signal. Usually it is at 11.6 khz either 
>side of the real 
>signal, but varies a little by band. It is present when 
>using any of the RX 
>antenna jacks, "A", "B", or the separate RX antenna jack. 
>I've eliminated 
>any external devices in the line as the cause, so it's 
>definitely happening 
>inside the Mark V.
>
>Does anybody know what this is?
>
>This screwy RX behavior did not occur before the TX 
>failed, but may have 
>been present when I sent it out to Yaesu. I was so 
>involved with the TX 
>problem that I didn't do any rigorous checking of the RX 
>because it seemed 
>fine just tuning across the bands. Just in case, I asked 
>Yaesu to check out 
>the RX and they said they checked and aligned it and that 
>everything was 
>fine. This, however, it NOT fine.
>
>I first noticed it on 20 meters SSB while working the 
>3Y0. I was using dual 
>RX at the time and began hearing some of the stations 
>calling the 3Y in the 
>LEFT earphone. Now, I know the audio from both the main 
>RX and sub RX is 
>mixed, with the main appearing mainly in the left 
>earpiece and the sub 
>appearing mainly in the right earpiece (the way I had the 
>menu set), but I 
>was hearing the calling stations in BOTH. After further 
>checking on CW, I 
>found what was really happening. Filter positions don't 
>seem to affect 
>it.  Receiver performance seems fully up to specs, except 
>for the "extra" 
>signals. Curiously, it doesn't seem to happen on 160 or 
>80. I have heard it 
>on 40, 20, 17 and 15 meters.
>
>Has anyone else had this problem?  Am I about to have to 
>ship it back to 
>California?
>
>Thanks,
>
>Charles - K5ZK
>
>
>
>------------------------------
>
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>End of Yaesu Digest, Vol 38, Issue 10
>*************************************