[Repeater-Builder] Re: 23cm antenna for DSTAR
--- In Repeater-Builder@yahoogroups.com, johnmichaelwelton [EMAIL PROTECTED] wrote: Any recommendations for a 1.2GHz antenna to be used in a DSTAR DD/DV application at a commercial site (hospital)? John/N4SJW Charleston, SC I do not have a DStar repeater but just analog voice and have had a Comet GP-21 up on the top of a 275' tower since june 02. Its been a solid performer for me. I would not recommend a multiband omni as they are usually multi section antennas and that leads to more going wrong with it over time. The base of the tower is at about 100' above sea level. My coverage with the GP-21 is about 25 miles out for the 10watt mobiles over mostly flat terrain. Portables at 1 watt out to about 10 to 15 miles if you pick your spot well. See info below .dan n2aym http://www.rigpix.com/antennas/comet_gp21.htm GP-21 Specs Mono Band 1240-1300MHz Base/Repeater Antenna Gain Wave: 14.9dBi 1#8260;2 wave x 21 VSWR: 1.5:1 or less Max Power: 100 watts Length: 8' Weight: 2 lbs. 8 ozs. Mounting Mast Diameter: 11#8260;4-21#8260;2 Connector: N-Type Construction: Single-piece fiberglass
[Repeater-Builder] Re: IFR 1900 Schematics
Eric - I too am looking for doc on this svc mon. I need the Service Calibration doc you have and hope you can help me out with some copies or steer me in the direction of your supplier. TIAdan n2aym NOTE: Please email me at my qrz listed email address. --- In Repeater-Builder@yahoogroups.com, w2zt [EMAIL PROTECTED] wrote: Does anyone know of a source for the IFR-1900 schematics? I have each of the Service, Calibration Operating manuals, however, schematics are not within them. I assume this is because Aeroflex still supports the units for a lucrative fee and doesn't want competition. Thanks, Eric
[Repeater-Builder] Re: RF Problem with new repeater
Sounds like it may be the internal switching power supply malfunctioning and emitting much noise. Try running it on DC and see if the noise goes away.dan n2aym --- In Repeater-Builder@yahoogroups.com, ki4ggh [EMAIL PROTECTED] wrote: Hi group, I seem to be having an RF Problem with a new Icom FR4000 Repeater. The repeater is letting out a hissing noise when I listen to it on a HT or my mobile radio. The hissing noise sounds more like a squelch that is opened up. When I get about 300 feet from the repeater the noise is gone. It does not key the transmiter. This is why I am puzzled. The only way I have found to get arround it is turn my squelch way up on my HT to remove the noise. When I key up my HT the noise drops out while the repeater is transmitting. The repeater and repeater tower is at my home. If it was several miles out of town I would not be emailing you. I have mounted it in a metal case, grounded the repeater by the grounding screw, grounded the coax by twisting copper around the coax sheild, grounded the repeater cabinet. I first thought that the problem was from the duplexers. Not so, I took the duplexers out of line and still noise. The only way to remove the noise is to turn off the repeater. Something I don't won't to do. Any thoughts ???
[Repeater-Builder] Re: New QRM on 220 MHz.......?
Yes Roger - I do hear this on 220 from time to time and more so in the dense city environments. If you are going to search for Cable TV leakage listen to 221.750(CATV CH 23 Audio Carrier) or 223.250(CATV CH 24 Video Carrier). These will yield you the best signal levels. Good luck..dan n2aym --- In Repeater-Builder@yahoogroups.com, res1q6fs [EMAIL PROTECTED] wrote: As I mobile around while monitoring the output of my 224.18 MHz repeater as I have done for many years (it has been on the air since the late 70's), I have never heard any kind of strange signals on its output freq. or any 220 output freq. I have a 3 band Kenwood in the car and am used to hearing signals break the squelch on certain 2M and 440 frequencies, but never 220. The past few weeks, I have heard signals (CW, no modulation noticed) of a fairly strong nature break the squelch on 224.18 MHz, much like the signals that break the squelch on certain 440 repeater output freqs, which were eventually traced to cable TV leakage. I am wondering if anyone else has heard signals of this nature on the 220 band? I know of three places within a few miles of my house that emit these signals. I am going to take my talkie out one of these days ands see if I can home in on one of these new signals. Roger W5RD
[Repeater-Builder] Re: TX RX Systems Model Number Nomenclature
Yes, thanks Mike - I already scanned through that - but that is for duplexers. I am looking for the same thing but for the entire tx rx product line if it exists..dan n2aym --- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote: At 06:55 PM 12/28/07, you wrote: Anyone know where I can find the model number decoding matrix for the TX RX product lines? I have been through there web site and they dont seem to offer much info on this subject? If you have any idea where I can find this info please email me at my address on qrz.com as I do not get emails from this group or check here often - TIA.dan n2aym Look at the Antenna Systems page at www.repeater-builder.com Mike WA6ILQ
