Re: [Repeater-Builder] Mitrek lowband PTT questions
what would it take short of some cash to have one sent to me here in New Zealand as a one off key, not that i need one, i am told i am a Hoarder Marcus On Sun, Sep 5, 2010 at 4:38 PM, KP3FT kp...@yahoo.com wrote: Hi all, Thanks for the previous advice on the Mitrek lockout key; I ordered one off Ebay and it worked fine. Opened the radio up and everything looks visually OK, all the channel elements are there, no burned components, etc. I read through the Repeater-Builder's Mitrek webpages and figured out the pins for hookup. I was wondering if anyone could look over some sections of the Mitrek schematichttp://groups.yahoo.com/group/Repeater-Builder/files/Mitrek%20Lowband/ I posted in the Files section under the folder Mitrek Lowband, regarding the PTT circuit. I circled the areas in question in red and blue. (I also hyperlinked to the various schematic sections in this message). I just want some verification before I start wiring up the radio. I found another website where the author said to jumper pin #1 to pin #25 on the interconnect board connectionhttp://f1.grp.yahoofs.com/v1/wBWDTM_dzohoZJ1M25svBvhmyUk3YStFZKcbHdVjzcHCTQSgFE9U0-wFOU3PHUQL3NIWEGUG1ndFPkhYrLdul9o1/Mitrek%20Lowband/interconnect_board.jpg , and then just ground pin #13 of the cable connector (or pin #13 on the front of the radio in my case) for PTT operation. (Pin #24 of the interconnect board connector is the same as pin #13 of the cable connector) My questions are: 1. What does the jumper do and is it beneficial for beacon operation? Here is the schematic section http://f1.grp.yahoofs.com/v1/wBWDTDg1U9VoZJ1MJmrSx6917ZszwfFtwKxh8c5tPrKp1IiKeb_dd_z6o52LjBRH6eMjcKXGvRCwASnBIgIJ8PUE/Mitrek%20Lowband/mitrek_PTT.jpg of the PTT circuit. 2. I will be using the Mitrek solely as a transmitter beacon, so RX is not necessary. I'll have to disable the antenna relayhttp://f1.grp.yahoofs.com/v1/wBWDTJ0GE-FoZJ1MoIPDEYBXLqbbFZph6Eymc3u9dFQYPG2vhGbVYg92QCtUhDuNVVr89_tTKgsBysS0H3B3Q5eW/Mitrek%20Lowband/Antenna_Relay.jpg because it won't last long during constant beacon operation, plus it isn't even needed. Can I just disable the relay by cutting power to it and wire the PA output directly to the antenna jack (two points circled in blue)? Or, just keep voltage on the relay so the RX section is always switched out and the TX switched in? Probably easier that way. 3. The radio has the PL board installed; can I just remove it so it doesn't introduce anything into the carrier, or just leave it alone? I can't tell from reading through the various websites and the schematic if the PL-encode is enabled automatically or if it needs switching on, in which case I will leave it off. Thanks for any advice. Jeff KP3FT
Re: [Repeater-Builder] Mitrek problem
On Mon, 1 Mar 2010, kernkampj wrote: Recently I had a problem with a Mitrek radio, The RX channel element would not reliably start oscillating on power-up. In my experimenting, I discovered that the problem related to the power supply I used. I had four power sources - two linear supplies, one switcher, and a battery. One of the linears and the battery worked fine. The other linear and the switcher created the non-start problem. I finally noticed that the radio has two internal power sources for the channel element (9.5 Reg and 9.5 switched), and wondered if the timing of the two sources could be the problem. So I slowed down the 9.5 switched source, and that cured it. The channel element now starts every time from any of the power supplies. For those interested, I added a 100uF cap from the base of Q1 (the receiver 9.5V Switched supply) to ground. This slowed down the voltage output of the 9.5 switched source. You might have one or more electrolytic capacitors which have dried out. I think the last Mitrek rolled off the line before I was born, which is longer ago than I'd like to admit. -- Kris Kirby, KE4AHR Disinformation Analyst
RE: [Repeater-Builder] Mitrek
Right you are! Go here: www.com-spec.com/insheet/mitrek2.pdf 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Sunday, December 14, 2008 6:09 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek Contact Communications Specialists. I believe that they make one. Chuck WB2EDV - Original Message - From: Randy k8kh...@earthlink.net mailto:k8khw-1%40earthlink.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: Sunday, December 14, 2008 8:58 PM Subject: [Repeater-Builder] Mitrek Can anyone tell me where I can find a cable for a TS64 to a Motorola Mitrek? Randy
Re: [Repeater-Builder] Mitrek
Contact Communications Specialists. I believe that they make one. Chuck WB2EDV - Original Message - From: Randy k8kh...@earthlink.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 14, 2008 8:58 PM Subject: [Repeater-Builder] Mitrek Can any one tell me where I can find a cable for a TS64 to a Motorola Mitrek Randy Yahoo! Groups Links
Re: [Repeater-Builder] Mitrek
At 05:58 PM 12/14/08, you wrote: Can any one tell me where I can find a cable for a TS64 to a Motorola Mitrek Randy Build it yourself. The full TS64 data package is on the Com-Spec page at www.repeater-builder.com and the Mitrek info is there as well (I put it there after a bunch of folks asked for it after reading my Mitrek Interfacing writeup). Mike WA6ILQ
Re: [Repeater-Builder] Mitrek
Comm Spec has a prewired cable available. See http://www.com-spec.com/insheet/mitrek2.pdf Milt N3LTQ - Original Message - From: Randy k8kh...@earthlink.net To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 14, 2008 10:27 PM Subject: [Repeater-Builder] Mitrek At 05:58 PM 12/14/08, you wrote: Can any one tell me where I can find a cable for a TS64 to a Motorola Mitrek Randy Build it yourself. The full TS64 data package is on the Com-Spec page at www.repeater-builder.com and the Mitrek info is there as well (I put it there after a bunch of folks asked for it after reading my Mitrek Interfacing writeup). Mike WA6ILQ Mike We looked at the information on www.repeater-builder.com before posting this message problem is by the time we buy the plug for the radio and the ts64 buy the wire and what ever else we need I would be better off to simply buy it. We used to make all of this stuff but things change. Randy Yahoo! Groups Links
Re: [Repeater-Builder] Mitrek on 6 meters.
At 12:50 PM 07/17/08, you wrote: Does anyone know if the Mitrek will tune up and work on 6 meters? One source says the top freq is 50 mhz, and another says it is 54 mhz. My model number is T81JJA4900CK and HUB1054C Thanks, Mick, KB4UPI Factory spec is 50MHz, component tolerances let some individual radios go higher. Look at www.repeater-builder.com on the Motorola then Mitrek page and you will find articles on how to swap capacitors to let it go there. Short version, yes, it will go. Mike
Re: [Repeater-Builder] Mitrek on 6 meters.
Mick, By Mot spec the upper limit is 50 MHz. I have a mitrek that I simply bought the 52.525 crystals, installed in the supplied ch ele which was on the 143 range and tuned and all worked fine without any mods. Do need the manual or tuning procedure and if you got Mot test set makes it easier. I've only done one of these and as with any component there are tolorances. So one might tune and another might not. Just have to try. As in another posting mods were done to make it move. 73, ron, n9ee/r From: mickupi [EMAIL PROTECTED] Date: 2008/07/17 Thu PM 03:50:37 EDT To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek on 6 meters. Does anyone know if the Mitrek will tune up and work on 6 meters? One source says the top freq is 50 mhz, and another says it is 54 mhz. My model number is T81JJA4900CK and HUB1054C Thanks, Mick, KB4UPI Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
Re: [Repeater-Builder] Mitrek UHF high power manual
I can try to scan the higher power amplifier pages out of mine to add to it. On Mar 20, 2008, at 11:12 AM, George Henry wrote: I have the 30/50 watt manual, already scanned. Problem is, it's 18 MB, and most ISP's won't allow a message attachment that large. I sent it to Mike Morris in several parts a month or so ago, but I guess he hasn't gotten it posted to the RB site yet Anybody else got a server they can host it on? George, KA3HSW / WQGJ413 -Original Message- From: Ron Wright [EMAIL PROTECTED] Sent: Mar 20, 2008 8:28 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek UHF high power manual Justin, For $15 on e-bay at: http://cgi.ebay.com/MOTOROLA-MITREK-UHF-MANUAL-68P81037E75-B_W0QQitemZ120193561771QQihZ002QQcategoryZ15050QQrdZ1QQssPageNameZWD1VQQ_trksidZp1638.m118.l1247QQcmdZViewItem It is for 30/50 W. Normally the only difference is the PA so the particulars of the higher power PA would be easy to find. As for scanning in the manual is over 100 pages. 73, ron, n9ee/r
RE: [Repeater-Builder] Mitrek UHF high power manual
Justin, The 6881039E80 document is not a complete manual in itself, but a supplement to the low-power manual 6881037E75. Both of them are out of print and NLA, but the low-power manual can be downloaded here: www.repeater-builder.com/motorola/manuals/68p81037e75-b-uhf-lp-mitrek.pdf 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Justin Sent: Thursday, March 20, 2008 3:27 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek UHF high power manual Hi there, I'm looking for the manual for the UHF high power (406-512mhz) - T64/74JJA-A. Repeater-builder had the part number for the manual listed as: 68-81039E80. According to the site it is no longer available from Motorola, and google has been no help in finding it. Even under the mitrek section of this group I didn't see anything. If anybody has a copy of this manual that they could scan, that would sure make my life a bunch easier. Thanks, Justin (KG6ZJM)
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
roger wilcox!!! --- [EMAIL PROTECTED] wrote: Ted, I will take one of the kits also. Please save me one if you would. I will include the payment in with the coax purchase. Thanks, Collin -Original Message- From: Tom Manning [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tue, 4 Mar 2008 8:31 pm Subject: Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY Hello Ted I see your Mitrek metering kit and will take one. I will pay via Paypal if you will tell me how. Thanks . Tom Manning, AF4UG 4349 Barclay Pl PaCE, fL 32571-2203 - Original Message - From: Ted Bleiman K9MDM - MDM Radio To: repeater-builder@yahoogroups.com Sent: Tuesday, March 04, 2008 12:30 PM Subject: [Repeater-Builder] MITREK TUNE UP ACCESSORY GENTLEMEN; take a look at www.mdmradio.com I just placed there a kit for metering Mitrek as well as several other Motorola radios. the TLN4420 metering kit was originally for the consolette base station Mocom 70 super station etc. It would make a nice project to build your self a test set for the Mocom 70- motrac-mitrek etc cheap and almost all the work has been done. a drill a soldering iron with the hot end marked in RED,a few tools a little technical know how and i sound like Alton Brown of Food channel. anyhow take a look. its cheap but only 3 exist so don't waste time www.mdmradio.com. tnx and best of 73'ses to all mdm ted Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL __ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
At 10:30 AM 03/04/08, you wrote: GENTLEMEN; take a look at www.mdmradio.com I just placed there a kit for metering Mitrek as well as several other Motorola radios. the TLN4420 metering kit was originally for the consolette base station Mocom 70 super station etc. It would make a nice project to build your self a test set for the Mocom 70- motrac-mitrek etc cheap and almost all the work has been done. a drill a soldering iron with the hot end marked in RED,a few tools a little technical know how and i sound like Alton Brown of Food channel. anyhow take a look. its cheap but only 3 exist so don't waste time www.mdmradio.com. tnx and best of 73'ses to all mdm ted Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL Thanks to Ted for posting that he has three of these kits in stock. A caution to those that are buying this kit... they are the option kits for the Motrac/Motran/Mocom-70 vintage tabletop base stations. To be used on just a Mitrek you will need to mentally swap all the receiver metering point #1 and receiver metering point #2 instructions. Or make it easy on yourself and swap pins 1 and 2 on the receiver plug (easy way is to unsolder the two wires on the switch end and swap there), or you can add a DPDT toggle switch connected to reverse the two pins. The new switch should be labeled Mitrek and Pre-Mitrek (or Motrac/Motran/Mocom-70). The manual for the Mitrek version of these kits is at http://www.repeater-builder.com/mitrek/mitrek-consolette-metering-kit-hln4138a.pdf. Note that they contain a 17.5k precision resistor (Moto part number 6-855337). If you are building your own and the meter you are using has a different internal resistance you will have to tweak the value. Mike WA6ILQ
