Re: [Repeater-Builder] Two UHF Repeaters - one antenna
Is there any possibility of reversing the TX and RX frequencies of the FM analog repeater? Milt N3LTQ - Original Message - From: Mike Mullarkey To: Repeater-Builder@yahoogroups.com Sent: Sunday, November 16, 2008 12:07 PM Subject: RE: [Repeater-Builder] Two UHF Repeaters - one antenna David, I would say this could be easy but since you have you have a 1.6Mhz split on the Voice repeater it will be tough with one antenna. You are going to have to use ¾ wave cavities for the transmit combiner and a lot of loss. I could not this working out unless you have a hybrid combiner and other items. If you can add another antenna it is a slam dunk as long as you have 30ft of separation between the TX & RX Antennas. Mike K7PFJ -- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of dlake02 Sent: Saturday, November 15, 2008 10:04 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Two UHF Repeaters - one antenna Hello I need some advice - I've searched the group and can't find an answer, so I call on the collected wisdom here, but apologise in advance for taking your time. I have a repeater site that has a single antenna, VHF and UHF. Now, combining the VHF and UHF is fine, although lossy. But, we want to add D-Star at 70cm, which means that I will have two UHF repeaters, two sets of cavities. How do I combine the output of the two cavities prior to feeding to the VHF/UHF combiner ? My frequencies are close: D-Star TX 439.6125 FM RX 434.650 FM TX 433.050 D-Star RX 430.6125 Do I just couple to another T-piece ? Are the cable lengths critical ? Has anyone got experience of doing this ? Thanks in advance for your assistance. David - G4ULF
Re: [Repeater-Builder] GM-300 Repeater (was 900mhz , DTR, 906 to 923.75 MHz FHSS)
Andre, a pair of Motorola GM-300 radios can be interconnected as a repeater using a cable available on eBay for about 10 USD. I have used two radios set up like this, one as the receive and the other as the transmit and they worked just fine as a repeater. No squelch tail on the simple cable, but no problem getting them to work. The cable has a pot to set the repeated deviation, and that is the only adjustment required. 73 - Jim W5ZIT --- On Mon, 11/17/08, ANDRE <[EMAIL PROTECTED]> wrote: From: ANDRE <[EMAIL PROTECTED]> Subject: Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS To: Repeater-Builder@yahoogroups.com Date: Monday, November 17, 2008, 6:56 AM Benjamin, Do you know any brand, model? Thanks
[Repeater-Builder] Re: Two UHF Repeaters - one antenna
Mike 1.6Mhz is the standard split on 70cm, so we have a standard set of cavities for that (yes, they are lossy...) We can move to a 7.6Mhz split, but that moves my voice frequencies to 438.525 RX and 430.925 TX, even closer to D-Star TX and RX ! We only have one antenna - actually, we only have one flag-pole (it's a hollow fibre-glass flagpole on the top of a church steeple - commercial sites are no longer available in the UK due to the high costs). As regards a Hybrid Combiner, I need some help understanding this please ! Thanks David - G4ULF --- In Repeater-Builder@yahoogroups.com, "Mike Mullarkey" <[EMAIL PROTECTED]> wrote: > > David, > > > > I would say this could be easy but since you have you have a 1.6Mhz split on > the Voice repeater it will be tough with one antenna. You are going to have > to use ¾ wave cavities for the transmit combiner and a lot of loss. I could > not this working out unless you have a hybrid combiner and other items. If > you can add another antenna it is a slam dunk as long as you have 30ft of > separation between the TX & RX Antennas. > > > > Mike K7PFJ > > _ > > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of dlake02 > Sent: Saturday, November 15, 2008 10:04 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Two UHF Repeaters - one antenna > > > > Hello > > I need some advice - I've searched the group and can't find an answer, > so I call on the collected wisdom here, but apologise in advance for > taking your time. > > I have a repeater site that has a single antenna, VHF and UHF. Now, > combining the VHF and UHF is fine, although lossy. > > But, we want to add D-Star at 70cm, which means that I will have two > UHF repeaters, two sets of cavities. > > How do I combine the output of the two cavities prior to feeding to > the VHF/UHF combiner ? > > My frequencies are close: > D-Star TX 439.6125 > FM RX 434.650 > FM TX 433.050 > D-Star RX 430.6125 > > Do I just couple to another T-piece ? Are the cable lengths critical > ? Has anyone got experience of doing this ? > > Thanks in advance for your assistance. > > David - G4ULF >
Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS
thank all, Yes, i am im Brazil, and we use GMRS radios but we do not need GMRS licence here. I can use 900mhz dtr or UHF GRMS radios, i have both. But here, the 900mhz is more clean than the uhf, So i thoght to make a digital repeater for this DTR or other fhss radio, but i do not know any a apm, and the repeater that are FHSS (or do not need to be?) John, will you recommend any repeater (small) GRMS? Thanks ALL ( i do not want to buy a UHF comercial Licence to install a big repeater only to me) - Original Message - From: Mike Morris WA6ILQ To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 15, 2008 3:06 PM Subject: Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS He's in Brazil. I don't think they have GMRS there. Mike WA6ILQ At 12:57 AM 11/15/08, you wrote: Get yourself a GMRS license and put up a small 462.5 75 to 462.725 repeater and all of your family could use it. John - Original Message - From: ANDRE To: Repeater-Builder@yahoogroups.com Sent: Thursday, November 13, 2008 11:44 AM Subject: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS Hi all, I have 2 motorola DTR FHSS 900mhz, and i want to bild a repeater for use in my farm thats near my store , 5miles. I know the max watts DTR are 1W, and i didnt find any Repeater or amp for it. I found 900MHz Smartamp, 10W amp that works on FHSS, so i was wondering, Can i use a DTR + simplex 40second rec + smartamp + antenna? Will this amp (its for data) - 12-103 SmartAmp Bi-Directional 900 MHz: 10 Watt Designed for extending the range of 900 MHz wireless radio devices, this is particularly effective when used with Direct Sequence or Frequency Hopping Spread Spectrum. Full output power of 10 W is achieved with only 16 mW input to the amplifier. Above 16 mW input, the SmartAmpT attenuates the input signal power and maintains the output power typically at 10W. The built-in dynamic power sensor in SmartAmpT adjusts the Radio Frequency (RFF) power output level by reading the input signal power. This Automatic Gain Control (AGC) Technology, Teletronics' patented technology effectively making the RF amplifiers "Plug & Play" delivers the maximum output power at various input levels while keeping the distortion at a minimum. Technical Specifications Smartamp Features: 10 Watt Operating Range: 902 - 928 MHz Operating Mode: Bi-directional, TDD Transmit Gain: 28 dB (can be customized to 33dB) Frequency Response: ± 0.75 dB over operating range Output Power: 10 Watt (+40 dBm) nominal TX Input Power: 500mW Receiver Gain: 12 dB typical ±1 dB Noise Figure: 3.5 dB typical Connectors: N-type, female, 50 Ohm Lightning Protection: Quarter Wave Technology DC Surge Protection: Available Power Consumption: <2A @ 12-15 VDC (100% duty cycle) Operating Temperature: Amplifier: -30 °C to + 70 °C 15V DC injector: -30 °C to + 70 °C will work in this way? or anyone knows a repeater for this digital radios(cheap please) Thanks Mattos
Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS
Benjamin, Do you know any brand, model? Thanks - Original Message - From: Benjamin L. Naber To: Repeater-Builder@yahoogroups.com Sent: Saturday, November 15, 2008 4:05 PM Subject: Re: [Repeater-Builder] 900mhz , DTR, 906 to 923.75 MHz FHSS An idea is to use a simple repeater controller connected to the radios' speaker-mic connections. one radio will receive only, one radio will transmit only. Make sure you keep them separated about nine feet or greater if you are going to use the amp on the one that is going to transmit. ~Benjamin, KB9LFZ On Thu, 2008-11-13 at 14:44 -0200, ANDRE wrote: > Hi all, > > I have 2 motorola DTR FHSS 900mhz, and i want to bild a repeater for > use in my farm thats near my store , 5miles. > I know the max watts DTR are 1W, and i didnt find any Repeater or amp > for it. > > I found 900MHz Smartamp, 10W amp that works on FHSS, so i was > wondering, > > Can i use a DTR + simplex 40second rec + smartamp + antenna? > > Will this amp (its for data) - 12-103 SmartAmp Bi-Directional 900 MHz: > 10 Watt Designed for extending the range of 900 MHz wireless radio > devices, this is particularly > effective when used with Direct Sequence or Frequency Hopping Spread > Spectrum. Full output power of 10 W is achieved with only 16 mW input > to the > amplifier. Above 16 mW input, the SmartAmp™ attenuates the input > signal power