[Repeater-Builder] Motorola Maxar mods for 6M?
I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated Tnx Dennis, K7FL Battle Ground, WA
RE: [Repeater-Builder] Motorola Maxar mods for 6M?
Dennis, You may have to mess with the front end filter assy but should be able to tune up there as long as the radio is a high split radio model. Mike _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dennis Ashworth Sent: Wednesday, January 28, 2009 9:48 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Maxar mods for 6M? I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated Tnx Dennis, K7FL Battle Ground, WA
Re: [Repeater-Builder] Kenwood TKR-850 question
Thanks to all that replied. Yes it does need to be a modified file by Kenwood and sent to me. This is a great group. Really appreciate your help! Best Regards, Alan - Original Message - From: NORM KNAPP To: Repeater-Builder@yahoogroups.com Sent: Wednesday, January 28, 2009 9:28 PM Subject: Re: [Repeater-Builder] Kenwood TKR-850 question The squelch tail problem with motorola portables on the tk-850 repeaters. Something to do with the reverse burst timing or something. We sold three new '850's to a customer and suddenly all the motorola portables started having a squelch tail at the end of their transmits. - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Wed Jan 28 19:55:02 2009 Subject: RE: [Repeater-Builder] Kenwood TKR-850 question What did they fix? Just curious. Nate -Original Message- From: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com ] On Behalf Of NORM KNAPP Sent: Wednesday, January 28, 2009 5:26 PM To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Subject: Re: [Repeater-Builder] Kenwood TKR-850 question Yes. Kenwood has a firmware fix for this. No big deal at all.
[Repeater-Builder] Micor Repeater
Hi All. I am working on several Micor repeaters for use in Montana linking back to Tucson via the inter-net. These are standard 75 watt complete Micor stations. My problem is with the built in circulator that is feed by the PA prior to the duplexer. I have tuned the circulator using both a signal generator and spectrum Analyzer and used the tracking generator method. I can not get the loss down below 1 db. Is this normal? Other single stage circulators I have used in the past have had less the 1/2 db loss. Any Ideas. I suspect the harmonic filter is the problem but have not tried to take on apart to see. Ralph, W7HSG
Re: [Repeater-Builder] Micor Repeater
If it were me, I'd suspect the LPF. Sweep it. Chuck WB2EDV - Original Message - From: Ralph S. Turk To: Repeater-Builder Cc: David Turk Sent: Thursday, January 29, 2009 11:36 AM Subject: [Repeater-Builder] Micor Repeater Hi All. I am working on several Micor repeaters for use in Montana linking back to Tucson via the inter-net. These are standard 75 watt complete Micor stations. My problem is with the built in circulator that is feed by the PA prior to the duplexer. I have tuned the circulator using both a signal generator and spectrum Analyzer and used the tracking generator method. I can not get the loss down below 1 db. Is this normal? Other single stage circulators I have used in the past have had less the 1/2 db loss. Any Ideas. I suspect the harmonic filter is the problem but have not tried to take on apart to see. Ralph, W7HSG
RE: [Repeater-Builder] Re: 2 meter noise help!
After all that have you sent the FCC a complaint about him ? They should step in and help you. --- On Wed, 1/28/09, Mike Besemer (WM4B) mwbese...@cox.net wrote: From: Mike Besemer (WM4B) mwbese...@cox.net Subject: RE: [Repeater-Builder] Re: 2 meter noise help! To: Repeater-Builder@yahoogroups.com Date: Wednesday, January 28, 2009, 10:18 PM H… got one of those on our systems too. We even told him to stay off… sent him certified mail, email, and have recordings of control ops telling him to stay off… but he’s still there. Apparently he’s never read Part 97.205(e). I guess we’re all going to have to deal with the occasional problem-child now and then. 73, Mike WM4B
[Repeater-Builder] Toko Filters for 902-928 MHz Available
I have some Toko front end filters that, with a little ingenuity, could be used in various radios for 902 MHz ham band conversions. They're the 4DFA-915E-10 2 pole surface mount version of the filters we've been using in the Maxtracs (which are 3 pole through hole devices). Here's a link to the spec sheet: http://www.toko.co.jp/products/pdf/filters_dielectric/4dfa_4dfb.pdf It seems to me that one or two of these on a daughter board could replace the 3 pole unit. Or you could just solder some left over resistor leads to the main board and tack the filters to those leads. If you'd like to try it, they're $5 for a pair, shipping included. Email for payment details. If a direct message doesn't get through, try w...@arrl.net. Jeff W6JK
RE: [Repeater-Builder] Re: 2 meter noise help!