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
omtif you have never paid via paypal before. you go to the paypal.com site and where is says send money follow the directions. its really pretty simple...once you've done it you'll be an expert. mdm Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
Ted I hope you see my payment it has been sent. Ralph - Original Message - From: Ted Bleiman K9MDM - MDM Radiomailto:[EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.commailto:Repeater-Builder@yahoogroups.com Sent: Wednesday, March 05, 2008 4:11 PM Subject: Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY omtif you have never paid via paypal before. you go to the paypal.com site and where is says send money follow the directions. its really pretty simple...once you've done it you'll be an expert. mdm Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.comhttp://www.mdmradio.com/ - email - [EMAIL PROTECTED]mailto:mdmradio%40yahoo.com DIRECT ALL EMAIL __ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hshttp://www.yahoo.com/r/hs
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
roger wilcox...all went perfectly many thanks for your quick response. posted the package about 30 mins ago. priority mail should get it in 2 days. tnx mdm ted oh yeah i did have the extra parts the resistor and knob and the bracket for the meter. a bonus i didn't realize i had them. --- Ralph Messer [EMAIL PROTECTED] wrote: Ted I hope you see my payment it has been sent. Ralph - Original Message - From: Ted Bleiman K9MDM - MDM Radiomailto:[EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.commailto:Repeater-Builder@yahoogroups.com Sent: Wednesday, March 05, 2008 4:11 PM Subject: Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY omtif you have never paid via paypal before. you go to the paypal.com site and where is says send money follow the directions. its really pretty simple...once you've done it you'll be an expert. mdm Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.comhttp://www.mdmradio.com/ - email - [EMAIL PROTECTED]mailto:mdmradio%40yahoo.com DIRECT ALL EMAIL __ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hshttp://www.yahoo.com/r/hs Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs
Re: [Repeater-Builder] Mitrek tune up
Well, I've never tried tuning one with a manual, but the official Motorola diddle stick seems to work just fine. Sorry; couldn't let that one pass. Seriously though, any analog VOM with a 50 microamp movement will work just fine. In this regard, the Motorola Test Set is just a 50 uA meter and a rotary switch. No magic here. Eric, KH6CQ --- [EMAIL PROTECTED] wrote: Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
Re: [Repeater-Builder] Mitrek tune up
This might help... http://www.repeater-builder.com/motorola/test-sets/test-set-index.html Mike WA6ILQ At 12:30 AM 03/04/08, you wrote: Well, I've never tried tuning one with a manual, but the official Motorola diddle stick seems to work just fine. Sorry; couldn't let that one pass. Seriously though, any analog VOM with a 50 microamp movement will work just fine. In this regard, the Motorola Test Set is just a 50 uA meter and a rotary switch. No magic here. Eric, KH6CQ --- [EMAIL PROTECTED] wrote: Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ Yahoo! Groups Links
Re: [Repeater-Builder] Mitrek tune up
This might help... http://www.repeater-builder.com/motorola/test-sets/test-set-index.html Mike WA6ILQ At 12:30 AM 03/04/08, you wrote: Well, I've never tried tuning one with a manual, but the official Motorola diddle stick seems to work just fine. Sorry; couldn't let that one pass. Seriously though, any analog VOM with a 50 microamp movement will work just fine. In this regard, the Motorola Test Set is just a 50 uA meter and a rotary switch. No magic here. Eric, KH6CQ --- [EMAIL PROTECTED] wrote: Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ Yahoo! Groups Links
Re: [Repeater-Builder] Mitrek tune up
Collins, The Mot test set is basically a meter with a switch and of course the properly wired cable to plug directly into the rig. The test set also switches in the correct resistor combinations to get proper movement. Also the manual follows and instructs based on the test set. When tuning some instructions say tune for a dip. Often these dips are slight, barely seen. After practice the tech gets use to this, but you should note this. Some see a small dip and ignor it, but it is what is tuned for. Also typical digital meters reaction is slow. I find an old meter with analog meter best if don't have test set. What band and freq is your Mitrek on??? 73, ron, n9ee/r From: [EMAIL PROTECTED] Date: 2008/03/03 Mon PM 06:30:44 CST To: Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] Subject: [Repeater-Builder] Mitrek tune up Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
Re: [Repeater-Builder] Mitrek tune up
Thanks Mike, Once again repeater builders come through. Collin -Original Message- From: Mike Morris WA6ILQ [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tue, 4 Mar 2008 4:05 am Subject: Re: [Repeater-Builder] Mitrek tune up This might help... http://www.repeater-builder.com/motorola/test-sets/test-set-index.html Mike WA6ILQ At 12:30 AM 03/04/08, you wrote: Well, I've never tried tuning one with a manual, but the official Motorola diddle stick seems to work just fine. Sorry; couldn't let that one pass. Seriously though, any analog VOM with a 50 microamp movement will work just fine. In this regard, the Motorola Test Set is just a 50 uA meter and a rotary switch. No magic here. Eric, KH6CQ --- [EMAIL PROTECTED] wrote: Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin __ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ Yahoo! Groups Links
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
Hello Ted I see your Mitrek metering kit and will take one. I will pay via Paypal if you will tell me how. Thanks . Tom Manning, AF4UG 4349 Barclay Pl PaCE, fL 32571-2203 - Original Message - From: Ted Bleiman K9MDM - MDM Radio To: repeater-builder@yahoogroups.com Sent: Tuesday, March 04, 2008 12:30 PM Subject: [Repeater-Builder] MITREK TUNE UP ACCESSORY GENTLEMEN; take a look at www.mdmradio.com I just placed there a kit for metering Mitrek as well as several other Motorola radios. the TLN4420 metering kit was originally for the consolette base station Mocom 70 super station etc. It would make a nice project to build your self a test set for the Mocom 70- motrac-mitrek etc cheap and almost all the work has been done. a drill a soldering iron with the hot end marked in RED,a few tools a little technical know how and i sound like Alton Brown of Food channel. anyhow take a look. its cheap but only 3 exist so don't waste time www.mdmradio.com. tnx and best of 73'ses to all mdm ted Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL __ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
RE: [Repeater-Builder] Mitrek tune up
The schematic for the Mitrek Test Meter is here: www.repeater-builder.com/motorola/test-sets/hln4138a-mitrek-consolette-mete ring-kit.pdf or if you don't like long URLs, you can go here: http://tinyurl.com/ywc9bm A large meter with a 50uA movement works well, but make sure you include the current-limiting resistor! 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Eric Grabowski Sent: Tuesday, March 04, 2008 12:31 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek tune up Well, I've never tried tuning one with a manual, but the official Motorola diddle stick seems to work just fine. Sorry; couldn't let that one pass. Seriously though, any analog VOM with a 50 microamp movement will work just fine. In this regard, the Motorola Test Set is just a 50 uA meter and a rotary switch. No magic here. Eric, KH6CQ --- [EMAIL PROTECTED] mailto:n4tua%40aol.com wrote: Dear Friends, Has anyone tuned a Mitrek receiver using the manual? I was wondering if this can be done using a standard uA meter? I have come to the measurements at point 6 and cannot get a reading. Maybe doing something wrong. I have overall netted a great increase in sensitivity from what I had before. This is a high split receiver so I am tuning right down to the bottom on the presets. Any help? Do I need to get the Motorola test set? Is it just a meter and some switches? Thanks, Collin
Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY
Ted, I will take one of the kits also. Please save me one if you would. I will include the payment in with the coax purchase. Thanks, Collin -Original Message- From: Tom Manning [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tue, 4 Mar 2008 8:31 pm Subject: Re: [Repeater-Builder] MITREK TUNE UP ACCESSORY Hello Ted I see your Mitrek metering kit and will take one. I will pay via Paypal if you will tell me how. Thanks . Tom Manning, AF4UG 4349 Barclay Pl PaCE, fL 32571-2203 - Original Message - From: Ted Bleiman K9MDM - MDM Radio To: repeater-builder@yahoogroups.com Sent: Tuesday, March 04, 2008 12:30 PM Subject: [Repeater-Builder] MITREK TUNE UP ACCESSORY GENTLEMEN; take a look at www.mdmradio.com I just placed there a kit for metering Mitrek as well as several other Motorola radios. the TLN4420 metering kit was originally for the consolette base station Mocom 70 super station etc. It would make a nice project to build your self a test set for the Mocom 70- motrac-mitrek etc cheap and almost all the work has been done. a drill a soldering iron with the hot end marked in RED,a few tools a little technical know how and i sound like Alton Brown of Food channel. anyhow take a look. its cheap but only 3 exist so don't waste time www.mdmradio.com. tnx and best of 73'ses to all mdm ted Ted Bleiman K9MDM MDM Radio If its in stock...we've got it! P O Box 31353 Chicago, IL 60631-0353 773.631.5130 fax 773.775.8096 web http://www.mdmradio.com - email - [EMAIL PROTECTED] DIRECT ALL EMAIL __ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
Re: [Repeater-Builder] Mitrek repeater
Hello Collin, I would concur with your choice of the Mitrek. They are inexpensive, easy to find, and work well in rpt. use. You have several choices of channel elements for different fx. stability, and the rec. has a plug in preamp (optional). I have built several rpts., using SEPARATE radios (they are cheap), using just the rec. in one box, and the xmitter in the other.I wired a ZETRON controller to each Box. I used WACOM duplexers. I would mention, there are several different power levels of transmitter sections, and of course you always want to run them slightly under the max output, WITH GOOD COOLING, If duty cycle is high! I have a repeater on VHF that has been in service for eighteen (18) years. It is a Motorola MSR 2000. You guessed it!! It is basically a Mitrek chassis, with a 110 watt PA. Other than a yearly check up, it has never let me down. There are many rigs out there that would Fit the Bill for rpt. use, but having used the MITREK for rpt., remote bases, packet. I tend to lean towards the MITREK.If you want to Get your feet wet, this would be the chassis for you.(Easy to work on too!!) Regards, Tim Hardy [W7TRH / AFA5TP / TIMSKAKU Vashon Is. Wa. -- Original message -- From: [EMAIL PROTECTED] Hi, I am building a 2 meter repeater. I was leaning towards Mitrek radios. Any ideas or warnings? Pitfalls to avoid? I am looking at doing the building and modifications myself and saving some $. Your help or suggestions will help me. Thanks, Collin More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com ---BeginMessage--- Hi, I am building a 2 meter repeater. I was leaning towards Mitrek radios. Any ideas or warnings? Pitfalls to avoid? I am looking at doing the building and modifications myself and saving some $. Your help or suggestions will help me. Thanks, Collin __ More new features than ever. Check out the new AOL Mail ! - http://webmail.aol.com ---End Message---
Re: [Repeater-Builder] Mitrek Reedless PL Board
- Original Message - From: Eric Grabowski To: Repeater-Builder@yahoogroups.com Sent: Sunday, December 30, 2007 10:10 PM Subject: [Repeater-Builder] Mitrek Reedless PL Board Does anyone know for certain whether the Mitrek HLN4181A reedless PL board can be used for encode and decode simultaneously? Eric, KH6CQ __ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
Re: [Repeater-Builder] Mitrek Transmitter Tuning
