[Repeater-Builder] Re: simplex repeater
You can also put the NHRC2 repeater controller in Simplex mode. If you have the ISD sound chip installed, when the controller is in simplex mode it will record the last 20 seconds of audio, then when the carrier is gone, it will key the transmitter and replay it. Jim WB8AZP
[Repeater-Builder] Re: simplex repeater
Somewhere in my pile of data books I have an application note that refers to a simplex repeater being used in commercial applications. The booklet was from either dB Products or Pye as I recall. The purpose of their simplex repeater was to fill local coverage holes. The equipment described consisted of 2 beam antennas, one pointed at the source and the other pointed at the hole with an amplifier and filter between them. The antennas were adjusted for maximum isolation and the amplifier gain was set to be considerably less than the isolation between the antennas. Similar setups were used in the early days of television to give coverage in behind mountains. These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ MCH wrote: Just because you call something a repeater doesn't mean it is. A simplex repeater is not a repeater due to two things: 1. It does not simultaneously retransmit, and 2. It transmits on the same frequency. Point #1 was just clarified by the FCC Monday, but point #2 has never been misinterpreted in the FCC definition, AFAIK. Joe M. Dave Gomberg wrote: At 16:34 3/24/2009, Jeff Condit wrote: What do you call it when messages are recorded and then retransmission begins right after reception ends? By this definition it would not constitute a simplex repeater, right? That is exactly m y understanding of what simplex repeater means Jeff Condit Yahoo! Groups Links
[Repeater-Builder] Re: simplex repeater
--- In Repeater-Builder@yahoogroups.com, Burt Lang b...@... wrote: Has anyone else seen such application notes or booklets??? Google for Plessey Groundsat A lot of my late father's work went into that box . 73 de WR3D
Re: [Repeater-Builder] Re: simplex repeater
I think I've read of similar application in microwave multi-hops, where very high isolations can be achieved between back-to-back antennas. - Original Message - From: Burt Lang To: Repeater-Builder@yahoogroups.com Sent: Wednesday, March 25, 2009 12:25 PM Subject: [Repeater-Builder] Re: simplex repeater Somewhere in my pile of data books I have an application note that refers to a simplex repeater being used in commercial applications. The booklet was from either dB Products or Pye as I recall. The purpose of their simplex repeater was to fill local coverage holes. The equipment described consisted of 2 beam antennas, one pointed at the source and the other pointed at the hole with an amplifier and filter between them. The antennas were adjusted for maximum isolation and the amplifier gain was set to be considerably less than the isolation between the antennas. Similar setups were used in the early days of television to give coverage in behind mountains. These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ
Re: [Repeater-Builder] Re: simplex repeater
the term 'simplex repeater' was coined by one of the 'el cheapo' 2-way makers about 1978 or so it was marketed as the 'SARR'Simplex Audio Recorder / Repeater it never caught on Gary - Original Message - From: Laryn Lohman To: Repeater-Builder@yahoogroups.com Sent: Wednesday, March 25, 2009 9:25 PM Subject: [Repeater-Builder] Re: simplex repeater These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ None other than our own Mike WA6ILQ co-wrote a book on repeaters a number of years ago and referenced with an illustration and text how such a repeater would work. Would be fun to play with sometime... Still good reading by the way. Laryn K8TVZ -- Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.11.29/2023 - Release Date: 03/25/09 18:54:00
Re: [Repeater-Builder] Re: simplex repeater
Gary Glaenzer wrote: the term 'simplex repeater' was coined by one of the 'el cheapo' 2-way makers about 1978 or so it was marketed as the 'SARR'Simplex Audio Recorder / Repeater it never caught on Gary Seems to me the first one I heard of actually had a tape loop in it...|cP
Re: [Repeater-Builder] Re: simplex repeater
correct - Original Message - From: wd8chl To: Repeater-Builder@yahoogroups.com Sent: Thursday, March 26, 2009 10:00 AM Subject: Re: [Repeater-Builder] Re: simplex repeater Gary Glaenzer wrote: the term 'simplex repeater' was coined by one of the 'el cheapo' 2-way makers about 1978 or so it was marketed as the 'SARR'Simplex Audio Recorder / Repeater it never caught on Gary Seems to me the first one I heard of actually had a tape loop in it...|cP -- Checked by AVG - www.avg.com Version: 8.0.238 / Virus Database: 270.11.29/2023 - Release Date: 03/25/09 18:54:00
Re: [Repeater-Builder] Re: simplex repeater
I saw this work once back in the '70s when the Ft Worth TX 146.94 repeater was configured to retransmit the 146.94 output of the Little Rock AR repeater. This was possible because the Ft Worth repeater receiver was at 1000 ft with its transmitter at 500 ft. 440 Links back to the control operator for 146.94 as well as 146.34 allowed him to patch the 94 received signal to the 94 transmitter. The repeater would howl during stand down for the Little Rock repeater, but I carried on a conversation with a station in Little Rock through this lash up. Obviously the band was open for the over 200 mile path between Little Rock and Ft Worth. 73 - Jim W5ZIT --- On Wed, 3/25/09, Laryn Lohman lar...@hotmail.com wrote: From: Laryn Lohman lar...@hotmail.com Subject: [Repeater-Builder] Re: simplex repeater To: Repeater-Builder@yahoogroups.com Date: Wednesday, March 25, 2009, 9:25 PM These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ None other than our own Mike WA6ILQ co-wrote a book on repeaters a number of years ago and referenced with an illustration and text how such a repeater would work. Would be fun to play with sometime... Still good reading by the way. Laryn K8TVZ ___
[Repeater-Builder] Re: simplex repeater
These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ None other than our own Mike WA6ILQ co-wrote a book on repeaters a number of years ago and referenced with an illustration and text how such a repeater would work. Would be fun to play with sometime... Still good reading by the way. Laryn K8TVZ
