RE: [Repeater-Builder] Re: NFCC votes to recommend FCC treat all repeaters as repeaters
You just showed your age. Big Grin! Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Kris Kirby Sent: Saturday, September 22, 2007 11:00 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: NFCC votes to recommend FCC treat all repeaters as repeaters On Sat, 22 Sep 2007, MCH wrote: To compare D-STAR to SkyCommand is like comparing apples to a DeSoto. What's a DeSoto? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] * WAR IS PEACE * FREEDOM IS SLAVERY * * IGNORANCE IS STRENGTH * KETCHUP IS * * A VEGETABLE * Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.487 / Virus Database: 269.13.27/1020 - Release Date: 9/20/2007 12:07 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.487 / Virus Database: 269.13.27/1020 - Release Date: 9/20/2007 12:07 PM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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/
[Repeater-Builder] Re: Mitrek Question
No problem Randy...
Mitrek radios make good repeaters as long as you don't run a lot
of power within the chassis. It's probably better to run two radios
(one tx, one rx) if you plan to use the high power output tx
radio.
I buy my crystals direct from Bomar and re-rock the channel elements
myself. Although there is a $50 min order I just buy some standby
crystals often on other interesting frequencies. Bomar charges about
$15 per crystal, which is a very fair price. Sometimes you can go in
with other folks to make the min order amount.
cheers,
skipp
Randy Thomas [EMAIL PROTECTED] wrote:
Hi Skipp
Thanks for the info, Pretty well what we figured but thought
we would ask. We got the Mitrek finished today and it seems
to be working fine. Waiting on the Channel Elements to arrive
to finish up the job.
Randy
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, September 23, 2007 12:27 PM
Subject: [Repeater-Builder] Re: Mitrek Question
Hi Randy,
Can't give you the details of the specific resistor requirements
without knowing more about your specific controller mod... but I
can tell you some tricks to try with the 10K Pots (controls) you
have available.
You can place resistors in series with the pot leads to make
the 10k pot a 25k value with slightly reduced center wiper lead
adjustment range.
If you place one 15k fixed resistor on one of the outside pot
leads the control becomes a 25k pot with a wiper travel only
over the 2/5th of it's normal range. If you place the resistor
on one end the 2/5 range is on the low side, the other side the
2/5 range is on the high side.
and you can center the pot wiper range by placing two
(equal) 7.5 k resistors (or anything close) on each pot outside
lead. The available 2/5 wiper range will be in the center of
the entire 25k value.
If you get the idea of ratios... placing resistors in series on
the pot solder terminal outside leads in various combinations will
give you the 2/5th (ratio) operation of a regular 25K pot.
Normally in a repeater/base conversion (operation) you only need
final adjustments well within a 2/5th range. So you can have a bit
of free lunch in this example. The only small trick is to figure
out where/how to best select and place the extra fixed resistor(s)
onto the potentiometer outside solder posts/terminals.
cheers,
s.
In interfacing the Mitrek to a Controller it calls for 25k
pots for the Squelch and Volume controls along with a 3.3
and 10k resistors. All I could round up here was 10k pots
which I read in one of the listings would work fine but it
never said anything about changing out the 3.3 and 10k resistors
for something differnt if the 10k pots was used. Can
someone set me straight, I have only had one pot of coffee
so far and it takes at least two to get me going.
Randy
[Repeater-Builder] FW: Uniden MRS-915 Repeater
I originally posted this request on the Manual_Exchange list, but have gotten no replies - so I will try here. Please pardon the bandwidth if this is OT... PLEASE - I'm looking for any manuals - or any other data - for the Uniden MRS-915 series repeater. I have been given one in pieces and need the reassembly instructions, if nothing else. I plan on converting it to Amateur band, if possible. And maybe a key for the drawers??? This repeater looks like two Mitrek-style mobile drawer units mounted on a two-tiered shelf for rack mounting; interconnecting (AKA: control head) cables are attached to a circuit board-end connector; controller is where the board-end connector attaches to, mounted on a separate rack-mount panel. This also came with another box labeled Trunking Controller. If anyone has any information on this repeater, I'd be much obliged!! Thanks in advance... Mark - N9WYS n9wys at ameritech dot net
Re: [Repeater-Builder] VHF Repeater Antenna