Almost all Motorola radios use a 50 micro-amp DC meter. Sometimes the negative end goes to ground, sometimes the positive end. The metering test set will have a meter reversal switch on it to flip the leads. You can use almost any 50uA meter. Most of the time you're just peaking various stages, however when measuring the PA current, the meter is often connected across a low-value resistor, so neither end is grounded. Schematics for some popular Motorola test sets are also on repeater-builder, in the Motorola area, Test Set section. Depending on the model, the appropriate metering socket pins are selected and fed to the meter. Someone else will have to comment on operating the unit out-of-band. Bob M. == --- Richard Bessey [EMAIL PROTECTED] wrote: Repeater-Builder Guru's, I am trying to tune up the transmitter on one of my Mitrek's and am having no luck and alot of frusteration. I have the motorola manual and the cheat sheets here: http://www.repeater-builder.com/mitrek/pix/mitrek-tx-tuning.gif The question is, what do I need to measure when they say, Meter position 3 (Which I understand is pin 3 on the test socket) but what do I need to measure with my multi-meter? Milli-volts? Milli-amps? Micro-amps? Do I simply put my negative terminal for my multi-meter to ground, and the other test lead to the appropriate pin? Or does my negative terminal need to be in one of the test sockets? Also, I have Mitrek Model HUE1159BPR radio, which is for 470-512. I am trying to run it on 462/467, is that too far out of range for this radio? Any word of advice would be greatly appreciated. Regards, Richard Bessey KE7IOD Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping
Re: [Repeater-Builder] Mitrek Transmitter Tuning
At 05:10 PM 12/27/07, you wrote: Repeater-Builder Guru's, I am trying to tune up the transmitter on one of my Mitrek's and am having no luck and alot of frusteration. And I guarantee you will ruin the PA deck (all it takes is one click) unless you read the caution in my interfacing article about C800L and how to tune it. I have the motorola manual and the cheat sheets here: http://www.repeater-builder.com/mitrek/pix/mitrek-tx-tuning.gif The question is, what do I need to measure when they say, Meter position 3 (Which I understand is pin 3 on the test socket) On the lower numbered positions, yes, but not always. Some times it is a sequence of 21345 rather then 12345. The higher numbered ones get strange, and on the transmitter they float both ends to measure PA deck current. It can be a real pain to try and hold both probes in socket pins and tune an adjustment, and then swing a locknut on the peak. 90% of the time the adjustment creeps just a hair as the locknut binds. but what do I need to measure with my multi-meter? Milli-volts? Milli-amps? Micro-amps? 50 ua full scale. And don't even think of trying to use a DVM to tune a radio. You really need a needle type meter to see the peaks and dips. Do I simply put my negative terminal for my multi-meter to ground, and the other test lead to the appropriate pin? Or does my negative terminal need to be in one of the test sockets? Look in the Test Set article on Repeater-builder (click on Motorola then test sets). You will find schematics of the test set and the cables. If you are going to do more than one radio then buy a greyface or silverface test set on ebay, you will thank yourself, especially when you are trying to hold two probes, a screwdriver and an open-end wrench. A friend one took a photo of me with a screwdriver in one hand, a wrench in the other, a test probe in my teeth, while keeping my eyes on a VOM, and his parrot on my shoulder looking down on it all. Not to be blunt - but if you can't afford a old Moto Test Set and a Motrac/Motran/Mocom/Mitrek cable, at least buy an old Simpson 260 or a Tripplet 630 and build a box with a test plug (you can gut a sealed relay that has the right plug) and a rotary switch to drive the meter. I went the cheap way in my early days and bought old 50ua meters for $5 to $10ea and burned up two of them by going across the wrong points on the test jacks. Also, I have Mitrek Model HUE1159BPR radio, which is for 470-512. I am trying to run it on 462/467, is that too far out of range for this radio? Only had three high range radios and used em all for parts or trading stock, so can't help you much. But figuring that a 450 radio will have acceptable receive performance down to at least 438.5, occasionally to 435, you should be OK. Transmitters stretch farther than receivers. Any word of advice would be greatly appreciated. See above. Let us know how it works out. Regards, Richard Bessey KE7IOD Mike WA6ILQ
Re: [Repeater-Builder] Mitrek Transmitter Tuning
I have a meter that I removed from a Mitrek based paging transmitter that I used to tune Mitrek mobiles when I built repeaters out of them. It has the plugs on the ends of the wires for the receiver and transmitter as well as the function and meter reverse switch on it would sell it if anyone interested email me off of the list. I am good in QRZ. WB5OXQ
Re: Re: [Repeater-Builder] Mitrek/Micor Station test.
I have the Mot test set with both Micor and Mitrek cables. I bought at hamfest for $40. I would suggest this approach. Also E-bay, the 24/7 hamfest is a good start. 73, ron, n9ee/r From: Mike Morris WA6ILQ [EMAIL PROTECTED] Date: 2007/10/21 Sun PM 08:44:02 CDT To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek/Micor Station test. There are some part numbers on the Test Set page atwww.repeater-builder.com But you will probably find it easier and cheaper to buy a Micor stationtest set (the one made to mount inside a Micor station cabinet) and rewire it todo Micors and Mitreks. The male connector that is used on Motrac / Motran / Mocom / Mitrek test cables is based on a mil-spec hermetically sealed relay base with one pin cut off (i.e. the Motrac design team used an existing relay socket as a metering cable socket and had the manufacturer fill in one pin). I built my first cable by purchasing a surplus relay with theproper base, then cutting off one pin, then using a pipe cutter on the top ofthe can, gutting the case, soldering the conductors from a piece of the bulk test set cable to the connector pins, and then filling the housing with a 50% / 50% mix of RTV and hot melt glue. It lasted for years until Ifound a real cable, and I passed my home-made one on to a friend,still working fine. For what it's worth, the real connector is a 01-80754A26 assembly of the base, housing, and cable clamp, and will run you just under $20 Mike WA6ILQ At 01:24 PM 10/21/07, you wrote: Hi all Looking to procure the 12 pin male connector used for the meter socketfor Mitreks My test box (Moto R1033A) uses an assembly labeled RTK 4042APR whichconsists of a 37pin connector, cable and 12 pin male connector. Nopart # is listed for the 12 Pin Male. All I need is the 12Pin mitrek connector but beggars etc. Also could use the 5 Pin male connector used for Micors. I need to make a test box for my son N7XVF in Montana. Ralph W7HSG Yahoo! Groups Links From:[EMAIL PROTECTED][EMAIL PROTECTED] To:Repeater-Builder@yahoogroups.com Subject:Re: [Repeater-Builder] Micor StationExciter Date:Sun, 21 Oct 2007 06:24:59 + Content-Type: Multipart/mixed; boundary=NextPart_Webmail_9m3u9jl4l_19238_1192998248_1 You're trying to move a 406-420 range station up into the 440-MHzrange - quite a jump and often a challenge to move without seriousmodifications. You really want to find a 450-470 MHz range unit, to movedown to the 440-450 range - it should tune right up. Save the 406-420 MHz station for a 420-430 MHz linking transceiver, ortrade it to someone for a 450-470 range unit, since they are nearlyalways available. The 406-420 ones are hard to find when you need one fora link... -Original Message- From: georgiaskywarn Sent: Oct 20, 2007 8:16 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor Station Exciter Hi Folks, Have a problem with a Micor Station tonight. Have a Micor that was on 409.600T / 407.275R . It was working great on those freq.s before pulling the elements and sending them off to ICS. New elements (old ones were stolen in route!) with 444.600T / 449.600R in and ready to go. Receiver tuned fine. (slugs out awful far) Transmitter is a little harder. I have gotten all the way down to the exciter output. (step 11 and 12) No go. Not sure if it is just too far down or what. The board is TLD5491A3. Is there any changes or mods need to be done to make it happen on 444.600mhz?Thanks, Robert ps Will be using a RC210 on this...any suggestions there would be appreciated :-) Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
RE: [Repeater-Builder] Mitrek/Micor Station test.
Also could use the 5 Pin male connector used for Micors. You mean 7 pin? The easiest place to find those is in a SpectraTAC receiver chassis - there is a little jumper with one of those connectors on each end that connects the receiver to the interconnect board for use with the metering module. If you don't have the metering module, this jumper is superflous. --- Jeff
RE: [Repeater-Builder] Mitrek/Micor Station test.
Ralph, You're in luck! Motorola Parts still has that unique 12-pin male plug in stock, for about $17. Not only was that plug used for MSY and Mitrek test cables, but it also is used for a whole slew of program/test cables for handhelds, such as the SP-50, HT1000, Saber, and others. Since some of those cables are still available for purchase, so is the connector. Ask for Motorola Part 0180754A26. I doubt that these plugs will be available much longer. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Sunday, October 21, 2007 1:24 PM To: Repeater-Builder@yahoogroups.com; Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek/Micor Station test. Hi all Looking to procure the 12 pin male connector used for the meter socket for Mitreks My test box (Moto R1033A) uses an assembly labeled RTK 4042APR which consists of a 37pin connector, cable and 12 pin male connector. No part # is listed for the 12 Pin Male. All I need is the 12 Pin mitrek connector but beggars etc. Also could use the 5 Pin male connector used for Micors. I need to make a test box for my son N7XVF in Montana. Ralph W7HSG
Re: [Repeater-Builder] Mitrek/Micor Station test.
There are some part numbers on the Test Set page at www.repeater-builder.com But you will probably find it easier and cheaper to buy a Micor station test set (the one made to mount inside a Micor station cabinet) and rewire it to do Micors and Mitreks. The male connector that is used on Motrac / Motran / Mocom / Mitrek test cables is based on a mil-spec hermetically sealed relay base with one pin cut off (i.e. the Motrac design team used an existing relay socket as a metering cable socket and had the manufacturer fill in one pin). I built my first cable by purchasing a surplus relay with the proper base, then cutting off one pin, then using a pipe cutter on the top of the can, gutting the case, soldering the conductors from a piece of the bulk test set cable to the connector pins, and then filling the housing with a 50% / 50% mix of RTV and hot melt glue. It lasted for years until I found a real cable, and I passed my home-made one on to a friend, still working fine. For what it's worth, the real connector is a 01-80754A26 assembly of the base, housing, and cable clamp, and will run you just under $20 Mike WA6ILQ At 01:24 PM 10/21/07, you wrote: Hi all Looking to procure the 12 pin male connector used for the meter socket for Mitreks My test box (Moto R1033A) uses an assembly labeled RTK 4042APR which consists of a 37pin connector, cable and 12 pin male connector. No part # is listed for the 12 Pin Male. All I need is the 12 Pin mitrek connector but beggars etc. Also could use the 5 Pin male connector used for Micors. I need to make a test box for my son N7XVF in Montana. Ralph W7HSG Yahoo! Groups Links From:[EMAIL PROTECTED] [EMAIL PROTECTED] To:Repeater-Builder@yahoogroups.com Subject:Re: [Repeater-Builder] Micor Station Exciter Date:Sun, 21 Oct 2007 06:24:59 + Content-Type: Multipart/mixed; boundary=NextPart_Webmail_9m3u9jl4l_19238_1192998248_1 You're trying to move a 406-420 range station up into the 440-MHz range - quite a jump and often a challenge to move without serious modifications. You really want to find a 450-470 MHz range unit, to move down to the 440-450 range - it should tune right up. Save the 406-420 MHz station for a 420-430 MHz linking transceiver, or trade it to someone for a 450-470 range unit, since they are nearly always available. The 406-420 ones are hard to find when you need one for a link... -Original Message- From: georgiaskywarn Sent: Oct 20, 2007 8:16 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Micor Station Exciter Hi Folks, Have a problem with a Micor Station tonight. Have a Micor that was on 409.600T / 407.275R . It was working great on those freq.s before pulling the elements and sending them off to ICS. New elements (old ones were stolen in route!) with 444.600T / 449.600R in and ready to go. Receiver tuned fine. (slugs out awful far) Transmitter is a little harder. I have gotten all the way down to the exciter output. (step 11 and 12) No go. Not sure if it is just too far down or what. The board is TLD5491A3. Is there any changes or mods need to be done to make it happen on 444.600mhz? Thanks, Robert ps Will be using a RC210 on this...any suggestions there would be appreciated :-)
RE: [Repeater-Builder] Mitrek COS ?