Re: [Repeater-Builder] Re: simplex repeater
I believe you're talking about a passive repeater. Joe M. Burt Lang wrote: Somewhere in my pile of data books I have an application note that refers to a simplex repeater being used in commercial applications. The booklet was from either dB Products or Pye as I recall. The purpose of their simplex repeater was to fill local coverage holes. The equipment described consisted of 2 beam antennas, one pointed at the source and the other pointed at the hole with an amplifier and filter between them. The antennas were adjusted for maximum isolation and the amplifier gain was set to be considerably less than the isolation between the antennas. Similar setups were used in the early days of television to give coverage in behind mountains. These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ MCH wrote: Just because you call something a repeater doesn't mean it is. A simplex repeater is not a repeater due to two things: 1. It does not simultaneously retransmit, and 2. It transmits on the same frequency. Point #1 was just clarified by the FCC Monday, but point #2 has never been misinterpreted in the FCC definition, AFAIK. Joe M. Dave Gomberg wrote: At 16:34 3/24/2009, Jeff Condit wrote: What do you call it when messages are recorded and then retransmission begins right after reception ends? By this definition it would not constitute a simplex repeater, right? That is exactly m y understanding of what simplex repeater means Jeff Condit Yahoo! Groups Links Yahoo! Groups Links
Re: [Repeater-Builder] Re: simplex repeater
Basically, what you describe is called a 'BDA', or Bi-Directional Amplifier, used a lot for hole fills. TX-RX and EMR are main sources of good units. Wilson is a source of not-so-good ones. There was a real simplex repeater in CA for a while. rom what I understand, it was more or less 2 transceivers on 146.82 simplex on opposite sides of a BIG mountain. There was enough isolation between the two sites that it was impossible to talk simplex from one to the other. The radios were cross-connected, wire-line I presume, so that someone on one side transmitting would be retransmitted on the other side on the same freq. Burt Lang wrote: Somewhere in my pile of data books I have an application note that refers to a simplex repeater being used in commercial applications. The booklet was from either dB Products or Pye as I recall. The purpose of their simplex repeater was to fill local coverage holes. The equipment described consisted of 2 beam antennas, one pointed at the source and the other pointed at the hole with an amplifier and filter between them. The antennas were adjusted for maximum isolation and the amplifier gain was set to be considerably less than the isolation between the antennas. Similar setups were used in the early days of television to give coverage in behind mountains. These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ
[Repeater-Builder] Re: Simplex repeater
--- In Repeater-Builder@yahoogroups.com, IF YOUR NICE I MAY TELL YOU [EMAIL PROTECTED] wrote: Hi all what do I need to put together a simplex repeater without using a recording device.I would like to hook up 2 radios and antennas.Thanks for any input.KC0USN 73's Do simplex repeaters require Frequency cordinater to give frequency or can you pick your own? Hello Frank it CAN be done Plessey managed it as a true low-power simplex repeater but it wqs VERY complex.I would'nt attempt to build one and IF you can find one on the surplus market it will cost you $5000 at least (although sucessful they only built about 100 of them) There are quite a few articles on the Web about this device my advice is forget the idea and do as others have suggested and use a Parrot (RadioShack and MFJ both make good ones) g8umx (30 years in Military radio and Defence Electronics)
[Repeater-Builder] Re: Simplex Repeater
--- In Repeater-Builder@yahoogroups.com, Kent Chong [EMAIL PROTECTED] wrote: Good Day, We are using simplex radio (using single frequency for transmit and receive) and we would like to build a repeater. We would appreciate it if anybody could advise us how to do it. Best Regards, Chong Kwan Meng Where are you doing this? USA? What freq?
[Repeater-Builder] Re: Simplex repeater Controller
Randy, The RS, as others have suggested, did just as you want and yes they have not made them for a number of years. Every once in a while do see on ebay. I've used a version of the ISD voice R/P IC for similar applications. The RS was 20 sec, but ISD made the same in their ISD14xx series in 20 to 4 minute units. JameCo has them. Would require some small interface to make it work such as use COS to force record and then strobe and playback and generate PTT. I think Hamtronics made about the same. They did a clever, non- documented, not good design engineering of the IC on the audio output on playback would go to about 2.5 VDC, 0 when dormant. They used it to generate a ptt on playback. It did work. I have a similar device I got in a trade about 10 years ago from a company who use to sell as a talking repeater controller. They used the slogan our controllers speak for themselves. It lasted about a year. They went on to bigger and better things such as voice signs for such as wet floor signs for the blind. I have one of these you can have for the $7 shipping. I will have to dig in the junk box to find, but it is new, never been used in the box (old time wise). I'll look for it and do some studing to see what it would take to adapt it for your application. 73, ron, n9ee/r ps For some reason some seem to take a good subject and talk about other things such as language. Well, when it comes to hams they talk about a lot, hi. --- In Repeater-Builder@yahoogroups.com, Randy Elliott [EMAIL PROTECTED] wrote: Greetings to the Group I need a little advise. I am putting together a simplex repeater for a non-profit group that already has a frequency but they need to extend their range. Basically what I an looking for is a DVR type controller to record and spit back out on the same radio. Does anyone know of something available that is not the cost of a full blown controller? Thanks Randy Elliott VE3JPU 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/
