Is there desense using an isolated TEE and Dummy load ? Steve NU5D
Captainlance wrote: > *I use 2 of these, try adding an additional pass cavity on the RX > side.it improves the performance greatly. Also, check the duplexer > with an return loss bridge and a tracking generator. The slightest > off-tune of the unit, especially the rejects and you get noise.I > assume that you are suing double shielded cables, like rg142, and NO > coaxial adaptors in line. Additionally, make sure that your > transmission line is NOT the LMR stuff... very bad for duplex situations.* > *Lance* > > ----- Original Message ----- > *From:* Tony L. <mailto:[EMAIL PROTECTED]> > *To:* [email protected] > <mailto:[email protected]> > *Sent:* Wednesday, November 07, 2007 11:10 PM > *Subject:* [Repeater-Builder] 2 Meter Duplexer Recommendations? > > My Celwave PD 497-1-1 VHF duplexer just can't seem to provide > adequate > tx/rx isolation (Micor 100 watt repeater with 0.6 MHz tx/rx > separation). Everything else seems to check out okay; jumper cables, > connectors, receiver, and hard line. > > I've heard the PD 497-1-1 isn't the latest in duplexer design and was > wondering what other VHF repeater owners might recommend with > regard to > high performing, closed spaced duplexers for moderate power > applications. > > Thanks. > > -- /Subscribe to dstar_digital/ Powered by groups.yahoo.com <http://groups.yahoo.com/group/dstar_digital/>