Shane, In my case, I had to supply a COS indication to be able to move to the next stage... then the inbound signal is evaluated for the presence of the CTCSS tone Once both conditions are met,my controller will key the transmitter. I don't know for sure how the linker-II operates, but... I have a RC-210 on a Micorand it will not key the transmitter unless it gets a COS signal. COS is step 1... adding the requirement of TOS (CTCSS) is step 2. Most controllersset for tone squelch operation (at least all I have ever had dealings with)will require both conditions to be met before it will key the transmitter... I also run a tone on my 6m repeater. I was having trouble with my micor in that the COS signal would never go completely to zero volts... this would have kept the transmitter keyed all the time if I didn't require the tone. Like you, I do not plan to disable the tone.. ever. Asthe signaling logic for both the TOS and COS are positive in my application, I just tied both COS and TOSdetect (from the controller)to the TOS indicator on the radio. Now whenthe receiversees a tone on the inbound signal, both get the proper logic signal needed to key the repeater. The repeater works fine, but I am unable to drop the tone requirement on the input.I haven't had a chance to deal with the "floating COS voltage" as of yet... but I plan to correct the condition when I get a chance. I would reccomend connecting the controller according to the manufacturers instructions but this approach should work for you.. 73 Mike Perryman www.k5jmp.us -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of Shane AutreySent: Thursday, May 18, 2006 11:06 PMTo: Repeater-Builder@yahoogroups.comSubject: [Repeater-Builder] Mitrek COS ?I have recently purchased an ICS LinkerIIa controller. Super nice guy onthe phone with prompt shipping.. I have a question for the group..Where I live we have a lot of problems when we do not use PL/CTCSS onrepeaters for various reasons. So my question is this... I am using aconverted Mitrek plus 50W mobile (of course PA is turned down)with the HLN4181 tone board.I understand all of the connections etc (thanks repeater-builder.com!)to the outside of the radio. I do not intend to run the repeater atany time in COS mode. It will be in PL mode at all times. If I do thiswill I still have to hook up the COS to the repeater controller ornot? I assume that I can just use the CTCSS input on pin 9 of P1(Port1) on the controller for full control and not hook up pin 8 (COSinput). Is this correct or am I totally looking over something? Againlet me state again the repeater will be in PL decode mode at alltimes.. I do not intend to remove the PL at any time..Thanks ahead of timeShane KI4M Ring'em or ping'em. Make PC-to-phone calls as low as 1¢/min with Yahoo! Messenger with Voice. YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Mitrek COS ?
Hi Richard and Neil... In my instance, it floats between 3 and 3.5 volts which is just enough to confuse my controller as to which state the squelch is actually in. Both approaches would probably work just fine... but haven't had a chance to deal with it yet. I can think of a number of instances whenone might want to disable the input tone.I haven't had a need to so far, so the issue hasn't been resolved as of yet. During the summer is when most station owners want to do maintenance on AM-Directional systems, so my days have been pretty full of late. grin! Thanks for the ideas thoughI will check into it once I get a chance 73 Mike Perryman www.k5jmp.us -Original Message-From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of [EMAIL PROTECTED]Sent: Friday, May 19, 2006 11:22 AMTo: Repeater-Builder@yahoogroups.comSubject: Re: [Repeater-Builder] Mitrek COS ? Mike Perryman wrote: I was having trouble with my micor in that the COS signal would never go completely to zero volts... Mocom-70 was good for that too .. my solution came from a fire-alarm controller: Details are fuzzy, but ~ it used some dual-input flip-flop comparator chip (7476 ?) ... sample (waffle-voltage) on one input a reference on the other. When the relative voltages reversed, made for a nice clean on-off at the output, and a xstr follower allowed for switching some juice... /. Hmmm ... I have run into this problem in the past ... I fixed it by biasing the emitter of the first (external) transistor off ground with a voltage divider .. or sometimes by placing a diode in series with the emitter. One time - I think it was a Standard land-mobile radio, the COS feed (aka squelch detector) was several volts above ground. In that instance, I installed a voltage divider between A+ and ground - to positive bias the added transistor above ground so when the squelch opened, the sense lead to the external transistor turned it on. Make sense? Neil YAHOO! GROUPS LINKS Visit your group "Repeater-Builder" on the web. To unsubscribe from this group, send an email to:[EMAIL PROTECTED] Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
RE: [Repeater-Builder] Mitrek COS ?
Ok, enjoy, Neil Original Message From: [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Mitrek COS ? Date: Fri, 19 May 2006 12:13:02 -0400 Hi Richard and Neil... In my instance, it floats between 3 and 3.5 volts which is just enough to confuse my controller as to which state the squelch is actually in. Both approaches would probably work just fine... but haven't had a chance to deal with it yet. I can think of a number of instances when one might want to disable the input tone. I haven't had a need to so far, so the issue hasn't been resolved as of yet. During the summer is when most station owners want to do maintenance on AM-Directional systems, so my days have been pretty full of late. grin! Thanks for the ideas though I will check into it once I get a chance 73 Mike Perryman www.k5jmp.us -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Friday, May 19, 2006 11:22 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek COS ? Mike Perryman wrote: I was having trouble with my micor in that the COS signal would never go completely to zero volts... Mocom-70 was good for that too .. my solution came from a fire-alarm controller: Details are fuzzy, but ~ it used some dual-input flip-flop comparator chip (7476 ?) ... sample (waffle-voltage) on one input a reference on the other. When the relative voltages reversed, made for a nice clean on-off at the output, and a xstr follower allowed for switching some juice... /. Hmmm ... I have run into this problem in the past ... I fixed it by biasing the emitter of the first (external) transistor off ground with a voltage divider .. or sometimes by placing a diode in series with the emitter. One time - I think it was a Standard land-mobile radio, the COS feed (aka squelch detector) was several volts above ground. In that instance, I installed a voltage divider between A+ and ground - to positive bias the added transistor above ground so when the squelch opened, the sense lead to the external transistor turned it on. Make sense? Neil - --- -- YAHOO! GROUPS LINKS a.. Visit your group Repeater-Builder on the web. b.. To unsubscribe from this group, send an email to: [EMAIL PROTECTED] c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. - --- -- 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/
Re: [Repeater-Builder] Mitrek COS ?
Shane, I would always hook up the COS as well as the CTCSS decode for one reason. The controller will cut off the audio to the repeater transmitter as soon as the COS signal goes away. The CTCSS decode will always hang a few hundred milliseconds and cause a long squelch break on the repeater output when a user unkeys unless the COS is used to shut off the audio before the CTCSS decode goes away. Also - for maintenance using a signal generator without the CTCSS encode capability, I would like to have the capability to turn off the CTCSS capability. You might also find in some emergency situation that you wanted to turn off the CTCSS requirement to allow all users to operate whether they knew the CTCSS code or not. Just a thought - 73 - Jim 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/
RE: [Repeater-Builder] Mitrek Channel Elements Wanted
I'm looking for some high stability Mitrek channel elements to use in several link and repeater transmitters we have. The part number is KXN- 1095. I can use about 15 of these channel elements. The standard elements we are currently using are not very stable and allow the transmitter to drift +/- 5 kHz as the transmitter heats up. Any help in locating these would be much appreciated. Feel free to contact me off-list. Thanks. Rich, N6CIZ Did you install the crystals in your existing channel elements yourself, or did you send them to the crystal manufacturer to have them compensated? If you did it yourself, and you plan to do the same with the high-stab elements, the results you get will likely be no better than what you're experiencing now. Unless the element is compensated to the specific crystal that is installed, all bets are off. --- Jeff -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.6/338 - Release Date: 5/12/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.392 / Virus Database: 268.5.6/338 - Release Date: 5/12/2006 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/
RE: [Repeater-Builder] Mitrek Channel Elements Wanted
Rich, I wonder if someone simply re-crystaled your channel elements, and did not have them compensated to match the crystals. A properly compensated channel element will normally drift no more than a few hundred Hertz after it has been in service for a while. Try sending one set of channel elements to ICM for re-crystaling and full compensation, before assuming that you have bad channel elements. Sometimes, just changing the crystal will work- but it is always a gamble that the compensation already in the channel element will not be a lot different from what the new crystal requires. It's not worth taking the chance, IMO. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Richard Sauer Sent: Friday, May 12, 2006 2:11 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek Channel Elements Wanted I'm looking for some high stability Mitrek channel elements to use in several link and repeater transmitters we have. The part number is KXN- 1095. I can use about 15 of these channel elements. The standard elements we are currently using are not very stable and allow the transmitter to drift +/- 5 kHz as the transmitter heats up. Any help in locating these would be much appreciated. Feel free to contact me off-list. Thanks. Rich, N6CIZ Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Model Number
At 05:28 PM 05/08/06, you wrote: Can anyone tell me what this Mitrek Radio band split is XT34JJA3900DK HUE 1072CPR Randy Go to www.repeater-builder.com, then click on Motorola, then Mitrek, then scroll down to Mitrek Model and Chassis Numbers. Mike WA6ILQ 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/
RE: [Repeater-Builder] Mitrek Model Number
Randy, I believe you have a 30 watt radio intended for the 450-470 MHz band. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Randy Sent: Monday, May 08, 2006 5:29 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek Model Number Can anyone tell me what this Mitrek Radio band split is XT34JJA3900DK HUE 1072CPR Randy Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek 70CM problem
Scott wrote: Well, here is the setup, and the problem: Setup: Moto Mitek trunk mobile on 70CM with CAT 250 controller, and control head intact (mic disconnected). TX-RX duplexers (GE flavor, 3 cavity) retuned. Uses stock tone board for incoming tone, Com-Spec board for outgoing. Running about 25W into duplexer. Problem: Worked OK for a month in the shop on a small antenna, about a day at the site, then now the RX audio is not there unless you are at the site. Also you get a wierd growling like feedback and cycling of the TX for a minute. Since you said it worked okay at the shop, I'll assume that the duplexer isn't insufficient for your needs. I'd suspect interconnecting coax (from the duplexer to the radio set) or the antenna and feedline you switched it to. Put the repeater (duplexer output) on a dummy load and see if the weirdness goes away. If it does, suspect the antenna and/or feedline you moved the repeater onto. Kevin 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/
RE: [Repeater-Builder] Mitrek 70CM problem
Scott, When you say 3 cavity do you mean three total, or three on each side? If the former, I suspect that the duplexer has insufficient isolation and/or your transmitter has some spurious output. Take a spectrum analyzer to the site and monitor the off-air signal with a short whip to check the purity of your transmitted signal. Your comment about things being different when you're at the site brings to mind an interesting case from the past: I remember one site that had several repeaters, and *some* of their owners complained that the systems worked fine normally, but went bonkers while a technician was at the site. But, get this: The remaining owners complained that their systems were bonkers normally, but worked fine when a technician was at the site! After a great deal of head-scratching, it suddenly dawned on us that the only thing that changed when a technician was at the site was that the interior lights were always turned on, since there were no windows in the radio building. The one switch for the interior lights also turned on some big outside floodlights, in case the visit was at night. The problem turned out to be a bad neutral connection at the last pole before the drop to the radio shack. The poor neutral connection allowed the center tap of the 120/240 VAC circuit to shift toward the side with the heavy load of the lights, and we measured about 102 volts on one side and about 135 volts on the other. When the lights were off the shift went the other way. Occasionally, the splice would weld itself and the problem would go away for weeks at a time, only to reappear during a windy day. This is a very common problem for utility linemen, because aluminum wire is often used for long overhead lines, but copper is used for the house drop. A special bi-metal splice should be used at the junction, but sometimes that gets missed during emergency restoration work. Just to be certain that power is not an issue, use a good DVM to measure the voltage at your repeater. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Scott Sent: Wednesday, December 28, 2005 7:14 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Mitrek 70CM problem Well, here is the setup, and the problem: Setup: Moto Mitek trunk mobile on 70CM with CAT 250 controller, and control head intact (mic disconnected). TX-RX duplexers (GE flavor, 3 cavity) retuned. Uses stock tone board for incoming tone, Com-Spec board for outgoing. Running about 25W into duplexer. Problem: Worked OK for a month in the shop on a small antenna, about a day at the site, then now the RX audio is not there unless you are at the site. Also you get a wierd growling like feedback and cycling of the TX for a minute. Suggestions: ?? Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Interface (PTT Lockup)
