Re: [Repeater-Builder] Re: UHF Radio recommendations ??
John, I use one at 442.150/447.150 with no problem John -- John Mc Hugh, K4AG Coordinator for Amateur Radio National Hurricane Center, WX4NHC Home page:- http://www.wx4nhc.org John Barrett wrote: I've had some off-list replies from others who have used the 820
RE: [Repeater-Builder] Re: UHF Radio recommendations ??
It looks like I'm going to have a Kenwood TKR-820 shortly :-) Spent a little more on it than I wanted to, but being the lazy sod that I am, it seemed a little easier than putzing around with multiple radios :-) I'd really appreciate any info on programming the 820 without having to use the KPT-50 programmer - I've already found some information, but it would be a great help if I could confirm the procedure. _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Doug Dickinson Sent: Friday, November 02, 2007 3:59 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF Radio recommendations ?? I like the idea of using some of the old brick outhouse type radios. The MasterII and Micor are about as bulletproof as a radio can get. Another idea that I saw on the web is to use a couple of portable radios (i.e. MT1000 or P200 Motorola) radios as the Receiver and the exciter and then use a commercial PA of your choosing. If you add some of the mechanical folters from an old Micor, you could have a programmable, multi-channel device for not too much money. It will take a lot more time, than the modified mobile. My $0.02 worth. Good luck. This could be a fun project.
RE: [Repeater-Builder] Re: UHF Radio recommendations ??
John, You are going to have a fun time getting the repeater to receive down that far. Those repeaters don't quite have the front end as the newer TKR repeaters have. Mike Mullarkey (K7PFJ) _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of John Barrett Sent: Monday, November 05, 2007 6:26 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF Radio recommendations ?? It looks like I'm going to have a Kenwood TKR-820 shortly :-) Spent a little more on it than I wanted to, but being the lazy sod that I am, it seemed a little easier than putzing around with multiple radios :-) I'd really appreciate any info on programming the 820 without having to use the KPT-50 programmer - I've already found some information, but it would be a great help if I could confirm the procedure. _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Doug Dickinson Sent: Friday, November 02, 2007 3:59 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF Radio recommendations ?? I like the idea of using some of the old brick outhouse type radios. The MasterII and Micor are about as bulletproof as a radio can get. Another idea that I saw on the web is to use a couple of portable radios (i.e. MT1000 or P200 Motorola) radios as the Receiver and the exciter and then use a commercial PA of your choosing. If you add some of the mechanical folters from an old Micor, you could have a programmable, multi-channel device for not too much money. It will take a lot more time, than the modified mobile. My $0.02 worth. Good luck. This could be a fun project.
RE: [Repeater-Builder] Re: UHF Radio recommendations ??
I've had some off-list replies from others who have used the 820 successfully.. its even mentioned on the RB Kenwood page, which is why I jumped on the auction. But I've also heard a few saying what you have (unfortunately AFTER I won the 820 !!). if it doesn't work out, I can always unload it and try again. _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Mullarkey Sent: Monday, November 05, 2007 7:48 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF Radio recommendations ?? John, You are going to have a fun time getting the repeater to receive down that far. Those repeaters don't quite have the front end as the newer TKR repeaters have. Mike Mullarkey (K7PFJ) _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of John Barrett Sent: Monday, November 05, 2007 6:26 AM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] Re: UHF Radio recommendations ?? It looks like I'm going to have a Kenwood TKR-820 shortly :-) Spent a little more on it than I wanted to, but being the lazy sod that I am, it seemed a little easier than putzing around with multiple radios :-) I'd really appreciate any info on programming the 820 without having to use the KPT-50 programmer - I've already found some information, but it would be a great help if I could confirm the procedure. _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Doug Dickinson Sent: Friday, November 02, 2007 3:59 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF Radio recommendations ?? I like the idea of using some of the old brick outhouse type radios. The MasterII and Micor are about as bulletproof as a radio can get. Another idea that I saw on the web is to use a couple of portable radios (i.e. MT1000 or P200 Motorola) radios as the Receiver and the exciter and then use a commercial PA of your choosing. If you add some of the mechanical folters from an old Micor, you could have a programmable, multi-channel device for not too much money. It will take a lot more time, than the modified mobile. My $0.02 worth. Good luck. This could be a fun project.
Re: [Repeater-Builder] Re: UHF Radio recommendations ??
