On Aug 25, 2006, at 10:08 AM, McGrane wrote:
I should explain my setup here;
FT8800 dual band FM rig for recieve 8 element yagi with mast mounted 18 db hamtronics preamp 25 feet of 9913 coax
Hasn't the FT-8800 been shown by some folks to have a "barn-door" wide receiver? I can't find the link for any real lab reports on it at the moment, and all the manufacturer's put on their brochures these days are the same numbers for just about every radio... .2 uV for 12 dB SINAD, etc... etc... etc... no real good specifications on how they perform with lots of off-frequency noise and or other crud.
Putting a high gain pre-amp in front of it without some bandpass filtering is likely just crushing it. Can you see how it performs without the pre-amp and do live comparisons? You may find the pre- amp is actually making things worse.
Amplifying noise and bringing in more out of band signals sometimes isn't very useful... (GRIN).
-- Nate Duehr - WY0X nate@natetech.com