and maintains the output power typically at 10W. The > built-in dynamic power sensor in SmartAmp™ adjusts the Radio Frequency > (RF) power output level by reading the input signal power. This > Automatic Gain Control (AGC) Technology, Teletronics' patented > technology effectively making the RF amplifiers "Plug & Play" delivers > the maximum output power at various input levels while keeping the > distortion at a minimum. > > Technical Specifications Smartamp > > Features: > > 10 Watt > > Operating Range: > > 902 - 928 MHz > > Operating Mode: > > Bi-directional, TDD > > Transmit Gain: > > 28 dB (can be customized to 33dB) > > Frequency Response: > > ± 0.75 dB over operating range > > Output Power: > > 10 Watt (+40 dBm) nominal > > TX Input Power: > > 500mW > > Receiver Gain: > > 12 dB typical ±1 dB > > Noise Figure: > > 3.5 dB typical > > Connectors: > > N-type, female, 50 Ohm > > Lightning Protection: > > Quarter Wave Technology > > DC Surge Protection: > > Available > > Power Consumption: > > <2A @ 12-15 VDC (100% duty cycle) > > Operating Temperature: > > Amplifier: -30 °C to + 70 °C > 15V DC injector: -30 °C to + 70 °C > > will work in this way? > or anyone knows a repeater for this digital radios(cheap please) > > Thanks > > Mattos > > > > >
[Repeater-Builder] F/S: MICOR Unified Chassis UHF
I have a number of (approx 12) UHF MICOR Unified Chassis Community Repeater stations in various states of disassembly. Some are complete other than cards and channel elements; others have been scavenged to various degrees for parts. I also have two power amplifiers (I believe they are both 75W units). PLEASE KNOW: these are DISASSEMBLED stations - there are NO power supplies, channel elements or cabinets available. Some control cards are also available. Before I try to peddle this stuff at a popular auction site, I figured I'd offer to the readers of these lists first. Photos can be provided upon request, and first inquiries get best choice as to which chassis they can obtain. For what it is worth, I was able to reconstitute one of these into a working GMRS repeater. However, these stations were disassembled when I obtained them, so they are sold "as is". NO guarantee is offered. All items are located in the Southwest suburban Chicago area (Joliet), so pick up is probably more of a viable option than shipping. If you are interested, contact me off-list at: n9wys <(at)> ameritech <(dot)> net and I will attempt to answer any questions you may have. Mark - N9WYS
Re: [Repeater-Builder] Versatone chip wanted
Tom Clarke wrote: > Anyone out there got a spare 146.5 Hz GE Versatone > chip (19C320291G1) they would like to pass on? This is for an MVP. > I have a 138.5 chip in there now. Buy or trade. > > 73 de Tom/W4OKW You mean 146.2. And 138.5? That's an odd one...but I've seen some...81.0 and 188.0 have come up a few times...
RE: [Repeater-Builder] Decibel DB-4076 duplexers
There were a number or revisions to the DB-4076 over the years - here are at least 4 different cable lengths/sets depending on the vintage that I'm aware of. There is no magic formula. --- Jeff WN3A > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] On Behalf Of James Adkins > Sent: Sunday, November 16, 2008 6:08 PM > To: repeater-builder > Subject: [Repeater-Builder] Decibel DB-4076 duplexers > > I just got a set of Decibel DB-4076 duplexers, currently > tuned to 452.xxx and 457.xxx Mhz. It has not cables, however. > > Does anyone know the length of the interconnect cables needed > for these duplexers, or would I just need to make a 1/2 > electrical wavelength cable for each of the 4 cables? > > Thanks, > > -- > James Adkins, KB0NHX > > > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.175 / Virus Database: 270.9.0/1770 - Release > Date: 11/17/2008 8:48 AM > > >
[Repeater-Builder] Re: MOTO R-100 Problem
I sent the jumper information direct to Brian. JU14 IN, JU16 and JU17 out, solder in jumpers on the 'main' board. TP29 is the Receiver enable logic level TP31 is the Exciter audio enable logic level. > -Original Message- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Brian > Sent: Saturday, November 15, 2008 4:05 PM > To: LMR > Subject: [LMR] MOTO R-100 Problem > > Dear group: > I have a problem with a Motorola R-100 repeater. > During the hang time, the rxvr is switched to COS, and it is annoying to > hear any co-channel traffic until drop-out. > Is there a jumper or dip sw. that will keep the rxvr PL on full time? > Guidance solicited, and surely appreciated. > Brian >
