[Yaesu] Re: Pin Diodes FT-990 and FT-990 HISS

Tue, 12 Feb 2002 04:22:00 -0500

Stuart Rumley wrote:

> This hiss is a common problem with the Yaesu FT-990 and FT-1000.  For this
> radio it is the limiting factor on sensitivity excluding secondary factors
> such as local oscillator phase noise and intermodulation distortion from
> adjacent high level signals.

   I just tested this, I hear NO noise or any sound, my FT-990 was
at Yaesu in Cal. just before I bought it from an OM, Yaesu must
know how to cure it. I was lucky, the OM had it serviced and
upgraded because he could no longer drive his power amplifier to
full power, I am glad I bought his external power supply,
that was the problem.

  (A pass transistor shorted out, he replaced it, but didn't notice 

the BASE wire going to that transistor was melted off of the socket,
so the 13.8 was drooping under max load)

       73 (= Best Regards) de: Ron [email protected]
    100% LINUX, 100% of the time.   SENT Time and Date are UTC
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