We're working that now. putting that last tidbits of info together for the Field Office in Atlanta and for the main office in DC. Maybe Riley's replacement will be chomping at the bit looking for something to do! 73, Mike WM4B From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ralph Mowery Sent: Thursday, January 29, 2009 6:16 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: 2 meter noise help! After all that have you sent the FCC a complaint about him ? They should step in and help you. --- On Wed, 1/28/09, Mike Besemer (WM4B) mwbese...@cox.net wrote: From: Mike Besemer (WM4B) mwbese...@cox.net Subject: RE: [Repeater-Builder] Re: 2 meter noise help! To: Repeater-Builder@yahoogroups.com Date: Wednesday, January 28, 2009, 10:18 PM H. got one of those on our systems too. We even told him to stay off. sent him certified mail, email, and have recordings of control ops telling him to stay off. but he's still there. Apparently he's never read Part 97.205(e). I guess we're all going to have to deal with the occasional problem-child now and then. 73, Mike WM4B image001.jpgimage002.jpg
[Repeater-Builder] Re: E.F Johnson Repeaters
Danny, There is some quoted text from ICM in blue, and pictures, showing which channel elements that ICM will re-crystal here: http://aa9nv.r2i.net/equipment.htm Go to the Johnson repeater section. I sent you my correspondence from ICM direct. Last quote I had was $115.45 each element or $20.95 each crystal if you know someone willing to do the job. Travis AA9NV --- In Repeater-Builder@yahoogroups.com, D. n5...@... wrote: -- Thanks Tony, I will do just that. Thats the best news that i have had on the E.F. Jhohnson machines in a while. Cheers Mate, Danny - In Repeater-Builder@yahoogroups.com, tonyn2mft TonyN2MFT@ wrote: Danny ICM rerocked a pair for me last year. Not a problem. They were for the CR1010 from 450 to 444Mhz. From the thread Eric suggested you contact ICM and send them the whole elements. That was exactly what I did and the cost was $168.65 shipped. Turn around time was less than 10 days. Call ICM. They were very helpful. Tony N2MFT
[Repeater-Builder] Wanted 2 Meter Preamp
Hello All, Thanks for all of you that replied to my original email. I already know what I need, and what I need to do. Thanks. However nobody addressed the subject of WANTED. So, here it is again WANTED... In Need of to install I am a looking for a preamp to go on the WR6ABD 2 meter repeater on Mt. Loma Prieta in San Jose. The club does not have a lot of money these days, and membership dropping fast! We are currently running a GE Master II with .5uv sensitivity into split antennas spaced vertically about 50' with 1 pass bottle on TX and one on RX. One duplexer on 2 meters is broken internally, and buried in the cabinet. A full day just to get out and back in. Not to mention repairing the solder joints. I am looking for a suitable preamp with low noise for the receiver. Something like an Angle, ARR, VHF Engineering etc. I will be going up to Loma Prieta this next weekend Jan. 31 to do some other work. It would be great if I had one in hand to install. If I can find one in the Monterey/SF Bay area that would be awsome, and could pick up. Please email me directly wa6...@msn.com or call me at 831-901-0050 if you have what the LPRC needs. Thanks and 73... Scott WA6LIE www.lprc.net www.remotehams.com PS.. Heading to our site this Saturday, as seen above..
Re: [Repeater-Builder] Wanted 2 Meter Preamp
Call Chip at AngleLinear and be done with it. You'll never regret it Ken At 05:32 PM 1/29/2009, Scott Avery wrote: Hello All, Thanks for all of you that replied to my original email. I already know what I need, and what I need to do. Thanks. However nobody addressed the subject of WANTED. So, here it is again WANTED... In Need of to install I am a looking for a preamp to go on the WR6ABD 2 meter repeater on Mt. Loma Prieta in San Jose. The club does not have a lot of money these days, and membership dropping fast! We are currently running a GE Master II with .5uv sensitivity into split antennas spaced vertically about 50' with 1 pass bottle on TX and one on RX. One duplexer on 2 meters is broken internally, and buried in the cabinet. A full day just to get out and back in. Not to mention repairing the solder joints. I am looking for a suitable preamp with low noise for the receiver. Something like an Angle, ARR, VHF Engineering etc. I will be going up to Loma Prieta this next weekend Jan. 31 to do some other work. It would be great if I had one in hand to install. If I can find one in the Monterey/SF Bay area that would be awsome, and could pick up. -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net We don't just make 'em. We use 'em!
