As far as the SP, I think that might be something just for them, mine has a SP1 after the model number. I can't say for sure about a busy site, my repeater was in town next to several VHF transmitters and one other UHF transmitter, as well as a Railroad radio system, and about a 1000 feet from a Microwave tower for the local phone company, never had any problems with it and interference. I just remember when we had it open that the tuning coils were somewhat on the fragile side. If need be I could get a hold of the gentlemen that tuned mine, see if he remembers it, kind of hard to say, that was back in 1988 that we built this repeater.
Mathew ----- Original Message ----- From: "Eric Lemmon" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, January 02, 2005 10:22 AM Subject: Re: [Repeater-Builder] Possible Motorola duplexer? > > Joe, > > It's a small world! I have exactly the same Motorola duplexer, that > came mounted on the back of a 100 watt MICOR MSY repeater previously > used by Union Oil Company. My unit is marked TFE6080A SP300, and was > tuned to 451.675/456.675 MHz. > > This unit comprises six helical resonators in a notch-only > configuration, and is known as a "Compact Base Station Duplexer." A > friend of mine who is a Motorola technician tried to get information on > this unit from the factory, but found nothing. Although it is more > rugged and has a deeper notch than the typical mobile notch duplexer, it > has practically no bandpass action and is therefore not suitable for use > at a congested site unless additional bandpass cavities are employed. > > The SP300 marking on my unit suggests that it was not a standard > production item, and may account for the lack of available information > on it. The photo in the link you provided seems to show a faint "SP" > after the model number... true? > > 73, Eric Lemmon WB6FLY > > Joe wrote: > > > I found this UHF BP/BR duplexer in back of some stuff while I was > cleaning the shack: > > http://users.adelphia.net/~k1ike/UHFbpbr1.JPG > > Anyone have an ID on this one? It is marked TFE6080A and is mounted on a 19" rack plate. > > > > 73, Joe, K1ike > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
