Dan:
I'm in the process of putting one of those on the air now. They were/are referred to as GE-Net 900 stations. As far as I'm aware, there are only a handful of the stations in amateur service. The GETC (General Electric Trunking Controller) is how the station's frequency is set (among other functions) and pretty much useless for amateur use. The transmit frequency is set in the GETC and it automatically sets the receive frequency 39 MHz lower. The GETC actually downloads the info to the station when it is turned on. KD8B has designed a substitute for this function of the GETC. (I see Doug beat me to a reply!) Equally as important as a way to set the rx/tx frequencies is the Master Oscillator. As these stations were usually installed in trunking systems with multiple stations at a location, the MO was designed to supply its high stability output (17.6125 MHz) to multiple stations- the individual stations typically did not have their own MO. The MO would be in its own rack mount case, about the same size as the GETC. The PA is 24 volts. From my research, it will run fine on 28 volts (in fact the LBI indicates that the 24 volt power supply will actually put out up to 28 volts depending on how heavily it is loaded). If you decide it isn't worth messing with, I'd be interested in a spare (and I see Doug would be interested in it too!). Doug K4AC From: [email protected] [mailto:[email protected]] On Behalf Of Dan Sent: Thursday, March 26, 2009 7:38 PM To: [email protected] Subject: [Repeater-Builder] 900MHZ MASTR II Is there any good use for a 900MHZ MASTR II? I have one with the GETC controller attached. I have looked over all the info I can find and do not see a good way to make this thing work on the ham band. My question is, Is the repeater junk other than the PA? I have a MSF-5000 on 902 and that was a breeze. Just wondering before I start junking it out to make room in my garage for the other 4 MASTR II repeaters I picked up. They are all VHF and UHF. Thanks Dan