At 04:14 PM 7/2/05, you wrote: I am attempting to interface an IRLP board (as a repeater controller) to my duplexed UHF Mitrek. The old controller was a Scom 5k... After making all the connections, I have now noticed that the PTT stays locked up. I read the doc on repeater builder about interfacing a Mitrek and I made the changes it suggested (tieing pin 12 to pin 4 and The 12-to-4 jumper sets it up for active low PTT. pin 13 to pin 16) and it has not improved anything... Pin 13 to ground causes PTT. Pin 16 to ground switches the RX into PL mode. The IRLP board uses PTT active low From the website: This pin should be connected to the radio PTT. This lead is active LOW only (goes to ground for radio to transmit). Any ideas? See above. Thanks! Jim 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/
RE: [Repeater-Builder] Mitrek Interface (PTT Lockup)
Maybe I am a little confused (which is easy, since I have been working out in a steamy garage all day!)... I have done the 12-to-4 jump and nothing, PTT was still locked up. I even did the Pin 1 to Pin 25 on the bottom of the radio and ptt is still locked up.. If this helps, as soon as I unplug the radio from the irlp interface, PTT goes out.. When I plug my Mic out cable into my MIC jack on my sound card, I get nothing but squelch... Does that help any? Thanks. Jim -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:Repeater- [EMAIL PROTECTED] On Behalf Of Mike Morris WA6ILQ Sent: Saturday, July 02, 2005 6:28 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek Interface (PTT Lockup) At 04:14 PM 7/2/05, you wrote: I am attempting to interface an IRLP board (as a repeater controller) to my duplexed UHF Mitrek. The old controller was a Scom 5k... After making all the connections, I have now noticed that the PTT stays locked up. I read the doc on repeater builder about interfacing a Mitrek and I made the changes it suggested (tieing pin 12 to pin 4 and The 12-to-4 jumper sets it up for active low PTT. pin 13 to pin 16) and it has not improved anything... Pin 13 to ground causes PTT. Pin 16 to ground switches the RX into PL mode. The IRLP board uses PTT active low From the website: This pin should be connected to the radio PTT. This lead is active LOW only (goes to ground for radio to transmit). Any ideas? See above. Thanks! Jim Yahoo! Groups Links 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/
RE: [Repeater-Builder] Mitrek Interface (PTT Lockup)
At 06:40 PM 7/2/05, you wrote: Maybe I am a little confused (which is easy, since I have been working out in a steamy garage all day!)... I have done the 12-to-4 jump and nothing, PTT was still locked up. I even did the Pin 1 to Pin 25 on the bottom of the radio and ptt is still locked up.. 1-25 on the bottom and 12-4 on the control connector are the same thing. If this helps, as soon as I unplug the radio from the irlp interface, PTT goes out.. When I plug my Mic out cable into my MIC jack on my sound card, I get nothing but squelch... Does that help any? Remove the 1-25 jumper. Are you using a control head? Unhook the IRLP board completely. Let both pin 13 and 16 float in the breeze separately. Completely unconnected. As I said earlier, pin 13 is PTT and pin 16 switches the receiver between carrier and PL mode. It has nothing to do with the transmitter. The two should never be tied together (unless both happen to be grounded at the same time). Power up everything and the radio should be in receive. If not, find that problem. Ground only pin 13. It should go into transmit. Ungrounded, it should go to receive. If not, then there is another problem. Once you have it that far, then write back. If you feel this is more appropriate to handle off list, that's fine. Mike WA6ILQ 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/
RE: [Repeater-Builder] Mitrek Interface (PTT Lockup)
At 06:40 PM 7/2/2005 -0700, you wrote: If this helps, as soon as I unplug the radio from the irlp interface, PTT goes out.. When I plug my Mic out cable into my MIC jack on my sound card, I get nothing but squelch... ---Obvious question is. what is the voltage on the PTT line when you connect it to the IRLP board? How about continuity to ground on the IRLP's PTT line when NOT connected to the Mitrek. Maybe the switching transistor on the IRLP board is bad? Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html We offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
Re: [Repeater-Builder] Mitrek drawers...
Don't bother, they are 806 to 866, they won't do 927. Lance N2HBA - Original Message - From: Mark Tomany To: Repeater-Builder Sent: Wednesday, June 15, 2005 8:30 PM Subject: [Repeater-Builder] Mitrek drawers... Im still working on improving my repeaters RX coverage, specifically handheld coverage To do this, Im considering remote RX sites, RF-linked to the main repeater (voted). So .. I have two Mitrek drawer units in my shack T45JJA6900. In attempting to decode these, I think Ive found (on the RBTIP site) that they are 800 - 900 MHz band radios. (I guess I could pull the cover off and look at the elements to see what freq theyre on, eh?? Hehehe.) I do not have control cabling/heads for these (yet) so, Im wondering if they were/are capable to stretching up to 927MHz. Id want to put one on TX there and the other on RX (Link radios ) First things first, Id need to determine whether they even work, but I want to know their capabilities before I delve into trying to resurrect them into service Thanks. Mark N9WYS 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 the Yahoo! Terms of Service.
RE: [Repeater-Builder] Mitrek drawers...
Thats what I needed to know Looks like the GTX mobile will be the choice, then Thanks. Mark N9WYS -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED]On Behalf Of Captainlance Sent: Wednesday, June 15, 2005 9:46 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek drawers... Don't bother, they are 806 to 866, they won't do 927. Lance N2HBA - Original Message - From: Mark Tomany To: Repeater-Builder Sent: Wednesday, June 15, 2005 8:30 PM Subject: [Repeater-Builder] Mitrek drawers... Im still working on improving my repeaters RX coverage, specifically handheld coverage To do this, Im considering remote RX sites, RF-linked to the main repeater (voted). So.. I have two Mitrek drawer units in my shack T45JJA6900. In attempting to decode these, I think Ive found (on the RBTIP site) that they are 800 - 900 MHz band radios. (I guess I could pull the cover off and look at the elements to see what freq theyre on, eh?? Hehehe.) I do not have control cabling/heads for these (yet) so, Im wondering if they were/are capable to stretching up to 927MHz. Id want to put one on TX there and the other on RX (Link radios) First things first, Id need to determine whether they even work, but I want to know their capabilities before I delve into trying to resurrect them into service Thanks. Mark N9WYS 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] mitrek repeater
At 11:03 AM 6/12/05, you wrote: this subject may have been touched on before, but I could not find it. What I am wanting to do is to build a mobile cross band repeater. I have 2 mitrek pa decks: 1 t53jja1900ak chassis HUD1012A, and 1 t43jja1900ak chassis HUD1002A. I am wondering if there is a way to change the decks, 1 on the tx side and 1 on the rx side to uhf 440. is it just the matter of changing channel elements to uhf or do I have to change alot of the internal workings of the rigs. Also, a copy of a service manual possibly in .pdf would greatly be helpful have been all over the internet to no avail. Any ideas or help would greatly appreciated on this. Thanks The receiver and exciter of the Mitrek are all one board. The PA deck deck is made up of ceramic substrates that are bolted into the heat sink. What you want to do is simply not cost effective or practical. If you want to take two radios and make up a split site high band repeater with a UHF cross-link then you need to find one each UHF and high band GE Mastr II and simply swap the receivers, then bring the RX antenna connector out to the front panel. The mod is so easy you would think the radios were designed for that. Look at the procedures for duplexing the Mastr-II on repeater-builder.com - it's all there. You will end up with a 2m RX in the same housing as the UHF TX, and a 440 RX in the same housing as the 2M TX. Put the control stuff at the 2M RX end and treat the 2M RX/440 TX as if they were a single site 2M repeater. BTW you will be a lot happier if the UHF radio you pick for this is a 406-420MHz model and you get a 420.5 to 421 MHz (or so) crosslink frequency, use low power, and beam antennas. If the distance is short (less than 5 miles) you will probably be able to disconnect the PA deck completely and feed the 420 exciter to the beam antenna. Mike WA6ILQ 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/
Re: [Repeater-Builder] Mitrek PL Deck
Have tried with the dual reed board, it can't, if you need different tone for Rx/Tx with the 4181 is easy to do Juan - Original Message - From: Ken Arck To: Repeater-Builder@yahoogroups.com Sent: Friday, June 03, 2005 5:32 PM Subject: [Repeater-Builder] Mitrek PL Deck We're talking an HLN-4020A, dual reed type. Either I missed it or it can't be done but is there any way to fullduplex the thing? The reedless 4181 deck does it but not the dual reed one?Ken 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek PL Deck
At 05:47 PM 6/3/2005 -0700, you wrote: Have tried with the dual reed board, it can't, ---Thanks, I was afraid of that. No biggie, this is just a backup radio I was getting ready anyway... Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html It was great to meet many of you at Dayton 2005! We offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
Re: [Repeater-Builder] Mitrek PL (HLN4181 board)
Mike Morris WA6ILQ wrote: ... snip ... PS - Note to John: do you think that Silke would do a writeup on the RCA-700 interfacing? Exactly what are you referring to? I have a couple of the Silke RCA-700's here. Neil 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/
Re: [Repeater-Builder] Mitrek PL (HLN4181 board)
I don't know, you would have to ask him. -- Original Message -- Received: Sun, 22 May 2005 06:57:42 AM CDT Mike Morris WA6ILQ wrote: PS - Note to John: do you think that Silke would do a writeup on the RCA-700 interfacing? 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/
Re: [Repeater-Builder] Mitrek PL (HLN4181 board)
At 02:33 PM 5/21/05, JOHN MACKEY K0SSF [EMAIL PROTECTED] wrote: OK Mike (WA6ILQ), I am reading on the repeater builder web site about the Mitrek PL (HLN4181) board. I have a 10 Meter FM remote base connected to my repeater via an RLC-3 controller. I CURRENTLY use the HLN4020 dual element PL board in my 10FM remote base am strongly considering swapping it for the reedless HLN4181 board due to the ease of changing PL. I know I could simply put a Comm-Spec board in, but using the HLN4181 saves money (since have one currently collecting dust) and it would give me reverse burst no metter what tone I am using. (Rev burst is nice because I occasionally access another remote base across the countty during band openings, and our two remotes using the same PL with rev burst is really nice!!) I could simply set the reedless board up with a couple of different tone options switch resistor networks on the fly. You will need a 2-pole relay to do that - switch the two strobe pulses. On the web site regarding the HLN4181 reedless board you state: There is also an audio notch filter on the board to remove the received PL tone from the received audio. However it's a pretty poor design and you don't want to try to use it in repeater service - just plan on using an external high-pass filter between the receiver and your repeater controller So, Mike, what exactly is the proble with the Mitrek high-pass filter? It's a shunt gyrator design tuned to roughly 134hz. Picture a series LC network tuned to 134hz and shunted across the RX audio. Is is any worse that the other moto PL board high pass filters? Much worse. The Mitrek is a low-Q notch, the Micor and Motrac at least had real inductors in a true high pass / low cut filter. Go yourself a favor - grab a Micor RX PL board or a GE M2 repeat audio card (from a station shelf) and copy the highpass audio filter. I know I could simply pick the audio off the discriminator BEFORE the PL filter, but I don't do that. I always use a PL filter BEFORE the audio goes into my controller so the PL tone does not get repeated I with others would do that. cause other problems. BTW look at http://www.repeater-builder.com/mitrek/mitrek-interfacing.html#Audio_Out for more tricks on Mitrek repeat audio (the link is into the middle of a writeup on the Mitrek). Mike WA6ILQ PS - Note to John: do you think that Silke would do a writeup on the RCA-700 interfacing? 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/
Re: [Repeater-Builder] Mitrek ID needed
At 01:35 PM 3/9/05, you wrote: From a friend. Please respond to Doug offlist with the addy supplied at end. Thanks. Hello, I have a Mitrek, Model # J34JJA6100AK, Chassis # HUE1006A. While this seems to be a 30 watt UHF radio, the frequency range and the required channel elements are a bit of a mystery. My Motorola Mitrek book does not identify this item and my search on the WEB produced nothing different than the numbers I have in the Motorola Book. Then you didn't look in the right place... Go to www.repeater-builder.com, then to the Moto page, then to the Mitrek page then to the Model Number page. The HUE1006 is listed as a 450-470 30w chassis with the factory preamp. Any help would be appreciated!! Google is your friend Looking for Mitrek produces about 900 entries, and the third one is the Model Number page. Doug [EMAIL PROTECTED] 480-947-7318 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/
Re: [Repeater-Builder] Mitrek VHF wide band noise on TX