I have had great service out of an Antennex 5 dbd UHF fiberglass antenna. It is mounted near the top of a 2000' tower and has been up for maybe 8 years with no problem at all. It was to be a temporary replacement for a DB420 but since it is working,I just never got around to swapping them out. It doesn't have the same coverage but is holding up well. I have had problems with DB 224s on the tall tower. The elements break due to vibration and ice. Since lightning has not been much of an issue, I have been thinking of replacing the 224s with fiberglass jobs, either Antennex or Stationmasters. But Antennex doesn't seem to offer a 5 dbd model for the hamband. Dave BaughnDirector of EngineeringThe University of AlabamaCenter for Public Television and RadioWVUA/WUOA-TV WUAL/ WQPR/ WAPR FMBox 870150195 Reese Phifer Hall, 901 University Blvd.Tuscaloosa, Alabama 35487205.348.8622 cell 205.310.8798[EMAIL PROTECTED] KX4I "kfd29" [EMAIL PROTECTED] 9/22/2007 9:02 PM Looking to replace our current VHF Comm. repeater antenna w/ a higher quality antenna. Orginally wanted the DB series 4bay dipole but not sure if our current install setup will hold such a beast! Another thought was using the Antenex series (YDA1504) on a lighter weight mast.Any pros/cons w/ the Antenex product? Or anyone ever sidemount a db dipole mast to a building?image/gifimage/xxx
[Repeater-Builder] Duplexers
I am having some receive problems on my repeater and I am thinking that it might be desense. I am on 2M running a MASRII repeater with a Decibal Products band reject 6 can duplexer. While I can key the repeater from a pretty good distance the audio that makes it through the repeater drops off pretty quickly. I just had the duplexers tuned and they are tuned very well. So on to my question. If I were to take and seperate the recv cans from the xmit cans and run to 2 seperate antennas would that mess up the duplexer tuning? will 20' of vertical seperation plus the cans and the fact that I would be running through seperate cable, make a difference? Thanks, Vern KI4ONW
Re: [Repeater-Builder] Duplexers
Time for an isolated TEE test with a dummy load. Why did you have the duplexers tuned ? Was there a problem prior? You should be able to split the duplexer without any trouble - just mark things so you can go back as it was. Best luck and 73, Steve NU5D [EMAIL PROTECTED] wrote: I am having some receive problems on my repeater and I am thinking that it might be desense. I am on 2M running a MASRII repeater with a Decibal Products band reject 6 can duplexer. While I can key the repeater from a pretty good distance the audio that makes it through the repeater drops off pretty quickly. I just had the duplexers tuned and they are tuned very well. So on to my question. If I were to take and seperate the recv cans from the xmit cans and run to 2 seperate antennas would that mess up the duplexer tuning? will 20' of vertical seperation plus the cans and the fact that I would be running through seperate cable, make a difference? Thanks, Vern KI4ONW
Re: [Repeater-Builder] Duplexers
I would be quite surprised if you are NOT having desense with a Mastr II and a 6 can notch only duplexer at 600 khz Typically a 6 can reject only duplexer is not sufficient isolation at 600khz for 2 meters with a solid state PA.. Vertical separation or a pass/reject duplexer will be needed. 6 can notch only's were designed in a time where they were sufficient on Mastr Pro or similar tube PA's as they were significantly quieter in band noise off freq...Not so with a Mastr II or eq. these days... A 4 can Pass/reject is just barely enough and usually takes a dump if you try to run a Preamp.. on 100w or so repeaters... A 6 can pass/reject is the ticket if you want to really get the receiver working to it's fullest, or separate antennas can help.. There are isolation curves for antenna spacing at the repeater builder website... Typically the 6 can notch will make 65-80 db isolation.. from my experience you need at least 100db isolation on 2m probably more like 110 -120...Our TX/RX 6 can pass/reject is in the neighborhood of -127 db at 600khz on 2 meters You are on the right track Doug KD8B mailto:mung%40highwayusa.com[EMAIL PROTECTED] wrote: I am having some receive problems on my repeater and I am thinking that it might be desense. I am on 2M running a MASRII repeater with a Decibal Products band reject 6 can duplexer. While I can key the repeater from a pretty good distance the audio that makes it through the repeater drops off pretty quickly. I just had the duplexers tuned and they are tuned very well. So on to my question. If I were to take and seperate the recv cans from the xmit cans and run to 2 seperate antennas would that mess up the duplexer tuning? will 20' of vertical seperation plus the cans and the fact that I would be running through seperate cable, make a difference? Thanks, Vern KI4ONW
Re: [Repeater-Builder] Duplexers
I had them tuned because I had just bought them and didn't really trust that they were right. They were very far out so it's good that I got them tuned. I was having the same problem as now though very poor receive. Right now I have a radio on there for receive that was getting about 30 miles of coverage as an Echolink link node with home made antenna and now hooked up to the repeater using a big Tram Dualband antenna through the duplexer I am lucky if I am getting 3 miles. So I don't think the repeater's built in receiver is the problem which leads me to either desense or a bad antenna cable. Transmit is getting out very well and the swr is almost 1 to 1 so I think the cable is OK. I am running LMR 400 up the tower 95% of the way. I just have a short coax jumper that goes into the antenna. I am going to try to split them and see what I get. Thanks, Vern KI4ONW On Mon, 24 Sep 2007 12:50:48 -0500 Steve S. Bosshard (NU5D) [EMAIL PROTECTED] wrote: Time for an isolated TEE test with a dummy load. Why did you have the duplexers tuned ? Was there a