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/
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] 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/
[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/
