Paul, Quite simply, the wider the split, the easier it is to make a 2m repeater "portable." A 1 MHz split is hardly more usable than the standard 600 kHz split; it still requires a full-size cavity duplexer. Several duplexer manufacturers make a six-element compact base station duplexer that is designed for a 3 MHz split at VHF. I bought such a duplexer from RFS/Celwave, a model 5085-1, for the 144.930/147.585 split used in Southern California. It works very well with a 10 watt R1225 full-duplex transceiver, and the entire repeater fits in a fiberglass carrying case that is less than one cubic foot in volume and weighs less than a full attaché case. That's what I call portable. Whoever came up with a 1 MHz split, thinking it would work for a 2m portable repeater, perhaps does not understand the realities of duplexer operation.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Paul Yonge Sent: Tuesday, May 16, 2006 9:26 PM To: [email protected] Subject: [Repeater-Builder] Itinerant Repeater Odd Splits My recent post about "minimum splits" was not well-expressed. A week or so ago, there was considerable discussion about portable repeaters in the two-meter band and several suggestions referred to the 144.930-147.585 MHz pair with a 2.655 MHz split. An article by Gary Bargholz, N9UUR, Chairman, Wisconsin Association of Repeaters in a December 2002 newsletter referred to SNP (Shared, Not Protected) repeater pairs with a 1 MHz split. There were six output frequencies from 146.415 to 146.490 MHz and six input frequencies from 147.415 to 147.490. ARES/RACES statewide use was recommended on 146.430/147.430 MHz and 146.445/147.445 MHz. What would the relative advantages and disadvantages be between the 1 MHz and the 2.655 MHz odd splits? Paul Yonge W2ARK MIDLAKES REPEATER [EMAIL PROTECTED] 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/
