Apart fro the other comments about what frequency it's on, my 2 suggestions to minimize desense would be to TOTALLY shield the receiver (bringing in the antenna connection, of course), with a feedthrough cap on the power line, and getting the antennas on the same pole/mast right above each other, if you can, with 30 or more feet separation. You may also need double shielded coax on the receiver, also. Congratulations, however on an innovative system. (Skipp should be proud).
Charles, KS3Z --- Paul M Schmitter <[EMAIL PROTECTED]> wrote: > I'm actually working on improving my poor man's > repeater right now. > Basically here's what I've been using during tests: > Vertex FTL-7011 as transmitter > Advanced research preamp > Radio Shack FRS Cat # 21-1811 retuned as > receiver(not > very selective) > Controller is homemade. Found COR from FRS and fed > thru diode to base of NPN transistor. Also connected > to base of transistor was a simple RC circuit to > create a tail on the repeater. The emitter went to > ground and the collector to PTT on the Vertex. Using > an old Radio Shack digital voice module(20 second), > I > recorded an ID message. Using a 555 timer, I created > a > pulse to trigger the ID every 15 minutes. The pulse > also triggered another 555 to activate the PTT for a > preset time for the ID. The second 555 connects thru > a > diode to the base of the NPN transistor mentioned > earlier. > Audio output from receiver goes thru simple resistor > network to lower signal and more or less balance > impedence before connecting to mike input of Vertex. > > Using a 12 volt/ 5 volt supply for system. 12 volts > for Vertex and 5 volts for receiver and controller. > Early test show incredible de-sense in the receiver > due to no duplexer. I'm using separate antennas > placed > 30 ft apart horizontally and 20 feet apart > vertically. > > I'm now working on integrating a different receiver > and purchasing a use duplexer. > > That's my story and I'm sticking to it. > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