RE: [Repeater-Builder] Micor Repeater
If I remember right, Motorola's spec is 92 watts out of the amplifier should yield 75 watts out the back of the station. That translates into 0.9 dB loss through the antenna network (isolator, LPF, etc.). Sounds like your 1 dB is about right...it may be a tenth or two higher since it's being used out-of-band a bit. --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ralph S. Turk Sent: Thursday, January 29, 2009 11:36 AM To: Repeater-Builder Cc: David Turk Subject: [Repeater-Builder] Micor Repeater Hi All. I am working on several Micor repeaters for use in Montana linking back to Tucson via the inter-net. These are standard 75 watt complete Micor stations. My problem is with the built in circulator that is feed by the PA prior to the duplexer. I have tuned the circulator using both a signal generator and spectrum Analyzer and used the tracking generator method. I can not get the loss down below 1 db. Is this normal? Other single stage circulators I have used in the past have had less the 1/2 db loss. Any Ideas. I suspect the harmonic filter is the problem but have not tried to take on apart to see. Ralph, W7HSG No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.10.12/1911 - Release Date: 1/29/2009 7:13 AM
RE: [Repeater-Builder] Motorola Maxar mods for 6M?
Dennis, The Maxar is a low-end, economy radio that may be difficult to convert to 6m. I tried to convert some VHF high-band Maxars to 2m, and found their performance to be disappointing- even after doing all of the capacitor changes. I must assume that the low-band models may be equally problematic. If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. You really should have the service manual on-hand before trying to modify the radio out of band. The good news is that manual 6881033E75 is still available from Motorola Parts. The bad news is that it costs about $58. My advice is to pass on the Maxar and find a low-band MaxTrac. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! Other than programming it to 6m and tweaking the VCOs, it works perfectly without any modification. That may be the exception to the rule, but it just happened to work for me. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dennis Ashworth Sent: Wednesday, January 28, 2009 8:48 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Maxar mods for 6M? I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated Tnx Dennis, K7FL Battle Ground, WA
RE: [Repeater-Builder] Wanted 2 Meter Preamp
Scott, Would you be interested in a brand new unopened ARR P150VDG preamp? Unscrew the cover to tune it to your freq and you're all set. This GaAsFET preamp has the lowest noise factor in ARR's line. They're $120 new but I'd let this spare one go for $80 including shipping. Reply to me direct (off this reflector) if interested. Gary N6LRV _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Scott Avery Sent: Thursday, January 29, 2009 5:32 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Wanted 2 Meter Preamp Hello All, Thanks for all of you that replied to my original email. I already know what I need, and what I need to do. Thanks. However nobody addressed the subject of WANTED. So, here it is again WANTED... In Need of to install I am a looking for a preamp to go on the WR6ABD 2 meter repeater on Mt. Loma Prieta in San Jose. The club does not have a lot of money these days, and membership dropping fast! We are currently running a GE Master II with .5uv sensitivity into split antennas spaced vertically about 50' with 1 pass bottle on TX and one on RX. One duplexer on 2 meters is broken internally, and buried in the cabinet. A full day just to get out and back in. Not to mention repairing the solder joints. I am looking for a suitable preamp with low noise for the receiver. Something like an Angle, ARR, VHF Engineering etc. I will be going up to Loma Prieta this next weekend Jan. 31 to do some other work. It would be great if I had one in hand to install. If I can find one in the Monterey/SF Bay area that would be awsome, and could pick up. Please email me directly wa6...@msn.com or call me at 831-901-0050 if you have what the LPRC needs. Thanks and 73... Scott WA6LIE www.lprc.net http://www.lprc.net/ www.remotehams.com PS.. Heading to our site this Saturday, as seen above..
[Repeater-Builder] Busco en manual del equipo BLITZ CL-150
Busco en manual del equipo BLITZ CL-150 I look in manual of the team BLITZ CL-150 Enrique Esteban POINSOT LU6VID Grid Locator FE89ME 40º 49' 16 S 62º 59' 24 W Guemes 831 - Viedma Río Negro Patagonia Argentina
Re: [Repeater-Builder] Re: 2 meter noise help!
