Re: [Repeater-Builder] Duplexer Tuning HELP
Hi Michael. Would Recommend Ron Wright N9EE in Tampa Who owns an 2 meter Repeater in Tampa(very Knowligable. Wesley AB8KD - Original Message - From: Michael Ryan To: Repeater-Builder@yahoogroups.com Sent: Friday, July 25, 2008 3:42 PM Subject: [Repeater-Builder] Duplexer Tuning HELP ·I wonder if anyone in the TAMPA area or even anywhere on the west coast of Florida, could help with tuning a 220 duplexer? I'd like a real tune up rather than some backyard methods that were suggested ! All kiddin' aside I suppose you pay for what you get and I'd like to know they were done right. Any help would be appreciated. · -Mike, K4CVL (941) 376-6453
RE: [Repeater-Builder] Duplexer Tuning HELP
I have already spoken to Ron. He was not able to help or offer suggestion(s). Thanks for the idea though. - Mike From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Wesley Bazell Sent: Sunday, July 27, 2008 7:29 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Duplexer Tuning HELP Hi Michael. Would Recommend Ron Wright N9EE in Tampa Who owns an 2 meter Repeater in Tampa(very Knowligable. Wesley AB8KD - Original Message - From: Michael Ryan To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Friday, July 25, 2008 3:42 PM Subject: [Repeater-Builder] Duplexer Tuning HELP . I wonder if anyone in the TAMPA area or even anywhere on the west coast of Florida, could help with tuning a 220 duplexer? I'd like a real tune up rather than some backyard methods that were suggested ! All kiddin' aside I suppose you pay for what you get and I'd like to know they were done right. Any help would be appreciated. . -Mike, K4CVL (941) 376-6453 __ NOD32 3301 (20080727) Information __ This message was checked by NOD32 antivirus system. http://www.eset.com
Re: [Repeater-Builder] duplexer tuning - help
That would be the best, but you have avalibility and cost issues. On 4/16/05, Per Molund [EMAIL PROTECTED] wrote: Or maybe Invar alloy for maximum temperature stability? ---per 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] duplexer tuning - help
At 07:23 PM 4/15/2005 -0700, you wrote: The problem with the stability is that most of these were constructed using a Galvinised steel rod to set the tuning correct? I solved that problem by putting some slop into the connection between the rod and the plunger. It's kind of hard to explain, but I put two nuts on the threaded rod above the plunger, and two nuts below the plunger. I then locked each set of nuts so that the plunger had about 1/16 of play on the threaded rod. This made tuning a little more difficult. If you past either the notch or the peak, you had to back up and take out the slack before the tuning went the other way. Once I had it tuned, I turned the threaded rod one-half the distance that it took to take out the slack. At this point, the top nuts and bottom nuts are not touching the threaded rod. Therefore, there was no thermal pull on the plunger when the galvanized rod changed length. By now, you are probably wondering why I went through all the trouble! First, 22oMhz duplexers were hard to come by in the 1980's. Second, I'm a very stubborn person and I was going to figure out a way to keep them stable. 73, Joe, K1ike 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] duplexer tuning - help
Not in Indiana, but a comment. I Used one of those Duplexers years ago. Be careful where you locate it. Extremely sensitive to temperature variations. We had it on a mountaintop and retired it after the first winter. Gary - K7NEY - Original Message - From: Paul [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, April 14, 2005 9:33 PM Subject: [Repeater-Builder] duplexer tuning - help I think we located the old repeater and duplexers that used to be here in our little one horse town in northern indiana but I am sure that after sitting in storage ,being moved from place to place and just years of neglect they will probably need to be cleaned and retuned is there anyone out there in northern indiana who could help me with this task ? the tuning part that is (I can clean them ) I do not have service monitors or spectrum analyzers all i have is a wattmeter and an old signal generator (HP tube type heavier than most new cars) these duplexers are a homemade 2 meter duplexer from an old qst artical by John j. Bilodeau w1gan. they are made from 4 inch copper pipe i have the equipment to tune them like the artical says with simple equipment but if it could be done better I would opt for that method they had worked very well for years and I would like to see the repeater up and running again anyone who could help please e-mail me thanks Paul (n9fco) 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/
Re: [Repeater-Builder] duplexer tuning - help
anyone who could help please e-mail me thanks Paul (n9fco) How far are you from Muncie? I've got the gear. 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] duplexer tuning - help
I'm not an expert, but would be willing to help you tune them, I just got mine tuned, once I figured out what I was doing wrong, well not wrong, just did not know about the third set of cans changing things. Always willing to help. Mathew W9MWQ -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Paul Sent: Thursday, April 14, 2005 10:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] duplexer tuning - help I think we located the old repeater and duplexers that used to be here in our little one horse town in northern indiana but I am sure that after sitting in storage ,being moved from place to place and just years of neglect they will probably need to be cleaned and retuned is there anyone out there in northern indiana who could help me with this task ? the tuning part that is (I can clean them ) I do not have service monitors or spectrum analyzers all i have is a wattmeter and an old signal generator (HP tube type heavier than most new cars) these duplexers are a homemade 2 meter duplexer from an old qst artical by John j. Bilodeau w1gan. they are made from 4 inch copper pipe i have the equipment to tune them like the artical says with simple equipment but if it could be done better I would opt for that method they had worked very well for years and I would like to see the repeater up and running again anyone who could help please e-mail me thanks Paul (n9fco) 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/
Re: [Repeater-Builder] duplexer tuning - help
I had a set of sewer pipe duplexers like what you are describing for 220Mhz years ago. I built a wood box, put a small light bulb and a thermostat inside and set it to about 90 degrees. These kept them fairly stable year-round. 73, Joe, k1ike At 07:44 AM 4/15/2005 -0600, you wrote: Not in Indiana, but a comment. I Used one of those Duplexers years ago. Be careful where you locate it. Extremely sensitive to temperature variations. We had it on a mountaintop and retired it after the first winter. Gary - K7NEY 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] duplexer tuning - help
The problem with the stability is that most of these were constructed using a Galvinised steel rod to set the tuning correct? Try a replacing it with a more similar metal to copper like brass or copper threaded rod if you can find it. or a plastic rod that has good tempreture charecteristics. What would be ideal are some threaded bushings with set screws and then the rod doesn't need to be threaded. On 4/15/05, Joe [EMAIL PROTECTED] wrote: I had a set of sewer pipe duplexers like what you are describing for 220Mhz years ago. I built a wood box, put a small light bulb and a thermostat inside and set it to about 90 degrees. These kept them fairly stable year-round. 73, Joe, k1ike At 07:44 AM 4/15/2005 -0600, you wrote: Not in Indiana, but a comment. I Used one of those Duplexers years ago. Be careful where you locate it. Extremely sensitive to temperature variations. We had it on a mountaintop and retired it after the first winter. Gary - K7NEY 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/
