I have done the same also and it works well enough to get on the air quickly.
Roger W5RD >From: "Steve Bosshard (NU5D)" <[EMAIL PROTECTED]> >Date: Fri Dec 23 08:38:52 CST 2005 >To: [email protected] >Subject: RE: [Repeater-Builder] Duplexer tuning with MINIMUM tools >I once used a 10 Watt freq agile transmitter and wattmeter to set pass freq >and a bearcat scanner and a tunable variable frequency generator to set >notch on a wacom 678 UHF duplexer. Tuned notch for noisiest signal into >scanner. > >Steve >NU5D > >-----Original Message----- >From: [email protected] >[mailto:[EMAIL PROTECTED] On Behalf Of Reza PWW >Sent: Thursday, December 22, 2005 10:29 PM >To: [email protected] >Subject: Re: [Repeater-Builder] Duplexer tuning with MINIMUM tools > >I mean in emergency situation, like in natural >disaster. > >What the minimal tools I have to have to be able to >adjust the duplexer and how? > >reza > > >--- Kris Kirby <[EMAIL PROTECTED]> wrote: > >> On Thu, 22 Dec 2005, Reza PWW wrote: >> > Can anybody can advise me for tunning duplexer >> with minimum tools? For >> > example case: I have to change TX-RX frequensi in >> some place, where I >> > only have SWR and some HT and volt meter? >> >> A case of beer, an SWR meter, and a radio. Tune for >> minimum SWR. The case >> of beer is to insure accuracy -- largely because >> there isn't much. You're >> tuning for minimum insertion loss at that point >> (technically return loss). >> >> Really, you should find a friend with an IFR, >> communications analyzer, or >> spectrum analyzer with a tracking generator. To >> properly do the job, you >> need a dummy load on the unused port. Impedance >> mismatches can also do a >> job on cavity performance. >> >> -- >> Kris Kirby, KE4AHR <[EMAIL PROTECTED]> >> "BIG BROTHER IS WATCHING >> YOU!" >> This message brought to you by the US Department of >> Homeland Security > > > > > > > >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/
