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 <*> 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/
[Repeater-Builder] Duplexer tuning with MINIMUM tools
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? thanks reza __ Yahoo! for Good - Make a difference this year. http://brand.yahoo.com/cybergivingweek2005/ 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/
Re: [Repeater-Builder] New info added to the Vertex VXR-7000 page
Same with me, currently just try to find out why the AF MONI sound is more loud than the retransmit AF out. I tried to adjust VR4001 but it doesn't much help. And your comment give me some ideas. At schematic diagram and in service manual book, they mentioned about -20db AF attenuate by R4180 and R4211 before limiter op-amp. And my idea is to bypass or to change with VR so later I can adjust the AF attenuation If it is not solve the problem, I will try to look at electronic volume control Q4029. The IC is controlled by maxdev trough DAC. This IC fungtion is for control volume AF out before TX MIX op-amp. maybe change value C4162 and C4171 to 4.7uf will also help. reza --- [EMAIL PROTECTED]> wrote: > I just added some new info, courtesy of WA6BZBZSo my > Vertex VXVXR000 > repeater page. It is about using a different audio > input pin on the > controller connector. Good stuff! I will also add > info on getting a PL > decode indication from the RJRJack on back of the > repeater. WA6BZBZS > also discovered that. There is a bit of info in the > manual about it, > but Bill does a better job describing the "how-to" > part. I didn't > realize it was there when I built my system, and > ended up using an > external decoder... (read the book!) > > Link to Vertex page: > hthttp/wajammerdaveom/vertex.hthtml> Or via the Repeater-Builders web site.. > > 73 & Very Merry Christmas! > > dadaveNA6DFDF> > > > > > > > > Yahoo! Groups Links > > > Repeater-Builder-ununsubscribeayahoogroupsom > > > > > __ Yahoo! for Good - Make a difference this year. http://brand.yahoo.com/cybergivingweek2005/ 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/
[Repeater-Builder] VXR 9000 service manual
Hi all, Could somebody can help me to get the file? reza __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com 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/
