Re: [Repeater-Builder] Re: repeater problems solved
This may have been addressed earlier, and if so I apologize. A GE Mobile Mastr II will generate an oscillation in the audio output stage if it is not loaded at all times. I don't remember the beginning of this thread, but if you are using a GE Mobile radio, this will wind up transmitting a tone on the repeated signal. I go one step further than putting a load on the speaker leads (10 Ohms) - I place a small teflon sleeve over the pin to the mother board that supplies B+ to the audio output stage after desense tests are completed. This removes B+ from the audio amp, and the sleeve can be removed if the audio output needs to be activated for later tests. 73 - Jim W5ZIT --- On Tue, 11/10/09, W3ML w...@arrl.net wrote: From: W3ML w...@arrl.net Subject: [Repeater-Builder] Re: repeater problems solved To: Repeater-Builder@yahoogroups.com Date: Tuesday, November 10, 2009, 4:19 PM Thanks, I will check that. It is funny that out of the guys that hear it most are using mobile rigs. But, then the other night they said hey it is gone. Then ten minutes later it is back. All I know is with the fixes I was given by a great bunch of hams on here and the GE site and the with the new antenna and coax the repeater works like it is suppose to and sounds great to me. Of course, I am losing my hearing so I don't hear the tone. Thanks and 73 John --- In Repeater-Builder@ yahoogroups. com, wd8chl wd8...@... wrote: W3ML wrote: If it is not the grounded negative terminal I will just put in high pass filter on the PL cable. That should help reduce it or remove it. Thanks all. 73 John I wouldn't do that. FIRST-unplug the encoder audio out lead and see if it's still there (maybe the voltage in lead too, then ground). Then check levels. It should be between 500 and 800 Hz deviation. Then look for a good clean sine wave. Com-Spec SS-32's and TS-32's are known to have a less than perfect sine wave and can sound a bit raspy sometimes. If all that is OK, the problem is on the receiving end.
Re: [Repeater-Builder] Re: repeater problems solved
W3ML wrote: If it is not the grounded negative terminal I will just put in high pass filter on the PL cable. That should help reduce it or remove it. Thanks all. 73 John I wouldn't do that. FIRST-unplug the encoder audio out lead and see if it's still there (maybe the voltage in lead too, then ground). Then check levels. It should be between 500 and 800 Hz deviation. Then look for a good clean sine wave. Com-Spec SS-32's and TS-32's are known to have a less than perfect sine wave and can sound a bit raspy sometimes. If all that is OK, the problem is on the receiving end.
Re: [Repeater-Builder] Re: repeater problems solved
Was the heatsink compound all dried out? Chuck WB2EDV - Original Message - From: W3ML w...@arrl.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 08, 2009 9:47 PM Subject: [Repeater-Builder] Re: repeater problems solved Okay Eric, I will check the power supply again. But, yes most of them use Yaesu and couple have Icoms. But, the hum is nothing we can't live with. I don't hear it at all on the speaker hooked to the repeater. But, of course my hearing is not the best anymore. All I know it is nice to have the thing working like a repeater should. Thanks and 73 John, W3ML
Re: [Repeater-Builder] Re: repeater problems solved
At 07:11 PM 11/8/2009, W3ML wrote: You know that is funny as one of the guys said that last night it did stop. But, it was back today when he listened again. I am thinking about placing torrids on the cable runs from the controller(RC210) to the box where the PL tone board is and then to the radio. Maybe put one between the RC210 and the tone board and then another one on the cable going to the radio out of the tone board. 131.8 Hz is close enough to 120 Hz so that most folks couldn't tell the difference. I am at a loss to understand what you think the torroids will do? They won't filter the tone off the receiver audio at all. Ken -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
