[Repeater-Builder] Re: Lookling to build a 220MHz repeater
A HAM friend of mine said he has a Mastr II Base Station I could use/have. Is this a better option than the mobile radio? Thanks, Duane --- In Repeater-Builder@yahoogroups.com, Gary Laforce [EMAIL PROTECTED] wrote: You should one need one master II. But it will have to modify for full duplex so do this as well as tuning it up completely on a vhf freq first before starting the mods so that you know you are working with a good unit. I have been a bench tech for years and that mod it not for someone that is new to bench work (I don't say this to be disrespectful or in any way I'm I try to put you down but if you haven't done this type of mod before you may what to find and Elmer to help you please don't take this the wrong way). NHRC make a good controller I have install a few of the 3's and 4's and they work 100%. With a mobile master II you should be able to run up to about 35 watts 100% duty with out a fan and you may ever get by with 50watts with a couple of good fans on the heat sink of the PA. On a master II make sure that you put a 10 ohm 10 watt load resister on the audio output or you will have an oscillation in you rx audio on the same note make sure to not ground either side of the audio output lines it is BTL audio or (floating) Hope this helps if you have more question or what ever fill free to email direct Gary LaForce Chariton Valley TriStar Communications Columbia Service Department Supervisor 573.441.2224 Direct Shop line 573.442.1147 Main Business Line 573.449.8310 Shop Fax line [EMAIL PROTECTED] 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] Re: Lookling to build a 220MHz repeater
derek_mcintyre wrote: I have read the posts some people have made concerning old VHF Engineering boards other cheap kits and how they are junk, but I'll bet it largely depends on who puts them together. My OM has a VHF Engineering 220 repeater that has been runnig for 25 years with almost no down time. The issue with the made-for-ham repeaters isn't down time, it's interference to others. Spurs, intermod generation, splatter, things like that. And yes, there are a few that have been 'baby-sat' by very knowledgeable people that have managed to clean them up and keep them that way for a long time. But it takes someone who knows what they're doing. Also on 220, because there is nearly nothing on adjacent bands, compared to other rptr bands, and few ham rptrs as well, I can see interference going unnoticed for a long time. Not saying that's an issue with yours, just that it's happened to others. -- Jim Barbour WD8CHL 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] Re: Lookling to build a 220MHz repeater
The radio is the same but it may be 100% duty depending on the type of pa in the station. They are easier to work on in base station config at least I thank so. I believe that you will be better off with this base station then a mobile unit. Keep in mind that the radio is the same it is just mounted differently. You still may have the issue of some freq may not work. See Kevin or Scott or the web for that info. Also in the base config the radio is already full duplex just pull all card out of the control shelf but the 10 volt reg card and then add your controller. The pull in NHRC controller will not work in the base cabinet I don't thank. You can always got with the MHRC 4 kit and build it your shelf for around $90.00 if there price has not changed. Gary LaForce Chariton Valley TriStar Communications Columbia Service Department Supervisor 573.441.2224 Direct Shop line 573.442.1147 Main Business Line 573.449.8310 Shop Fax line [EMAIL PROTECTED] -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Duane Brantley Sent: Thursday, April 28, 2005 7:46 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Re: Lookling to build a 220MHz repeater A HAM friend of mine said he has a Mastr II Base Station I could use/have. Is this a better option than the mobile radio? Thanks, Duane --- In Repeater-Builder@yahoogroups.com, Gary Laforce [EMAIL PROTECTED] wrote: You should one need one master II. But it will have to modify for full duplex so do this as well as tuning it up completely on a vhf freq first before starting the mods so that you know you are working with a good unit. I have been a bench tech for years and that mod it not for someone that is new to bench work (I don't say this to be disrespectful or in any way I'm I try to put you down but if you haven't done this type of mod before you may what to find and Elmer to help you please don't take this the wrong way). NHRC make a good controller I have install a few of the 3's and 4's and they work 100%. With a mobile master II you should be able to run up to about 35 watts 100% duty with out a fan and you may ever get by with 50watts with a couple of good fans on the heat sink of the PA. On a master II make sure that you put a 10 ohm 10 watt load resister on the audio output or you will have an oscillation in you rx audio on the same note make sure to not ground either side of the audio output lines it is BTL audio or (floating) Hope this helps if you have more question or what ever fill free to email direct Gary LaForce Chariton Valley TriStar Communications Columbia Service Department Supervisor 573.441.2224 Direct Shop line 573.442.1147 Main Business Line 573.449.8310 Shop Fax line [EMAIL PROTECTED] 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/
[Repeater-Builder] Re: Lookling to build a 220MHz repeater
Hi Duane, I am in the process of building a 220 repeater as well, pretty much from spare parts and whatever I can find. I found an exciter that once was part of a Clegg FM-76, and some sort of VHF Engineering receiver kit that was put together decades ago. The exciter runs around 500 mW and I have a Ramsey PA-20 power amp that should do 25 watts with that drive. I have heard of people taking Clegg FM-76's apart and using the receiver/transmitter and PA boards to make their repeaters with good success. I have several FM-76's and the Midland version of this radio but wouldn't dare take them apart just because I like the radios like they are. I have read the posts some people have made concerning old VHF Engineering boards other cheap kits and how they are junk, but I'll bet it largely depends on who puts them together. My OM has a VHF Engineering 220 repeater that has been runnig for 25 years with almost no down time. Hamtronics makes neat little boards for TX and RX, visit their page and see what they have to offer. Some people use Kendecomm (spelling?) which I am not familiar with, and also Spectrum made a 220 MHz repeater. I have heard of people making great success with modifying the Mastr II's but never tried (looks time consuming) I am in the process of making/modifying my own 220 duplexer. Where did you get yours and how much did you pay? What kind of antenna were you going to use? Contact me off list if you like 73, KC4FWC Hello everyone, I recently purchased 4-cavity duplexer for a 220MHZ repeater. I'm thinking about using a GE Mastr II mabile radio for the Rx/Tx part. I'm very green at this and figuring this out on my own. Do I need 2 Mastr II radios, or will one work? I will modify it for 220 service once I know how many I need to get. Also, is the NHRC-3/M2+ a good comtroller for $189? Or is there a better one. This will be a low power repeater . Looking to run 30-50 watts. Thanks for the help, Duane KD5NFQ 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/
