Re: [Repeater-Builder] Motorola Maxar mods for 6M?
Dennis Ashworth wrote: 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 I have a Maxar-80 on 6M now, and it covers 52.525 and the big local repeater just fine (no more than 400 KHz spread however). When I got it, it had already been setup on 6, so I don't know what if any modes may have been done, but I can't believe there was much done. I can see how it might not work as well on 53 MHz freqs, but below should be fine. For what you want to do, I suspect it will be much lower in band, and less of a problem. Also you more likely want a xtal controlled radio for quicker key-up/key-down times. Some synth radios are a little slow, or a little noisy in the first few mS.
RE: [Repeater-Builder] Motorola Maxar mods for 6M?
There's also the Maxar-50... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Tuesday, February 03, 2009 12:31 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Motorola Maxar mods for 6M? Eric Lemmon wrote: Keep in mind that a Maxar-80 is not the same as a Maxar. There are some similarities, to be sure, but what works in a Maxar-80 may not necessarily work in a Maxar. Each radio model has its own idiosyncrasies. Some individual radios of a given model may convert to 6m easily, while other identical radios require some work. YMMV... 73, Eric Lemmon WB6FLY Well, about the only difference between the Moxy, Maxar, and Maxar-80, other than vintage (the M-80 is newer), is that basically, to get to the next model down, they pretty much just took out parts. The M-80 has the most helicals and filtering, the Maxar has had some of that removed, and the Moxy has had most of it removed. Among a few other things.
Re: [Repeater-Builder] Motorola Maxar mods for 6M?
Eric Lemmon wrote: There's also the Maxar-50... 73, Eric Lemmon WB6FLY Well, yeah...but it WAS a horse of a different color ;c}
RE: [Repeater-Builder] Motorola Maxar mods for 6M?
Keep in mind that a Maxar-80 is not the same as a Maxar. There are some similarities, to be sure, but what works in a Maxar-80 may not necessarily work in a Maxar. Each radio model has its own idiosyncrasies. Some individual radios of a given model may convert to 6m easily, while other identical radios require some work. YMMV... 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of wd8chl Sent: Tuesday, February 03, 2009 11:37 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Motorola Maxar mods for 6M? Dennis Ashworth wrote: 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 I have a Maxar-80 on 6M now, and it covers 52.525 and the big local repeater just fine (no more than 400 KHz spread however). When I got it, it had already been setup on 6, so I don't know what if any modes may have been done, but I can't believe there was much done. I can see how it might not work as well on 53 MHz freqs, but below should be fine. For what you want to do, I suspect it will be much lower in band, and less of a problem. Also you more likely want a xtal controlled radio for quicker key-up/key-down times. Some synth radios are a little slow, or a little noisy in the first few mS.
Re: [Repeater-Builder] Motorola Maxar mods for 6M?
Eric Lemmon wrote: Keep in mind that a Maxar-80 is not the same as a Maxar. There are some similarities, to be sure, but what works in a Maxar-80 may not necessarily work in a Maxar. Each radio model has its own idiosyncrasies. Some individual radios of a given model may convert to 6m easily, while other identical radios require some work. YMMV... 73, Eric Lemmon WB6FLY Well, about the only difference between the Moxy, Maxar, and Maxar-80, other than vintage (the M-80 is newer), is that basically, to get to the next model down, they pretty much just took out parts. The M-80 has the most helicals and filtering, the Maxar has had some of that removed, and the Moxy has had most of it removed. Among a few other things.
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] 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] 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
