No one has answered his original question, that is: What benefit does he get by wiring the exciter to be ON all the time?
I think he's discovered one of the non-benefits and is trying to figure out if the leakage he's experiencing is worth the effort. Even a well-shielded and filtered repeater station will leak something. Personally, I think I'd only keep just the oscillator running all the time, not the entire exciter. The only reason I can think of doing this is if the oscillator is slow to come up to frequency when the station is keyed. I would expect it to take only milliseconds for stability to occur, so there really shouldn't be any noticeable benefit. The exciter is putting out a whole lot more RF power than the oscillator. Perhaps this is really what he's done, or should do. Bob M. ====== --- Eric Lemmon <[EMAIL PROTECTED]> wrote: > Jordan, > > Assuming your Micor station has a unified chassis, > was it always a repeater, > or was it converted to repeater use from a base > station? Repeater stations > have a great deal of extra filtering in the > interconnect boards that connect > the RX and TX shelves to the backplane. The > repeater chassis also is > equipped with extra shield plates that cover the RX > and TX shelves, which > plates should be secured with all screws in place. > The purpose of the extra > filtering and shielding is to prevent (or greatly > attenuate) any direct > radiation from the exciter oscillator or the RX > injection oscillator. > > 73, Eric Lemmon WB6FLY > > > -----Original Message----- > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf > Of twoway_tech > Sent: Monday, May 28, 2007 9:15 PM > To: [email protected] > Subject: [Repeater-Builder] Micor oscillator mod > question > > I just modified my micor UHF for the exciter to be > on all of the time. > I am not for sure that I really like this mod. The > oscillator signal > seems to carry pretty far. Can someone tell me > exactly what is gained > by wiring the exciter to be on all of the time. Is > it just for faster > transmit response time? > Thanks & I'm sure there will be more questions to > come! > > Jordan, K9NZF ____________________________________________________________________________________ Looking for earth-friendly autos? Browse Top Cars by "Green Rating" at Yahoo! Autos' Green Center. http://autos.yahoo.com/green_center/
