[Yaesu] Ft1kMP loss of receive gain
g3sjj at btinternet.com
Sat Dec 16 09:40:58 EST 2006
Thanks Ty. Well the problem does seem to be further along. I have determined
that the sub-rx is mores sensitive than the main rx but several s-units, so
the fault looks to be in the main rx IF chain. It is not the roofing filter
From: Tyler Stewart [mailto:k3mm at verizon.net]
Sent: 16 December 2006 05:52
To: 'G3SJJ'; yaesu at contesting.com
Subject: RE: [Yaesu] Ft1kMP loss of receive gain
Over the years, I've had several of the small coils in both the LP/HP and
bandpass filters go bad...I'm sure due to excess RF. They seem pretty
fragile. Since I started using RX limiters in the RX line, I havent had any
From: yaesu-bounces at contesting.com [mailto:yaesu-bounces at contesting.com] On
Behalf Of G3SJJ
Sent: Monday, December 11, 2006 4:48 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?
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