Sean, Most Class C VHF power amplifiers have DC voltage provided continuously, and the TX keying is performed earlier in the chain at the exciter or one of the drivers. What you describe is a very serious problem: self-oscillation that is generating spurious signals at full power. Since this oscillation is not what the PA was designed for, destruction of the PA can result. What event happened around the time this problem began? Were any changes made to the repeater? Could the tower have been struck by lightning? Has another station been placed into service nearby? If a high-power paging station is nearby, and your PA does not have an isolator/circulator on its output, your PA may be suffering from intermodulation. If no outside events coincide with the instant problem, then it is likely that a component within your exciter or one of the driver stages has failed. You might also look closely at the forward power control circuitry for proper operation. Does the problem occur when the TX is feeding a dummy load? 73, Eric Lemmon WB6FLY maxjam_99 wrote: I have a VHF Mitrek that has been split for repeater operation. It has worked flawlessly until now. When the TX is unkeyed the transmitter will stay keyed for approx 10 seconds. During this time it generates a wide signal +-1 MHz centered on the TX frequency with full power out. In 10 seconds or so it will unkey and cease tx'ing. If you key the TX during the time it is generating this wide signal then it will TX a proper clean signal, unkey, and start over. Any thoughts? Thanks... Sean / NØPBA Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek VHF wide band noise on TX
Since the PA in these radios is class C they are always active and they rely on the loss of input signal to drop the amplifier. Sounds like you may have some oscillations in your PA after the exiter drops generating the spurious output. I have seen this many times before. especially on the PA's that have the ceramic substrates instead of a PWB. They tend to crack causing grounding issues and impedance problems. Even the regular PWB type can do strange things, your problem can also stem from running the PA out of its design freq range. If you are, you might look into possible mods to bring it in range. The service manual details the parts list items that are different for the different splits. Usually the PWB is the same and various caps and inductors may be different. These types of problems can be hard to find because so many things can cause them, and they are usually intermittant in nature. Bad transistors, or bad decoupling caps on the power feeds to the transistors, etc. any of these It might be as simple as removing the board and cleaning and applying new heat sink grease and making sure the hardware is all snug. Another thing to check would be the SMT type caps that are sometimes tacked right on th transistor. those are prone to cracking and you usually cant see this until you heat one side of the cap with an iron. If it is broken it will easily fall apart, leaving its other half attached to the still soldered side. If you have an RF milivolt meter, sometimes you can use that to help isolate which transistor cicuit is causing the problems. Just be sure to hook the PA to a dummy load before you do any troubleshooting. Hope that helps, Wade - KR7K - Original Message - From: maxjam_99 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, January 16, 2005 8:00 AM Subject: [Repeater-Builder] Mitrek VHF wide band noise on TX I have a vhf mitrek that has been split for repeater operation. It has work flawlessly until now. When the TX is unkeyed the transmitter will stay keyed for approx 10 seconds. During this time it generates a wide signal +-1Mhz centered on the TX frequency with full power out. Once 10 seconds or so it will unkey and cease tx'ing. If you key the TX during the time it is generating this wide signal then it will TX a proper clean signal, unkey and start over. Any thoughts? Thanks... Sean / NØPBA Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek VHF wide band noise on TX
maxjam_99 wrote: I have a vhf mitrek that has been split for repeater operation. It has work flawlessly until now. When the TX is unkeyed the transmitter will stay keyed for approx 10 seconds. During this time it generates a wide signal +-1Mhz centered on the TX frequency with full power out. Once 10 seconds or so it will unkey and cease tx'ing. If you key the TX during the time it is generating this wide signal then it will TX a proper clean signal, unkey and start over. Any thoughts? If it is a ham repeater, take a heavy duty relay and place it in the B+ power line that feeds power to the PA. Use a sample of the PTT to key the relay (a buffer circuit may need constructed). Your PA is becoming unstable when there is no drive, and removing the B+ from it will eliminate that. If it is a commercial repeater, find out what is causing the unstableness and correct the problem. It could be that RF power from a nearby transmitter is getting back through the antenna connection; a circulator or isolator will fix that. Kevin Custer 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/
Re: [Repeater-Builder] Mitrek
What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 2:50 PM Subject: Re: [Repeater-Builder] Mitrek One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
I hope you need 5 crystals as they have an anti-ham $50 minimum order...I use West Crystal in Canada,take advantage of the currency exchange rate! Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew 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/
Re: [Repeater-Builder] Mitrek
Five xtals right now would not be a problem, but what about quality? But does not the cost of shipping make up the difference going to Cnanada? Everytime I get something shipped from there it cost me an arm and a leg. Mathew I hope you need 5 crystals as they have an anti-ham $50 minimum order...I use West Crystal in Canada,take advantage of the currency exchange rate! Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
Question ... Will Bomar do a temperature run on your crystal oscillator module - change the temperature compensation components to enable the crystal to stay on frequency from winter to summer temperatures? Will Bomar guarantee it too? I will let you answer these questions. Sure, you can get by on cheap - maybe. Have you ever made a trip to an icy mountain top in the dead of winter to put a cheap crystal back on frequency? I think not. Neil McKie - WA6KLA Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 2:50 PM Subject: Re: [Repeater-Builder] Mitrek One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/
Re: [Repeater-Builder] Mitrek
Well can't say that I have ever went to a Mountain top, no mountins in Indiana, (grin), but it's like the difference between AES and RandL buing a radio, nearly $100.00 to $200.00 difference on the price. One of the reason I ask what kind of quality they produce. Mathew Question ... Will Bomar do a temperature run on your crystal oscillator module - change the temperature compensation components to enable the crystal to stay on frequency from winter to summer temperatures? Will Bomar guarantee it too? I will let you answer these questions. Sure, you can get by on cheap - maybe. Have you ever made a trip to an icy mountain top in the dead of winter to put a cheap crystal back on frequency? I think not. Neil McKie - WA6KLA Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 2:50 PM Subject: Re: [Repeater-Builder] Mitrek One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
Have had good crystals from Bomar in the past and good crystals from West as well. I think they wound up to be about $14 shipped-check their webpage. Mathew Quaife wrote: Five xtals right now would not be a problem, but what about quality? But does not the cost of shipping make up the difference going to Cnanada? Everytime I get something shipped from there it cost me an arm and a leg. Mathew I hope you need 5 crystals as they have an anti-ham $50 minimum order...I use West Crystal in Canada,take advantage of the currency exchange rate! Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as 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/
Re: [Repeater-Builder] Mitrek
Well I can only relate my experience,worked for an RCC and used hundreds of their xtals and installed them in Icoms ourselves and had very few problems with temp comp.When we did,it was cured by replacing the Icom.The only company that truly does good element comp is ICM. Mathew Quaife wrote: Well can't say that I have ever went to a Mountain top, no mountins in Indiana, (grin), but it's like the difference between AES and RandL buing a radio, nearly $100.00 to $200.00 difference on the price. One of the reason I ask what kind of quality they produce. Mathew Question ... Will Bomar do a temperature run on your crystal oscillator module - change the temperature compensation components to enable the crystal to stay on frequency from winter to summer temperatures? Will Bomar guarantee it too? I will let you answer these questions. Sure, you can get by on cheap - maybe. Have you ever made a trip to an icy mountain top in the dead of winter to put a cheap crystal back on frequency? I think not. Neil McKie - WA6KLA Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 2:50 PM Subject: Re: [Repeater-Builder] Mitrek One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA 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/
Re: [Repeater-Builder] Mitrek
Hi Mike Thanks. Our frequencies are not same as US. We are confined to 434-438. So I cannot expect availability of crystals / channel elements in this range. Of course they may be useless in the US. The local manufacturer of crystals can supply me with whatever I need within 7 days and that too for a cost under $3 but I need to specify the parameters - that is less than what it will cost for mere postage from the US!!. I do not think any one in India has even seen a Mitrek. So it becomes important to be able to specify. Of course I can just blindly specify 3rd overtone crystal - series resonant and see what happens. Then I could alter parameters after I see what it does. Even if I have to waste a couple of crystals is no big deal compared to the hassle of ordering and getting the xtals from US. If I get hold of the manual including the schematics I can make a more intelligent guess looking on the channel element circuit diagram. There is a ham in Bangalore who used to work for Motorola and I hope he will be able to hunt out some information. I thought someone in the US has a clue!! Are there service manuals around - could one beg, borrow or steal one ? Thanks for your help. 73s Venkat VU2KV At 03:51 AM 19/12/2004, you wrote: I may be able to help, but it will take a day or two... While I make a couple of phone calls, Venkat what frequencies do you need? Maybe someone on this group has them in their box of elements left over from their amateur radio conversions. Of maybe someone has a leftover set of UHF commercial elements with good crystals that are near his frequency and can send them to Venkat. His supplier could take those crystals, plug them into a test circuit and determine the parameters by what loading is needed to pull the test crystals onto the indicated frequency. Mike WA6ILQ At 02:05 PM 12/18/04, you wrote: I glanced at the call and thought it was a Canadian one. Ooops. I forget that world wide web means just that. Too used to thinking there's just North Americans on the list for some foolish reason. Chuck WB2EDV - Original Message - From: Paul Kelley [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 4:58 PM Subject: Re: [Repeater-Builder] Mitrek Me too, but we live in the U.S.! I suspect living in India gives one a very different perspective on that. I hope someone can help Venkat with the xtal info. (Maybe someone already has... I was only partially following the topic since I don't have the requested info.) Paul N1BUG On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/ 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek
Neil McKie wrote: Question ... Will Bomar do a temperature run on your crystal oscillator module - change the temperature compensation components to enable the crystal to stay on frequency from winter to summer temperatures? Actually, yes they do. Will Bomar guarantee it too? Yes, they will. Repeater Builder has used Bomar for about 2 years now almost exclusively. They have provided very good service for us, at a price more reasonable compared to ICM. http://www.bomarcrystal.com/communication.htm Kevin Custer 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/
Re: [Repeater-Builder] Mitrek
Q wrote: The only company that truly does good element comp is ICM. Not True. Bomar does TC on user supplied ICOMs and Channel Elements. They charge $15 extra for this service over and above the price of the crystal. http://www.bomarcrystal.com/communication.htm Kevin Custer 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/
Re: [Repeater-Builder] Mitrek
Thanks,I didnt know that. Back in the days I used to order from them,they didnt! That $50 minimum rubs me the wrong way so I dont do any business with them. So ICM and Bomar are the only ones that do a true temp comp??? Seasons Greetings,73,Lee Kevin Custer wrote: Q wrote: The only company that truly does good element comp is ICM. Not True. Bomar does TC on user supplied ICOMs and Channel Elements. They charge $15 extra for this service over and above the price of the crystal. http://www.bomarcrystal.com/communication.htm Kevin Custer 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/
Re: [Repeater-Builder] Mitrek
Q wrote: Thanks,I didnt know that. Back in the days I used to order from them,they didnt! That $50 minimum rubs me the wrong way so I dont do any business with them. So ICM and Bomar are the only ones that do a true temp comp??? Seasons Greetings,73,Lee I'm going to let a cat out of the bag, BUT, I don't want it to screw me. Scott and I buy crystals all the time from Bomar. Many times our order doesn't come up to the $50 minimum, but they allow us to place the order anyway; likely because we buy a good deal of crystals over a years time. I think if you plead with them, they'll 'give in' on the minimum, but, ymmv. Bomar, ICM, and one other company (that slips me right now) are the only three that I know of that actually TC's elements and ICOM's. I'll dig in the archives to see if I can come up with the other company Seasons Greeting to your and yours as well Lee. Kevin 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/
Re: [Repeater-Builder] Mitrek