[Repeater-Builder] Re: TX RX Systems Model Number Nomenclature
Thanks Mike - if you could email it to my email address on qrz i would appreciate it and perhaps you could post it on the files section of this board for the benefit of everyone.dan n2aym --- In Repeater-Builder@yahoogroups.com, MikeDeWaele [EMAIL PROTECTED] wrote: I think I can provide a scan of model numbers if you can wait till later today when i get my honey do list done. I have a complete txrx catalog with all that information in it. Mike KA2NDW -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of fineshot1 Sent: Saturday, December 29, 2007 7:00 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: TX RX Systems Model Number Nomenclature Yes, thanks Mike - I already scanned through that - but that is for duplexers. I am looking for the same thing but for the entire tx rx product line if it exists..dan n2aym --- In Repeater-Builder@yahoogroups.com, wa6ilq@ wrote: At 06:55 PM 12/28/07, you wrote: Anyone know where I can find the model number decoding matrix for the TX RX product lines? I have been through there web site and they dont seem to offer much info on this subject? If you have any idea where I can find this info please email me at my address on qrz.com as I do not get emails from this group or check here often - TIA.dan n2aym Look at the Antenna Systems page at www.repeater-builder.com Mike WA6ILQ
[Repeater-Builder] TX RX Systems Model Number Nomenclature
Anyone know where I can find the model number decoding matrix for the TX RX product lines? I have been through there web site and they dont seem to offer much info on this subject? If you have any idea where I can find this info please email me at my address on qrz.com as I do not get emails from this group or check here often - TIA.dan n2aym
[Repeater-Builder] Re: Too fast squelch on GE Master
--- In Repeater-Builder@yahoogroups.com, wa5luy [EMAIL PROTECTED] wrote: We are using a GE Master II with an RLC Club controller for our 444.600 repeater. On weak signals the repeater chops words. I have determined this is due to very fast action of the CAS turning the controller audio off and on. Looking at the schematic, U603 has internal fast and slow modes. There is an adjustment, R622 that I can't find in the book. Does anyone know how to slow down or improve the squelch action? I have been using the RUS rather than CAS signal and have never had a problem with that(never needed adjustment).dan n2aym
[Repeater-Builder] Re: COS output for Kenwood
Jeff - If you have a TSU6/KQT8 CTCSS decoder installed you can get an active high from the foil side pin 4 marked as SDO in the service manual(assuming you have one).dan n2aym --- In Repeater-Builder@yahoogroups.com, jkstrsn [EMAIL PROTECTED] wrote: I have a TM-431A which I want to use as a half-duplex link. I can easily get audio in and output, but I'm stumped on how to get a voltage change when the squelch opens for COS (Carrier-operated-squelch) Ideally I'd like a voltage that swings only when the CTCSS is detected as well as squelch open, but I'd settle for one that is just the squelch. My controller is an ICS linker. Does anyone know the proper point to connect to, or does anyone have a service manual for this unit? Thanks, Jeff WB0LRX
[Repeater-Builder] Re: IOTA Power Supplies
--- In Repeater-Builder@yahoogroups.com, Paul Metzger [EMAIL PROTECTED] wrote: I don't know about IOTA switching supplies, but my Newmar PM-12-70 switching supply causes birdies all through my HF gear here at home. I also used a bank of five brand new 12V batteries tied to a Vector VEC1093A battery charger instead of the Newmar, and that charger as well is a switcher that also caused birdies all through my HF gear. I should have kept my old 70 Ampere non switching supply. Oh well, a lesson learned. Paul Metzger KQ6EH Paul - I cant speak to the switchers that you mentioned above but the IOTA's are very well designed and some of the fellas I know that have used them the older Todd switching supplies to power there HF equipment have never had a problem with them causing birdies. Heck, alot of HF gear now a days has switching supplies some of which are built in as an option. Many repeaters that I am aware of have switching supplies powering them. This is not as uncommon as you make it sound..dan n2aym
[Repeater-Builder] Re: IOTA Power Supplies
--- In Repeater-Builder@yahoogroups.com, Andrew [EMAIL PROTECTED] wrote: Has anybody had experience with switching power supplies from IOTA Engineering? I am looking at their DLS-90 90amp model. They seem to be worth the money. A lot cheaper than the fancy samlex supplies. Pros/Cons? Andy KC2GOW http://www.sirepeater.com I use a DLS 75 on one of my repeaters and a DLS 55 on another. They are excellent quality supply/chargers. My 75 has the external IQ4 smart charge module charging two 75Ah AGM batteries in parallel and has performed flawlessly obsorbing power hits since install in June 02. I dont think you can go wrong with these they are getting pretty reasonable prices on ebay lately(picked up the 55 for less than $100). .dan n2aym
