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Old March 2nd 06, 07:09 PM posted to rec.radio.amateur.homebrew
Fred McKenzie
 
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Default Impedence mismatch into FET preamp

In article , "Samuel
Hunt" wrote:

It's not due to desense. When I tune the cavities up properly, there's about
10dB noise figure on the preamp (reciever is 0.8uV sensitive). Then when it
transmits, the noise figure doesn't change.


Sam-

What frequency is this repeater on? A sensitivity of 0.8 uV doesn't sound
very good to me. On 146 MHz I'd expect that without any external preamp,
although it might be good at 1200 MHz???

73, Fred, K4DII