Since Riley retired last summer, there has not been one single amateur radio enforcement action by the FCC Draw your own conclusions... - Original Message - From: Ralph Mowery ku...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 29, 2009 5:15 PM Subject: RE: [Repeater-Builder] Re: 2 meter noise help! After all that have you sent the FCC a complaint about him ? They should step in and help you. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:repeater-builder-dig...@yahoogroups.com mailto:repeater-builder-fullfeatu...@yahoogroups.com * To unsubscribe from this group, send an email to: repeater-builder-unsubscr...@yahoogroups.com * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: Motorola Maxar mods for 6M? Vertex FTL-1011 and Kenwood TK-6110
I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated The Maxar Radios do go out of band ... but when you travel farther from the design as-built range mods become much more intense. In specific the receiver pre-selector and some of the (injection) stages become cumbersome to optimize any distance from square one. But I've done or been involved with a few UHF Conversions and they do make fairly bullet proof radios for our past packet radio work (even at 9600 baud). If you have a high range 42-50 MHz (as an example) radio you might be able to move it into the lower end of the 6 meter band... but probably not easily into the higher 3MHz section without serious modifications. The Maxar is a low-end, economy radio that may be difficult to convert to 6m. Actually... the Moxy was the low-end model... the Maxar Radios came in a few different flavors and they were not cheap or considered low tier by any means... well maybe when held against some of Motorhead's really high end (expensive) radios. Maxar radios are/were solid fairly well designed radios... If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. Yeah but if you order the crystal right... it's more than good enough... especially at/in low band. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! It is/was a very, very good deal... Some of the Vertex FTL-1011 low band radios are also sleepers. Dealing with the software is a potential cluster... but it can be sorted out and made to work. If you find/buy the Kenwood TK-6110 low band mobile I'll tell you how to make it cover 29.5 to 54 MHz with excellente' performance. (... of course as a Kenwood Dealer I'm biased). If you can get the Maxar cheap and you have the time and patience of job... you can get it up on 6 meters. But some of us are asking how practical that is when some of the newer programmable radios can be had for nearly a song (fairly cheap compared to their original cost). cheers, skipp skipp025 at yahoo.com
Re: [Repeater-Builder] Re: 2 meter noise help!
Forwarded from a friend There is a new sheriff in town. The FCC has appointed Laura Smith to take Riley Hollingsworth's former position in enforcement. The FCC's Special Counsel for Amateur Radio slot has gone unfilled for 6 months thus she has a backlog of work ahead of her. Fortunately she is up to the task. Laura is a seasoned FCC veteran with a broad communications background at both the FCC and in the private sector. The FCC has been slow to fill the position and for a while we wondered if Riley's successor would ever be named. It looks like they were waiting for the right person. Now that Laura is on the job, let's give her our full support. If you have an enforcement issue, she may be reached by e-mail at: laura (dot) smith (at) fcc (dot) gov Amateur radio has always been somewhat self policed but when peer pressure is not enough to maintain civility, then a stronger hand is needed. The FCC has the muscle to demand compliance of the few wayward operators. We can help also. Our bands are not perfect, newer licensee's need guidance on how to properly share the many bands, frequencies and modes of operation that we radio amateurs are privileged to use. Reach out and guide (elmer) someone so that they do not become an enforcement issue. That is part of elmering also; it is not just about technical items. I know that some of you are wondering, Is Laura a ham? No, not yet, but she does have the study guides. If you attend the Dayton Hamvention 2009 May 15-17, you will have a chance to visit with her. We welcome Laura to this position and wish her success. 73, Terry Graves, K7FE Editor QRZ.COM At 07:36 PM 01/29/09, you wrote: Since Riley retired last summer, there has not been one single amateur radio enforcement action by the FCC Draw your own conclusions... - Original Message - From: Ralph Mowery ku...@yahoo.com To: Repeater-Builder@yahoogroups.com Sent: Thursday, January 29, 2009 5:15 PM Subject: RE: [Repeater-Builder] Re: 2 meter noise help! After all that have you sent the FCC a complaint about him ? They should step in and help you. Yahoo! Groups Links
Re: [Repeater-Builder] Motorola Maxar mods for 6M?
