[Yaesu] FT1000D

Wed, 13 Nov 2002 03:20:20 +0000

> According to what I've been told, the FT-990 is very similar in RX
> architecture to the 1000D.  The only difference is that it has a triple
> conversion RX and the 1000D is quad.

   The FT-990 was designed AFTER the FT-1000 and incorporates several
substantial improvements.  (It also lacks the second receiver.)
   The most notable improvement is the pre-amp, which is the latest style

and is such a low noise amp., the pre-amp bypass is unnecessary it is 

preceded with a PIN diode attenuator for AGC and the manual RF gain control.

   Additionally the IF conversions were optimized to the point only 3
frequency conversions are necessary for a .1 to 30 mHz reception with NO
birdies with in it's entire range. (self induced tone or heterodyne/s)
   The reason for more than one conversion is not to improve gain, it
is mostly to allow more opportunities for filtering and image/birdie
avoidance.  (which become more necessary with wider frequency operation)
	(I love my FT-990, I use it mostly for CW.)

        73 (= Best Regards) de: Ron [email protected]
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