Mathew Quaife wrote: Well can't say that I have ever went to a Mountain top, no mountins in Indiana, (grin), True, I've been there once. Here, western US, we have mountains. I live in central Oregon - elevation here is about 3500' AMSL. I also live on a hill - the local repeater sites (2) are within 150 yards of my back door. (I own one of them.) but it's like the difference between AES and RandL buing a radio, nearly $100.00 to $200.00 difference on the price. One of the reason I ask what kind of quality they produce. I don't know who RandL is (never heard of them) but I do and have bought from AES in the past. One time a couple of years ago, I visited the local HRO store in the greater Portland Oregon area ... asked about a replacement microphone for my Kenwood TM741 ... 1, they didn't seem to have a clue where it could be found/did they have one ... 2, they didn't know what Kenwood microphone could be substituted from which model radio. While the HRO people were trying to figure out what to do next, I 'borrowed' a current QST Magazine from the pile on the counter top, looked up the AES 800 number. When the HRO people told me they couldn't help me, I went out to me truck, grabbed my cell phone and called AES' Squeak at the Las Vegas store and ordered the mic I needed. Over the years, I have discovered that are ham equipment stores that sell stuph ... then there is one store that can supply when the other(s) don't seem to have a clue. Similarly, in my opinion, there is one crystal manufacturer that I have totally relied on in excess of 35 years - International Crystal - and I have heard of others still in some sort of small rock business. Hope this helps ... my earlier comments below still apply. Neil McKie - WA6KLA Mathew Question ... Will Bomar do a temperature run on your crystal oscillator module - change the temperature compensation components to enable the crystal to stay on frequency from winter to summer temperatures? Will Bomar guarantee it too? I will let you answer these questions. Sure, you can get by on cheap - maybe. Have you ever made a trip to an icy mountain top in the dead of winter to put a cheap crystal back on frequency? I think not. Neil McKie - WA6KLA Mathew Quaife wrote: What about Bomar Crystals? They will manufacture crysals for $10.00 as to where everyone else charges from $15.00 to $20.00. Has anyone used them before and how are there xtals. Mathew - Original Message - From: Neil McKie [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 2:50 PM Subject: Re: [Repeater-Builder] Mitrek One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
If you are getting crystals made in 7 days they are going to be green and they will move all over the place until they finish growing and then they stabilize themselves. They will also move off- frequency with temperature changes. Butch From: K. Venkataramanan [EMAIL PROTECTED] Reply-To: Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Mitrek Date: Sun, 19 Dec 2004 16:58:46 +0530 Hi Mike Thanks. Our frequencies are not same as US. We are confined to 434-438. So I cannot expect availability of crystals / channel elements in this range. Of course they may be useless in the US. The local manufacturer of crystals can supply me with whatever I need within 7 days and that too for a cost under $3 but I need to specify the parameters - that is less than what it will cost for mere postage from the US!!. I do not think any one in India has even seen a Mitrek. So it becomes important to be able to specify. Of course I can just blindly specify 3rd overtone crystal - series resonant and see what happens. Then I could alter parameters after I see what it does. Even if I have to waste a couple of crystals is no big deal compared to the hassle of ordering and getting the xtals from US. If I get hold of the manual including the schematics I can make a more intelligent guess looking on the channel element circuit diagram. There is a ham in Bangalore who used to work for Motorola and I hope he will be able to hunt out some information. I thought someone in the US has a clue!! Are there service manuals around - could one beg, borrow or steal one ? Thanks for your help. 73s Venkat VU2KV At 03:51 AM 19/12/2004, you wrote: I may be able to help, but it will take a day or two... While I make a couple of phone calls, Venkat what frequencies do you need? Maybe someone on this group has them in their box of elements left over from their amateur radio conversions. Of maybe someone has a leftover set of UHF commercial elements with good crystals that are near his frequency and can send them to Venkat. His supplier could take those crystals, plug them into a test circuit and determine the parameters by what loading is needed to pull the test crystals onto the indicated frequency. Mike WA6ILQ At 02:05 PM 12/18/04, you wrote: I glanced at the call and thought it was a Canadian one. Ooops. I forget that world wide web means just that. Too used to thinking there's just North Americans on the list for some foolish reason. Chuck WB2EDV - Original Message - From: Paul Kelley [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 4:58 PM Subject: Re: [Repeater-Builder] Mitrek Me too, but we live in the U.S.! I suspect living in India gives one a very different perspective on that. I hope someone can help Venkat with the xtal info. (Maybe someone already has... I was only partially following the topic since I don't have the requested info.) Paul N1BUG On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
Venkat; i think i have a copy of mitrek maual that is excess to our needs. $15 + postage as i recall it is in very good condx. also have mitrek tx channel elements not many rx i will look on monday and email you. i assume you need uhf manual. tnx Ted Bleiman k9mdm mdm radio ltd Ted Bleiman K9MDM MDM Radio Ltd - 1629-B N. 31 st Ave Melrose Park, IL 60160 708.681.0300 fax 708.681.9800 web http://www.mdmradio.com - Check it now!! Do you Yahoo!? Meet the all-new My Yahoo! Try it today! 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek
You gonna grind your own crystals??? You dont really need all that info if youre ordering replacements,just supply the radio info to the crystal house.They may need the numbers of the channel elements on some radios. You should still get a manual thought,you will need it for the tuning instructions,ectSeasons Greetins,Lee,N3APP krmvsjr wrote: Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/
Re: [Repeater-Builder] Mitrek
On Dec 18, 2004, at 9:07, Q wrote: You gonna grind your own crystals??? You dont really need all that info if youre ordering replacements,just supply the radio info to the crystal house. Try http://www.westcrystal.com/ Call them, give them the part number of the channel element, the operating frequency and a credit card number. Obscenely inexpensive (Crystals for my 2ppm MASTR2 ICOMs were about US$15 each shipped). -Dave K9DC 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/
Re: [Repeater-Builder] Mitrek
Did you see where he/she is Juan - Original Message - From: Q To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:07 AM Subject: Re: [Repeater-Builder] Mitrek You gonna grind your own crystals??? You dont really need all that info if youre ordering replacements,just supply the radio info to the crystal house.They may need the numbers of the channel elements on some radios. You should still get a manual thought,you will need it for the tuning instructions,ect Seasons Greetins,Lee,N3APPkrmvsjr wrote:Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity -(freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/ 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek
With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/
Re: [Repeater-Builder] Mitrek
Me too, but we live in the U.S.! I suspect living in India gives one a very different perspective on that. I hope someone can help Venkat with the xtal info. (Maybe someone already has... I was only partially following the topic since I don't have the requested info.) Paul N1BUG On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/
Re: [Repeater-Builder] Mitrek
I glanced at the call and thought it was a Canadian one. Ooops. I forget that world wide web means just that. Too used to thinking there's just North Americans on the list for some foolish reason. Chuck WB2EDV - Original Message - From: Paul Kelley [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 4:58 PM Subject: Re: [Repeater-Builder] Mitrek Me too, but we live in the U.S.! I suspect living in India gives one a very different perspective on that. I hope someone can help Venkat with the xtal info. (Maybe someone already has... I was only partially following the topic since I don't have the requested info.) Paul N1BUG On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek
I may be able to help, but it will take a day or two... While I make a couple of phone calls, Venkat what frequencies do you need? Maybe someone on this group has them in their box of elements left over from their amateur radio conversions. Of maybe someone has a leftover set of UHF commercial elements with good crystals that are near his frequency and can send them to Venkat. His supplier could take those crystals, plug them into a test circuit and determine the parameters by what loading is needed to pull the test crystals onto the indicated frequency. Mike WA6ILQ At 02:05 PM 12/18/04, you wrote: I glanced at the call and thought it was a Canadian one. Ooops. I forget that world wide web means just that. Too used to thinking there's just North Americans on the list for some foolish reason. Chuck WB2EDV - Original Message - From: Paul Kelley [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 4:58 PM Subject: Re: [Repeater-Builder] Mitrek Me too, but we live in the U.S.! I suspect living in India gives one a very different perspective on that. I hope someone can help Venkat with the xtal info. (Maybe someone already has... I was only partially following the topic since I don't have the requested info.) Paul N1BUG On Saturday 18 December 2004 04:42 pm, Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV 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/
Re: [Repeater-Builder] Mitrek
One of the reasons I always go to International Crystal Manufacturing Co, Inc. in Oklahoma City, Oklahoma. http://www.icmfg.com 800-HAM-XTAL (800-426-9825) Hope this helps, Neil - WA6KLA Chuck Kelsey wrote: With all due respect, if the crystal manufacturer cannot make a crystal for a Mitrek with just the channel element part number, I'd seriously be looking for a different supplier. Chuck WB2EDV - Original Message - From: krmvsjr [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Saturday, December 18, 2004 6:01 AM Subject: [Repeater-Builder] Mitrek Can anyone tell me details of crystal specifications for UHF mitrek. I am getting a T44JJA390DK and would like to replace the crystals for local frequencies. I would like to get confirmation that the crystals are 3rd overtone crystals - series resonant - 32pf capacity - (freq =10.7 / 9 for RX) I do not know the freq multiplication for TX crystal. There is a local crystal manufacturer who can supply xrystals if the operating parameters are specified. Can anywho has a the service manual make me a copy ? Venkat VU2KV Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek test set cable
At 12:02 PM 10/21/2004 -0700, you wrote: I 'think' it should be the same as your Micor test cable. Two different style connectors, Neal. The Micor (of course) is a square, 7 pin one. The Mitrek is a round, 11 pin one Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html We now offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
Re: [Repeater-Builder] Mitrek test set cable
In a message dated 10/21/2004 2:07:09 PM Central Standard Time, [EMAIL PROTECTED] writes: I 'think' it should be the same as your Micor test cable. Neil Nope! The mitrek, motracand motran are had round "test ports" not the 7 pin micor plug. Thanks! Brian, wd9hsy 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek test set cable
Should have added that the orginal cable came with the right angle plug and a 11 pin plug on the other end, which then plugs into the cable required for the mitrek. coverts the 11 pin plug to the round metering plug for the mitrek Ray - Original Message - From: TGundo 2003 To: Repeater-Builder@yahoogroups.com Sent: Thursday, October 21, 2004 1:25 PM Subject: Re: [Repeater-Builder] Mitrek test set cable I have the micor one with the test set already, which is retangular. The mitrek does indeed need the round plug, which is the one I need. Thanks! Tom, W9SRV[EMAIL PROTECTED] wrote: In a message dated 10/21/2004 2:07:09 PM Central Standard Time, [EMAIL PROTECTED] writes: I 'think' it should be the same as your Micor test cable. Neil Nope! The mitrek, motracand motran are had round "test ports" not the 7 pin micor plug. Thanks! Brian, wd9hsy Do you Yahoo!?Express yourself with Y! Messenger! Free. Download now. 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek test set cable
Good point, had forgotten about that - thanks Ken, Neil BTW, will you be at Rickreall? Ken Arck wrote: At 12:02 PM 10/21/2004 -0700, you wrote: I 'think' it should be the same as your Micor test cable. Two different style connectors, Neal. The Micor (of course) is a square, 7 pin one. The Mitrek is a round, 11 pin one Ken --- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html We now offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
Re: [Repeater-Builder] Mitrek test set cable
At 11:12 AM 10/21/04, you wrote: I am in need of the right adapter cable to go from the test set to a mitrek mobile. Test set is model S1056C. If anyone has one they are willing to part with or knows where I can get one that would be very helpful! Feel free to E-mail me direct at [EMAIL PROTECTED] Thanks! Best to watch ebay for a cable that you can modify. A while back I ordered out the connector body, shell and hold-down clamp (all the pieces for the end that plugs into the front of the test set) and it totaled about $60 Best you get a cable - any cable - and take whatever end is on it and replace it with a DB-25 or DB-37 (I forget how many pins the original Moto connector has), then make up your own cables that have the appropriate DB on them (i.e. use the moto cable as nothing more than an adapter cable). There were some industrial relays that had the same plug on them as Moto used in the Motrac / Mocom / Mitrek test connectors. You might be able to find one and gut it for the base. Mike WA6ILQ 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/
Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..?