Tnx Eric - that may be good advice. I did find manuals ...not at $58, but still plenty expensive ... and I'd still need a crystal ($25-30). I want to replace a 6M beacon so RX not an issue ... but will need to mod for CW. This mod (in my limited experience) usually means getting into things and keying in front of the driver - also not very optimal. I might just build something myself - not tough if crystal controlled at 50Mhz, CW and 10-15w output max. Thanks Dennis, K7FL Battle Ground, WA == Eric Lemmon wrote: Dennis, The Maxar is a low-end, economy radio that may be difficult to convert to 6m. I tried to convert some VHF high-band Maxars to 2m, and found their performance to be disappointing- even after doing all of the capacitor changes. I must assume that the low-band models may be equally problematic. If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. You really should have the service manual on-hand before trying to modify the radio out of band. The good news is that manual 6881033E75 is still available from Motorola Parts. The bad news is that it costs about $58. My advice is to pass on the Maxar and find a low-band MaxTrac. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! Other than programming it to 6m and tweaking the VCOs, it works perfectly without any modification. That may be the exception to the rule, but it just happened to work for me. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dennis Ashworth Sent: Wednesday, January 28, 2009 8:48 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Maxar mods for 6M? I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated Tnx Dennis, K7FL Battle Ground, WA Yahoo! Groups Links
RE: [Repeater-Builder] Iso-coupler
1,000 foot AM tower? --- On Wed, 1/28/09, Jeff DePolo j...@broadsci.com wrote: From: Jeff DePolo j...@broadsci.com Subject: RE: [Repeater-Builder] Iso-coupler To: Repeater-Builder@yahoogroups.com Date: Wednesday, January 28, 2009, 6:11 PM Got and opportunity to locate a repeater on a nice tall 1000 watt broadcast tower.I need an iso-coupler. Where is the best place to order one? Who has the best pricesthese things are not cheap.It will need to be cut to freq of course ron Call Sinan at Armstrong Transmitter (www.armstrongtx.com). His are decent, and affordable, for the low-power version. Kintronic Labs (www.kintronic.com) and Audiolab (www.audiolabelectronics.com) are two others. I've used the former but not the latter - they're nice but expensive. I won't get into it, but I guess you know there are FCC regs (and some new rulemaking propsed) that deal with installing antennas (as well as erecting towers) on and near AM broadcast stations. Just want to make sure you don't get yourself into something you weren't expecting... --- Jeff WN3A Yahoo! Groups Links
Re: [Repeater-Builder] Re: Motorola Maxar mods for 6M? Vertex FTL-1011 and Kenwood TK-6110
How about a GE delta low band. There programmable with 128 channels w/990 control head. 90- 100 watts and they tune fairly easy, no modifications. Dean. --- On Thu, 1/29/09, skipp025 skipp...@yahoo.com wrote: From: skipp025 skipp...@yahoo.com Subject: [Repeater-Builder] Re: Motorola Maxar mods for 6M? Vertex FTL-1011 and Kenwood TK-6110 To: Repeater-Builder@yahoogroups.com Date: Thursday, January 29, 2009, 11:11 PM I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated The Maxar Radios do go out of band ... but when you travel farther from the design as-built range mods become much more intense. In specific the receiver pre-selector and some of the (injection) stages become cumbersome to optimize any distance from square one. But I've done or been involved with a few UHF Conversions and they do make fairly bullet proof radios for our past packet radio work (even at 9600 baud). If you have a high range 42-50 MHz (as an example) radio you might be able to move it into the lower end of the 6 meter band... but probably not easily into the higher 3MHz section without serious modifications. The Maxar is a low-end, economy radio that may be difficult to convert to 6m. Actually... the Moxy was the low-end model... the Maxar Radios came in a few different flavors and they were not cheap or considered low tier by any means... well maybe when held against some of Motorhead's really high end (expensive) radios. Maxar radios are/were solid fairly well designed radios... If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. Yeah but if you order the crystal right... it's more than good enough... especially at/in low band. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! It is/was a very, very good deal... Some of the Vertex FTL-1011 low band radios are also sleepers. Dealing with the software is a potential cluster... but it can be sorted out and made to work. If you find/buy the Kenwood TK-6110 low band mobile I'll tell you how to make it cover 29.5 to 54 MHz with excellente' performance. (... of course as a Kenwood Dealer I'm biased). If you can get the Maxar cheap and you have the time and patience of job... you can get it up on 6 meters. But some of us are asking how practical that is when some of the newer programmable radios can be had for nearly a song (fairly cheap compared to their original cost). cheers, skipp skipp025 at yahoo.com
[Repeater-Builder] Re: Motorola Maxar mods for 6M?
