I have added a preamp (ARR GasFet) in front of older GE Pro receivers on UHF and really made an improvement. I am guessing you are using a single antenna and a duplexer and the preamp is between the duplexer and receiver?
Are you using a band pass / band reject duplexer? Some notch duplexers on 440 let signals either side of the notch pass through freely. You might change the coupling on the loops in the receive side of the duplexer to increase loss (attenuation) and get steeper skirts. Tell me a little about the system, antenna, feedline, duplexer, jumpers, the repeater itself? Thanks, Steve NU5D On 3/21/07, ldgelectronics <[EMAIL PROTECTED]> wrote:
Hi all, We've added a preamp to our local repeater and found that it had too much gain. It started picking up lots of garbage. Reducing the gain by about 6db seems to put it in a good operating place.
Ham Radio Spoken Here.....NU5D Visit the Temple Ham Club Website http://www.tarc.org www.yahoogroups.com/group/Temple_arc www.yahoogroups.com/group/60meter