Mike Mullarkey wrote: John, You are going to have a fun time getting the repeater to receive down that far. Those repeaters don't quite have the front end as the newer TKR repeaters have. Wait-what? I've taken a BUNCH of TKR-820's down to the 440-450 segment with NO problems at all. Going below 440 is tough, but they make a 406-430 split for that! If your 820 doesn't work in that segment, it is likely defective, or not really a 450-470 split (-1). Look at the FCC ID. It should end with -1. If it ends with a different number, it is for another split. -4 is the 406-430 split I mentioned. -2 and -3 are of no value in the ham bands (above 470). -- Jim Barbour WD8CHL
RE: [Repeater-Builder] Re: UHF Radio recommendations ??
Mike, FWIW - I've moved two TKR-820's down into the 440 band with no issues - both are happily playing on-the-air today. It seems you have had other experiences, though. Mark - N9WYS _ From: Repeater-Builder@yahoogroups.com On Behalf Of Mike Mullarkey John, You are going to have a fun time getting the repeater to receive down that far. Those repeaters don't quite have the front end as the newer TKR repeaters have. Mike Mullarkey (K7PFJ) _ From: Repeater-Builder@yahoogroups.com On Behalf Of John Barrett It looks like I'm going to have a Kenwood TKR-820 shortly :-) Spent a little more on it than I wanted to, but being the lazy sod that I am, it seemed a little easier than putzing around with multiple radios :-) I'd really appreciate any info on programming the 820 without having to use the KPT-50 programmer - I've already found some information, but it would be a great help if I could confirm the procedure.
Re: [Repeater-Builder] Re: UHF Radio recommendations ??
On Fri, 2 Nov 2007, wb6ymh wrote: The 30 watt version is a better radio for repeater service since all solid state transmitters are very inefficient when run below their designed output. A 30 watt Mitrek running at 15 watts will probably last forever, but a 50 watt Mitrek running at 20 watts gets way too hot for my tastes. It would probably be ok with a fan, but I really didn't want a fan for numerous reasons. Well the radio is only specified to run a certain percentage in transmit anyway, but at this point, you can probably get a dump-truck load of Mitreks for the asking. That will give you enough radios to keep the repeater running until Doomsday. All you need is a few channel elements, and you can skip using lightning protection altogether. If a Mitrek falls in the forest, does it make a noise? -- Kris Kirby, KE4AHR [EMAIL PROTECTED] But remember, with no superpowers comes no responsibility. --rly
Re: [Repeater-Builder] Re: UHF Radio recommendations ??
-Original Message- From: wb6ymh [EMAIL PROTECTED] Sent: Nov 2, 2007 10:28 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: UHF Radio recommendations ?? --- In Repeater-Builder@yahoogroups.com, George Henry [EMAIL PROTECTED] wrote: And the Mitrek is just about the easiest radio to convert... snip two diodes, jumper your channel elements hot full-time, disable the T/R relay add a 2nd antenna connector, controller of your choice, and duplexer. And already in a nice, RF-tight enclosure, to boot! I picked up a 55-watter on E-Bay recently for $10 plus $10 shipping! I don't see very many MASTR II's pop up on E-Bay, though. Yup Mitreks are great, but please don't imply that a 55-watter will last in repeater service at anywhere near 50 watts. (They are actually spec'ed at 50 watts, but mine did 80+ full tilt). I was really just commenting on the price, not recommending any particular power level. The 30 watt version is a better radio for repeater service since all solid state transmitters are very inefficient when run below their designed output. A 30 watt Mitrek running at 15 watts will probably last forever, but a 50 watt Mitrek running at 20 watts gets way too hot for my tastes. It would probably be ok with a fan, but I really didn't want a fan for numerous reasons. Since I'm using mine to drive an Micor PA I bypassed the finals and driver transistor and got 10 watts out with about 2 amps in. In that configuration it just barely gets warm. Since the Micor amp only requires about a watt drive I have the power output turned all the way down. 73's Skip WB6YMH I am adding a generous amount of additional heatsink material to mine, as well as 2 brushless fans (one PTT-triggered with a 5 minute run-on after last key-up, and one thermostatically controlled), and will be running it at 30 watts (I was told by a local Motohead to never run them at less than 60% design power). If I find that it gets too warm, I have a couple of outboard PA options available, but due to space considerations where I am hoping to get this sited, I'd like to keep it as self-contained as possible. George, KA3HSW / WQGJ413
