> I'm building a VHF high band repeater... on a tight budget. I have > everything except a duplexer. I need some recomendations on cheap > abundant duplexers that will do the 600Khz split. Max power I'll be > using is 50 - 75W so recomendations for some Monster wacom or TXRX > duplexers that can handle a bazilion watts do not need to be posted, > besides, I probably wouldn't be able to afford ANY used wacom or txrx > duplexer sets. > > If you have something low cost that can work or if you know of > something cheap that can work, let me know.
There is almost no such thing as a low cost duplexer for 2 meters. It is probably the most expensive piece of the repeater. If you have the time and skills there have been some plans published but they must be in a building where the temperature does not change very much. There are some inexpensive duplexers for the 440 band . You may be beter off there on a limiated budget. The comercial 150 mhz band used a much wider split than the hams were allowed. The 440 band and the nearby comercial band usually use a 5 mhz split and the duplexers were much smaller and cheeper. Even going from a 10 watt repeater to a 100 watt repeater is only 10 db and that is not much when you need about 80 to 100 db worth of isolation. It is not usually the ammout of power at 2 meters but the total isolation that is where the big money comes in. With a little work the repeaters can be made very inexpensive tuil you add a good antenna, feedline and duplexer. Almost no one thinks of this when thy start out with the radio and controler. I have put together repeaters for about $ 300 to $ 400 each for the electronics and then spent that much or more for the antenna system and much more for a duplexer. Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
