[Yaesu] Ft1kMP loss of receive gain

[dsthill]

Hi Chris

As someone who zapped an FT1kmpMK5 about a year ago, I think it's easier
than you think. I hope you were using bandpass filters on this rig. It's a
common mistake I think to not use them in some situations. I think though in
a multi-transmitter setup, it's very important that each rig has necessary
filters. 

I've actually measured 1 to 5 watts at the end of some of my coax cables
when transmitting on another antenna. 

When I did my repair, it was just a single diode or a pair that were bad,
but it was the labour that was "expensive" - $200+ for labout against $5 for
parts!!!!

Hope it's not that bad!!!


Dean - 8P6SH

 

-----Original Message-----
From: yaesu-bounces at contesting.com [mailto:yaesu-bounces at contesting.com] On
Behalf Of G3SJJ
Sent: December 11, 2006 5:48 AM
To: yaesu at contesting.com
Subject: [Yaesu] Ft1kMP loss of receive gain

I am noticing a receive loss of around 10-12 dB. I have checked Antenna 
B and receive antenna inputs. They are the same.

What I do notice is around 2-4 s units difference in indicated signal 
strength between main and sub Rx, which would indicate the problem is 
after the 1st mixer.

We recently used the radio as a spotter in CQWW CW at G5W . Whilst it is 
unlikely, we could have zapped the front end somewhere.

Anyone got any thoughts?

Chris G3SJJ
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