Re: [Repeater-Builder] GE MASTR II Audio problem
drwoolweaver wrote: My club has a GE MASTR II mobile modified repeater controlled by an ACC96. The ACC96 has a small satellite board plugged into socket U33 on the right side of the main board. There are two chips on the board: SN74HC74N and PAL10L8NC. Transmit audio is good going to the small satellite board, but fuzzy coming out. Anyone know a source for replacement chips? Any thoughts on trouble shooting? Anyone know the exact purpose of the small satellite board? Any help appreciated. Do this: http://www.repeater-builder.com/arcom/arcom-rad-in-acc.html Kevin 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] GE Mastr II Audio Problem
Daron J. Wilson wrote: I have a GE Mastr II UHF repeater that has been doing pretty well for me, last trip to the hill was a low power issue and I spotted a nice blue spark where the coax attaches to the PA board on transmit, rather easy fix. How do you have it connected? On either the base or mobile version, it should connect with an RCA jack. This is a repeater chassis, the 40 watt PA, and the RF leaves the PA board and goes to the filter board via a small coax soldered on both ends, it's the standard set up. Ahhh. I was thinking you had the main coax connected to the PA somehow. Don't laugh - I've seen much worse. I can honestly see some of the members here tossing out that power robbing filter crap and connecting their feedline right to the output on a 75W or 100W board. I can't say I've ever seen a 40W model lose connection at the coax. However when I enabled the local speaker, it caused a feedback type howl on receive. As I decrease the volume on the local speaker it gets worse, and the only way to keep it out at all is full volume on the local speaker. I've seen many cases where the audio transistors will go into oscillation when the speaker is disconnected, but not when you simply turn down the volume. But then again, considering your above info, is this on an IDA board (the only one I know of that has a pot to turn) or is your audio connected OEM or something else? I.E. Are you removing the load from the audio amp? Standard repeater chassis, there is a local speaker in the base of the chassis and a switch to enable it or disable it. I'm assuming that the design is such that the thing will run normally with the speaker disabled, I'll have to trace the thing out to see if the switch that disables the speaker puts a load across the audio amp. OK. So you're not turning it down - you're switching it to low level or off. Yes, it should run without the speaker enabled. In fact, that is how all repeaters should be operated. I've seen many times when the local speaker is left on and you're trying to tune a repeater with an adjacent repeater blaring away. This is much more important with ham repeaters where the conversations can be much longer. I would suspect the switch. You said it DOES howl when on low volume or just when the speaker is completely disabled? I don't have my manuals here where I can confirm that it does switch it to a load. I am pretty sure it does, but can't say 100%. Joe M. 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] GE Mastr II Audio Problem
Daron J. Wilson wrote: I have a GE Mastr II UHF repeater that has been doing pretty well for me, last trip to the hill was a low power issue and I spotted a nice blue spark where the coax attaches to the PA board on transmit, rather easy fix. How do you have it connected? On either the base or mobile version, it should connect with an RCA jack. However when I enabled the local speaker, it caused a feedback type howl on receive. As I decrease the volume on the local speaker it gets worse, and the only way to keep it out at all is full volume on the local speaker. I've seen many cases where the audio transistors will go into oscillation when the speaker is disconnected, but not when you simply turn down the volume. But then again, considering your above info, is this on an IDA board (the only one I know of that has a pot to turn) or is your audio connected OEM or something else? I.E. Are you removing the load from the audio amp? Joe M. 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] GE Mastr II Audio Problem
I have a GE Mastr II UHF repeater that has been doing pretty well for me, last trip to the hill was a low power issue and I spotted a nice blue spark where the coax attaches to the PA board on transmit, rather easy fix. How do you have it connected? On either the base or mobile version, it should connect with an RCA jack. This is a repeater chassis, the 40 watt PA, and the RF leaves the PA board and goes to the filter board via a small coax soldered on both ends, it's the standard set up. However when I enabled the local speaker, it caused a feedback type howl on receive. As I decrease the volume on the local speaker it gets worse, and the only way to keep it out at all is full volume on the local speaker. I've seen many cases where the audio transistors will go into oscillation when the speaker is disconnected, but not when you simply turn down the volume. But then again, considering your above info, is this on an IDA board (the only one I know of that has a pot to turn) or is your audio connected OEM or something else? I.E. Are you removing the load from the audio amp? Standard repeater chassis, there is a local speaker in the base of the chassis and a switch to enable it or disable it. I'm assuming that the design is such that the thing will run normally with the speaker disabled, I'll have to trace the thing out to see if the switch that disables the speaker puts a load across the audio amp. Daron J. Wilson, RCDD ) ) Telecom Manager ( ( LH Morris Electric, Inc. ) ) (541) 265-8067 office _|| mmm! (541) 265-7652 fax ( || coffee! (541) 270-5886 cellular \|| [EMAIL PROTECTED]|| 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/
