Mike, A community repeater is simply a shared repeater, and the individual subscribers have unique PL or DCS tone pairs assigned to them. For example, Ace Taxi might have PL tone 82.5, Jones Ready-Mix might have 97.4, and Smith Funeral Home might have 131.8. When the radio traffic is very sporadic, none of the users are aware of the other's existence. It works fine until the number of users is increased to the point where "collisions" occur. Most community repeater operators use a radio feature called "Busy Channel Blocking" which prevents other users from transmitting on top of a user who is using the channel. Of course, the FCC requires users to first ascertain that the channel is free before making a call, and that is why most commercial radios go into carrier squelch mode when the mike is removed from its hangup clip. Unfortunately, some community repeater users seem to think that their subscription entitles them to immediate and eternal use of the radio channel, and they become annoyed when the radio won't let them transmit. It is for this reason that simple trunked systems with as few as three radio channels have largely replaced community repeaters. However, community repeaters still have a place in the scheme of things, when the users have very infrequent and low-key traffic.
73, Eric Lemmon WB6FLY -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Benonis Sent: Monday, February 04, 2008 5:23 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Micor Repeater - ID? What exactly is a community repeater? I've seen references to it, but I haven't seen a definition yet. Best regards, Mike Benonis Electrical Engineering '09 Department of Drama Sound Engineer The University of Virginia [EMAIL PROTECTED] <mailto:mjb8h%40virginia.edu> KI4RIX On Feb 4, 2008, at 3:55 , sgreact47 wrote: > Acually it IS a C64RCB-3105AY which is a eight user comunity > repeater. > > > "Eric Lemmon" <[EMAIL PROTECTED]> wrote: >> >> Mike, >> >> The C64RCB-3105AT (I'm pretty sure the "Y" is actually a "T") > station is >> described as: >> >> C = Compa Station >> 64 = 75 watt output in the UHF band >> RCB = Continuous Duty PA >> 3 = PL Tone-Coded Squelch >> 1 = N/A >> 0 = 1 TX and 1 RX >> 5 = DC Remote Control >> AT = Repeater Station >> >> You can get more information by looking at the numbers stamped on > the >> various boards. >> >> 73, Eric Lemmon WB6FLY >> >> >> -----Original Message----- >> From: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> >> [mailto:Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> ] On Behalf Of Mike Benonis >> Sent: Saturday, February 02, 2008 1:38 PM >> To: Repeater-Builder@yahoogroups.com <mailto:Repeater-Builder%40yahoogroups.com> >> Subject: [Repeater-Builder] Micor Repeater - ID? >> >> Good day, >> I just picked up what I believe is a Micor repeater at a Hamfest >> today for free. I'm told the repeater works, but I can't verify >> that. Here's what I know about it: >> >> Form Factor: Rack-Mounted >> Model Number: C64RCB-3105AY >> FCC Xmit Info: CC4224C >> FCC Rcvr Info: RC0080 >> Frequency: 464.050 MHz (I assume this is TX, but it doesn't say >> specifically on the label) >> >> Cards installed: >> 2x Four User Control Modules >> 1x Master Decoder >> 1x Squelch Gate >> 1x Station COntrol Module >> 1x Time Out Timer >> >> It has a Motorola power supply in the rack at the bottom. I didn't >> see any cans mounted in the rack, but I only found one N connector > on >> the back (ublabeled, of course, but it looks like it comes out of a >> large silver box at the top of the rack with a heatsink on it. I > can >> provide photos of the unit if needed. >> >> I'd like to convert this down to the 440 MHz amateur band if > possible, >> for less than say, $1000 in new parts/repairs. Can anyone tell me, >> based on the information given, if this seems like a reasonable > thing >> to do? If this is a boat anchor, I'm perfectly happy to get rid of > it >> - but I figured, for free, what do I lose? >> >> Best regards, >> >> Mike Benonis >> Electrical Engineering '09 >> Department of Drama Sound Engineer >> The University of Virginia >> [EMAIL PROTECTED] <mailto:mjb8h%40virginia.edu> >> KI4RIX >> > >