Denny, I would stay away for those Maxar's. They were never a very good radio, but they were a lot cheaper than buying a Maxtrac or Mitrek at the time they came out. I would stick with trying to find a 42-50 MHz Maxtrac or other synthesized radio. If you really want something in a crystal controlled radio, I would try and find a GE MVP or Motorola Mitrek 42-50 MHz radio. The MVP's are a front mount or under dash radio and about the same style and age as the Maxar, but are a much better radio. The Mitrek in my opinion is a big step up over the MVP, but they are little harder to interface to, since they are a rear mount radio with a remote control head. Let me know if I can be of any help. Joe - WA7JAW If you find a synthesized radio and need help programming it, let me know and I may be able to give you a hand or program it for you. --- In Repeater-Builder@yahoogroups.com, Dennis Ashworth k...@... wrote: Tnx Eric - that may be good advice. I did find manuals ...not at $58, but still plenty expensive ... and I'd still need a crystal ($25-30). I want to replace a 6M beacon so RX not an issue ... but will need to mod for CW. This mod (in my limited experience) usually means getting into things and keying in front of the driver - also not very optimal. I might just build something myself - not tough if crystal controlled at 50Mhz, CW and 10-15w output max. Thanks Dennis, K7FL Battle Ground, WA == Eric Lemmon wrote: Dennis, The Maxar is a low-end, economy radio that may be difficult to convert to 6m. I tried to convert some VHF high-band Maxars to 2m, and found their performance to be disappointing- even after doing all of the capacitor changes. I must assume that the low-band models may be equally problematic. If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. You really should have the service manual on-hand before trying to modify the radio out of band. The good news is that manual 6881033E75 is still available from Motorola Parts. The bad news is that it costs about $58. My advice is to pass on the Maxar and find a low-band MaxTrac. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! Other than programming it to 6m and tweaking the VCOs, it works perfectly without any modification. That may be the exception to the rule, but it just happened to work for me. 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Dennis Ashworth Sent: Wednesday, January 28, 2009 8:48 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Motorola Maxar mods for 6M? I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated Tnx Dennis, K7FL Battle Ground, WA Yahoo! Groups Links
Re: [Repeater-Builder] Re: Motorola Maxar mods for 6M? Vertex FTL-1011 and Kenwood TK-6110
Hi Skip I work for a Kenwood shop. I have installed dozens of TK-6110's. I tried to get one to program into 6m, but the software wouldn't let me. How do you do it? 73 de N5NPO - Original Message - From: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com To: Repeater-Builder@yahoogroups.com Repeater-Builder@yahoogroups.com Sent: Thu Jan 29 22:11:56 2009 Subject: [Repeater-Builder] Re: Motorola Maxar mods for 6M? Vertex FTL-1011 and Kenwood TK-6110 I have a Motorola Maxar, plate number D31TRA2300AK I scanned through the Repeater builder site and didn't find many hits on the model. I want to put this on 6M - any experience on how difficult it would be to insert a 6M crystal set/realign? Any thoughts or referrals would be most appreciated The Maxar Radios do go out of band ... but when you travel farther from the design as-built range mods become much more intense. In specific the receiver pre-selector and some of the (injection) stages become cumbersome to optimize any distance from square one. But I've done or been involved with a few UHF Conversions and they do make fairly bullet proof radios for our past packet radio work (even at 9600 baud). If you have a high range 42-50 MHz (as an example) radio you might be able to move it into the lower end of the 6 meter band... but probably not easily into the higher 3MHz section without serious modifications. The Maxar is a low-end, economy radio that may be difficult to convert to 6m. Actually... the Moxy was the low-end model... the Maxar Radios came in a few different flavors and they were not cheap or considered low tier by any means... well maybe when held against some of Motorhead's really high end (expensive) radios. Maxar radios are/were solid fairly well designed radios... If you buy your crystals from a reputable house like ICM, they will come with an appropriate compensation capacitor to provide rough temperature compensation- but it still drifts far more than a good channel element would. Yeah but if you order the crystal right... it's more than good enough... especially at/in low band. I bought a 2-channel MaxTrac (D51MJA93A5AK) two years ago, and paid $35 for it- one of the best deals I've ever made! It is/was a very, very good deal... Some of the Vertex FTL-1011 low band radios are also sleepers. Dealing with the software is a potential cluster... but it can be sorted out and made to work. If you find/buy the Kenwood TK-6110 low band mobile I'll tell you how to make it cover 29.5 to 54 MHz with excellente' performance. (... of course as a Kenwood Dealer I'm biased). If you can get the Maxar cheap and you have the time and patience of job... you can get it up on 6 meters. But some of us are asking how practical that is when some of the newer programmable radios can be had for nearly a song (fairly cheap compared to their original cost). cheers, skipp skipp025 at yahoo.com
