Re: [Repeater-Builder] Mastr II drift problem
Mike wrote: It's on the page that I've posted the link to three times hoping that Steve would look at it. See this article http://www.repeater-builder.com/ge/m2icoms.html Read the whole thing, and look for the paragraph that starts There is one way to cheat Thank you. I scanned all the GE ICOM pages before asking the question, but that fix didn't seemed to fit the situation. My recollection was that he had 2C or 5C elements, not an EC. I must have been remembering it wrong... Sorry for the irritating repetition. Steve WD8DAS
Re: [Repeater-Builder] Mastr II drift problem
modified the plug that goes in to the exciter by putting two resistors and a jumper on the plug to enable the compensate line. Gerald, AA4YQ told me about this. Could you please pass along the details of this mod, or point to a link online? Thanks... Steve sbjohns...@aol.com http://www.wd8das.net/ Radio is your best entertainment value.
Re: [Repeater-Builder] Mastr II drift problem
It's on the page that I've posted the link to three times hoping that Steve would look at it. See this article http://www.repeater-builder.com/ge/m2icoms.html Read the whole thing, and look for the paragraph that starts There is one way to cheat Mike WA6ILQ At 09:38 PM 08/07/10, you wrote: modified the plug that goes in to the exciter by putting two resistors and a jumper on the plug to enable the compensate line. Gerald, AA4YQ told me about this. Could you please pass along the details of this mod, or point to a link online? Thanks... Steve sbjohns...@aol.com http://www.wd8das.net/ Radio is your best entertainment value. Yahoo! Groups Links
[Repeater-Builder] Mastr II drift problem
Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
RE: [Repeater-Builder] Mastr II drift problem
Only if your crystals in the ICOMs are from BOMAR. David From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of steve Sent: Tuesday, August 03, 2010 5:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr II drift problem Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
RE: [Repeater-Builder] Mastr II drift problem
Did you just buy the crystals and insert them in the ICOMs or did you send them in to the crystal MFG to be compensated. If you did them yourself the compensation is probably now messed up. The best way to fix it is to send them in to the crystal MFG for compensation. Stan From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of steve Sent: Tuesday, August 03, 2010 5:33 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mastr II drift problem Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF
Re: [Repeater-Builder] Mastr II drift problem
At 03:33 PM 08/03/10, you wrote: Hello all, I have having a severe drift problem on my GE Mastr II 2 meter repeater. The transmit freq will drift nearly 2 KHZ over a 5-10 minute period. I have changed exciters and used a different ICOM but no improvement. The building that I am in is not ventilated and is very very hot. I put a high/low thermometer in and one day the high temp in the building was 114 degrees. Is this the problem? Thanks for any help. Steve W4SEF Can you elaborate on the situation? Is it an FM exciter or a phase mod exciter? Is it an EC, a 5C, or 2C Icom? Have you read http://www.repeater-builder.com/ge/m2icoms.html especially the paragraph that starts with Any voltage change on the +10vDC power supply line will change the frequency on the Icom... ?? You will also what to read the page at http://www.repeater-builder.com/tech-info/temperature-compensation.html. An idea on cooled down a building before you set the frequency... I once took a couple of cheapie box fans and setting one to blow in (at floor level) and the second stacked above it to blow out (at the top of the door level), and with a piece of cardboard in between them as an air dam. The cardboard was cut from the side of a large cardboard box that was used to ship a washing machine (ask for one at any appliance store). You could do something similar for the time period needed to set the frequency - your target is 75 to 80 degrees F for about an hour. Look at page 5 of this: http://www.repeater-builder.com/ge/lbi-library/lbi-38505a.pdf Yes, it's a receiver LBI, and you have a drifting transmitter, but the temperature notes apply. Mike WA6ILQ