Especially when desktop repeaters are 20-40w, and most of them are made from mobile radios Check out the Kenwood page at www.repeater-builder.com There's a reason that repeaters were made in a non-desktop configuration: good performance with high power comes in a physical package that doesn't fit on a desktop !!! If he'd started with a low power radio and backed it off to half power he'd be a lot happier. There was a guy selling full duplex 100w Mitreks set up as repeaters on ebay a while ago. I giggled when I saw them there. Mike WA6ILQ At 03:22 PM 9/24/04, you wrote: And remember it came with a RX preamp!!!; why he want to trade this Full Duplex radio for a desktop repeater Juan - Original Message - From: Tedd Doda To: Repeater-Builder@yahoogroups.com Sent: Friday, September 24, 2004 3:07 PM Subject: Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..? On Fri, 24 Sep 2004 21:19:44 -, skipp025 wrote: I'm willing to guess the 110 watt mitrek will not operate well full duplex at the full rated power I doubt it would run for very long at all at full rated output, being a mobile chassis (if it has the cable and control head). I had a 60 watt UHF mobile Mitrek and had a hard time running 40 watts with the stock heatsink (yes, having a couple fans on it) as a repeater. You have a good point though Skipp. Maybe that's why I was blowing up front end (mixer) FET's every couple months in the Mitrek :) Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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/ 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 the Yahoo! Terms of Service. 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..?
At 09:19 PM 9/24/2004 -, you wrote: Wonder if he or any of you have ever measured the in cabinet desense. I'm willing to guess the 110 watt mitrek will not operate well full duplex at the full rated power without some receiver grief. ---Running a 110 watt Mitrek @ 110 watts in continuous duty, the least of your problems is desense :-) Ken -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html We now offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..?
On Fri, 24 Sep 2004 21:19:44 -, skipp025 wrote: I'm willing to guess the 110 watt mitrek will not operate well full duplex at the full rated power I doubt it would run for very long at all at full rated output, being a mobile chassis (if it has the cable and control head). I had a 60 watt UHF mobile Mitrek and had a hard time running 40 watts with the stock heatsink (yes, having a couple fans on it) as a repeater. You have a good point though Skipp. Maybe that's why I was blowing up front end (mixer) FET's every couple months in the Mitrek :) Tedd Doda, VE3TJD Lazer Audio and Electronics Baden, Ontario, Canada 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/
Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..?
And remember it came with a RX preamp!!!; why he want to trade this "Full Duplex radio" for a desktop repeater Juan - Original Message - From: Tedd Doda To: Repeater-Builder@yahoogroups.com Sent: Friday, September 24, 2004 3:07 PM Subject: Re: [Repeater-Builder] Mitrek Full Duplex 110 watt..? On Fri, 24 Sep 2004 21:19:44 -, skipp025 wrote:I'm willing to guess the 110 watt mitrek will not operate well full duplex at the full rated powerI doubt it would run for very long at all atfull rated output, being a mobile chassis (ifit has the cable and control head).I had a 60 watt UHF mobile Mitrek and had ahard time running 40 watts with the stock heatsink (yes, having a couple fans on it) asa repeater.You have a good point though Skipp. Maybe that'swhy I was blowing up front end (mixer) FET's every couplemonths in the Mitrek :)Tedd Doda, VE3TJDLazer Audio and ElectronicsBaden, Ontario, CanadaYahoo! 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/ 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 the Yahoo! Terms of Service.
Re: [Repeater-Builder] Mitrek Question Controler
I have used LINK controler RLC-4 on commercial repeaters. They're verry easy to setup and operate. Ed --. . -- . Bob wrote: I have a Motorola Mitrek Mobile that conv to a full duplex repeater,I need information as to what a good controler and the one that easy to wire up for a newbeePlease Reply to [EMAIL PROTECTED] Bob/N2BR Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Still Popular as a Repeater Project Radio?
I am using a Mitrek as a 6m repeater (actually two separate for TX and RX) and it is working great. My next project is a 2M repeater from Mitreks.. Plan on finding Mitreks for around $10-$30 depending on model and channel elements being with it or not. John Clark - KI4AWK Thomasville, GA [EMAIL PROTECTED] - Original Message - From: skipp025 [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, May 04, 2004 5:54 PM Subject: [Repeater-Builder] Mitrek Still Popular as a Repeater Project Radio? Was at a Private Company Sale today... looking at about 200 plus Motorola Mitreks ready for auction. Are they still popular with you folks for repeater projects? I'm trying to estimate demand and an offer each radio price. A mixed bag of UHF VHF units with mixed power levels. After this, I'll ask you the same questions about the 200 plus remote head Spectras in the next shelf down. Your turn... skipp Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Rocks
The Mitrek channel elements are gone. Thanks, everybody! Jeff At 06:10 PM 3/23/2004, you wrote: I have some Mitrek channel elements for 442.05 T / 447.05 R that are excess to my needs. Before they go on Ebay, does anybody want them? I'd take $15 for them, or trade for IC-7800. Jeff Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Rocks
Yep. I will send something to the list. You were #4. I see #5 in my inbox, too. Thanks for askin'. Jeff At 08:27 PM 3/23/2004, you wrote: Jeff, has the elements been spoken for? Larry KB8VUM Jeff Otterson wrote: I have some Mitrek channel elements for 442.05 T / 447.05 R that are excess to my needs. Before they go on Ebay, does anybody want them? I'd take $15 for them, or trade for IC-7800. Jeff Yahoo! Groups Links Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek Rocks
jeff, I'm interested in the rocks... thanks, Andy - Original Message - From: Jeff Otterson [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Tuesday, March 23, 2004 6:10 PM Subject: [Repeater-Builder] Mitrek Rocks I have some Mitrek channel elements for 442.05 T / 447.05 R that are excess to my needs. Before they go on Ebay, does anybody want them? I'd take $15 for them, or trade for IC-7800. Jeff Yahoo! Groups Links 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/
Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com
I guess that the Repeater Builder list was so overwhelmed with Mitrek stuff that it was inevitable that another list would be needed. I'm thinking of starting a list for users of 1/4 wave stainless steel 440 whip antennas. Should I narrow it down to the black anodized/painted ones? Chuck WB2EDV - Original Message - Subject: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com http://groups.msn.com/MitrekRepeaterBuilders is the link to this new group. The group has just started, so there are no postings yet. Please visit and start posting. Thanks 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/
Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com
Hey Chuck, have they started a j-pole antenna group yet? That would be a fascinating one to watch, if you include 432 I will join. Chuck Kelsey wrote: I guess that the Repeater Builder list was so overwhelmed with Mitrek stuff that it was inevitable that another list would be needed. I'm thinking of starting a list for users of 1/4 wave stainless steel 440 whip antennas. Should I narrow it down to the black anodized/painted ones? Chuck WB2EDV - Original Message - Subject: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com http://groups.msn.com/MitrekRepeaterBuilders is the link to this new group. The group has just started, so there are no postings yet. Please visit and start posting. Thanks Yahoo! Groups Links -- 73...Clark Beckman N8PZD Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, ß227, Any and all nonsolicited commercial E-mail sent to this address is subject to a download and archival fee of $500.00 U.S.. E-mailing denotes acceptance of these terms. 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/
Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com
It starts to get a bit old. And, yes, I suppose my comments are slightly out of line here. Does someone have the right to start a new list even though there are several existing ones that will easily serve the purpose? Certainly. Can someone put up another repeater when there are already 10 existing ones that serve the same geographic area? Sure. Do either serve any useful purpose? Not in my book. I think is does just the reverse -- it diminishes the usefulness of the existing resources and fractures an already small base of users. I've already said too much. I apologize to anyone offended by my off-topic post. And to those whom agree, just sit back and grin. I will shut up and suggest that we drop the subject. 73, Chuck WB2EDV - Original Message - From: Al Allum [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Sunday, February 08, 2004 12:27 PM Subject: Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com Boy Chuck, you're sarcastic! Unfortunately, you said what I was thinking. Al, N8ARO 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/
Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com
At 03:05 PM 2/8/04 +, tennesseestargazer wrote: http://groups.msn.com/MitrekRepeaterBuilders is the link to this new group. The group has just started, so there are no postings yet. Please visit and start posting. Thanks Joe KG4UJC Why bother? Is there too much traffic on the existing groups? The more groups that are out there the fewer knowledgeable folk that will be on each group. There are three major repeater groups now, will starting another have a positive effect? By the way, there is already a Mitrek group on Yahoo which has over 220 members, has been around since August of 2001, and has less than maybe 30 messages a month. And 90% of the repeater problems are not radio-specific. They are intermod, antenna problems, controller problems, or duplexer problems, and why limit yourself to answers only from those that are subscribed to your mitrek-specific group? You'd be much better served by joining one of the existing groups - if you post anbout a problem with your system you just might get an answer from someone that has a GE M2 system. I suggest that you check out these: Repeater-Builder@yahoogroups.com [EMAIL PROTECTED] Or is it that you have a problem with the politics of an existing group and just want to run your own group, complete with all the headaches involved? Mike 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/
Re: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com
Boy Chuck, you're sarcastic! Unfortunately, you said what I was thinking. Al, N8ARO I guess that the Repeater Builder list was so overwhelmed with Mitrek stuff that it was inevitable that another list would be needed. I'm thinking of starting a list for users of 1/4 wave stainless steel 440 whip antennas. Should I narrow it down to the black anodized/painted ones? Chuck WB2EDV Subject: [Repeater-Builder] Mitrek repeater builders group starting on groups.msn.com 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/