problem prior? You should be able to split the duplexer without any trouble - just mark things so you can go back as it was. Best luck and 73, Steve NU5D [EMAIL PROTECTED] wrote: I am having some receive problems on my repeater and I am thinking that it might be desense. I am on 2M running a MASRII repeater with a Decibal Products band reject 6 can duplexer. While I can key the repeater from a pretty good distance the audio that makes it through the repeater drops off pretty quickly. I just had the duplexers tuned and they are tuned very well. So on to my question. If I were to take and seperate the recv cans from the xmit cans and run to 2 seperate antennas would that mess up the duplexer tuning? will 20' of vertical seperation plus the cans and the fact that I would be running through seperate cable, make a difference? Thanks, Vern KI4ONW
[Repeater-Builder] Digital Voice Recordings
Hello all, I have added more digital voice vs FM and SSB sound bites to the N6DVA web site (decoded and un-decoded). http://www.hamradio-dv.org ALINCO AOR D-Star Motorola P25 Motorola Mototrbo Have Fun ! Paul Metzger K6EH Digital Voice Amateur Radio Association N6DVA
[Repeater-Builder] UHF Super StationMaster 1151-2N For Sale
Hi All, Repeater Builder has always been a great source of info for me, so I was hoping one of you might be able to point me in a better direction. Here in Massachusetts, several 440 MHz repeaters (including mine) had to shut down due to PAVE PAWS radar. I had JUST purchased a brand new StationMaster and had it up for about a week. Now it has been taken back down off the tower and I am looking to sell it. I figured just mentioning it here might grab someone's attention looking for one, but otherwise, is there any other forum or place that you could recommend listing it for sale? I am hard pressed to ship it out obviously because it is 15 feet long, so I would have to meet someone half way with it or have someone local pick it up. I'm in Dartmouth, MA between Providence, RI and Cape Cod, MA. Any input would be helpful... I was thinking eBay, but I am not sure. 73, Rick, W1RJC
RE: [Repeater-Builder] Duplexers
Vern, Did this problem exist before you had the duplexer tuned? Was anything at all done to your repeater system just before the problem was noticed? A band reject (notch) duplexer may be incapable of performing even satisfactorily at 2m. Please advise the model number of your duplexer, so we can understand your situation. Are all of your cables double-shielded? It might be a good idea to perform a noise-floor test using an iso-tee and a service monitor. Some helpful information about investigating desense problems can be found here: www.repeater-builder.com/ge/datafile-bulletin/df-10002-02.pdf 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Monday, September 24, 2007 7:02 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Duplexers I am having some receive problems on my repeater and I am thinking that it might be desense. I am on 2M running a MASTRII repeater with a Decibel Products band reject 6 can duplexer. While I can key the repeater from a pretty good distance the audio that makes it through the repeater drops off pretty quickly. I just had the duplexers tuned and they are tuned very well. So on to my question. If I were to take and separate the recv cans from the xmit cans and run to 2 separate antennas would that mess up the duplexer tuning? will 20' of vertical seperation plus the cans and the fact that I would be running through separate cable, make a difference? Thanks, Vern KI4ONW
Re: [Repeater-Builder] Duplexers
Decibel did make a 6 cavity notch duplexer - 4 full sized cavities - that would work nicely on a 110 Watt M2 station @ 600 kHz. Isolated TEE test into a dummy load - how bad is the receiver desense ? If you don't have some test equipment - signal gen, dummy load, and a TEE fitting with the side pin cut away (makes 60 dB lossy coupling, there abouts) you probably will need to find someone who does locally that can help. 73, Steve NU5D Eric Lemmon wrote: Vern, Did this problem exist before you had the duplexer tuned? Was anything at all done to your repeater system just before the problem was noticed? A band reject (notch) duplexer may be incapable of performing even satisfactorily at 2m. Please advise the model number of your duplexer, so we can understand your situation. Are all of your cables double-shielded? It might be a good idea to perform a noise-floor test using an iso-tee and a service monitor. Some helpful information about investigating desense problems can be found here: www.repeater-builder.com/ge/datafile-bulletin/df-10002-02.pdf 73, Eric Lemmon WB6FLY
[Repeater-Builder] Replacement Ferrite Cores
Greetings All - Looking for some replacement ferrite cores. Need 2 sizes: 6mm x 3mm and 8mm x 4.5mm. Need a couple of each size. Can anyone out there provide a source for these or maybe part with a few from the personal stock ?? Thanks Doug N3dab
[Repeater-Builder] Looking for Midland Manual
Greetings Does anyone have a manual for a Midland 70-342 BXL or AXL(?) mobile radios? ~Benjamin, KB9LFZ Moderator Central Get answers to http://us.ard.yahoo.com/SIG=12jflp78f/M=493064.10729651.1142.8674578/D=groups/S=1705063108:NC/Y=YAHOO/EXP=1190690584/A=4699084/R=0/SIG=115gt68pf/*http://moderators.groups.yahoo.com/ your questions about running Y! Groups. . winmail.dat
