Back in the mid-1970's, one of the Central Oregon 2-way radio shops made a bunch of 2-Meter and 440-MHz Repeaters using E. F. Johnson mobile radios. They worked extremely well, and many of them are still going strong, all over the state, never having had a failure. The receivers were extremely sensitive, selective, and the transmitters survived long, key-down transmit cycles on very inaccessible remote mountaintops. And they were cheap, even back then!
Larry K7LJ Original Message: ----------------- From: Paul Finch [EMAIL PROTECTED] Date: Tue, 6 Jan 2004 20:13:17 -0600 To: [email protected] Subject: RE: [[Repeater-Builder] Repeater Help] Kevin, Are you looking for 2 meters or 440? You may want to look into a Johnson 530 or 559 depending on which band you want. They are cheap at swap fests and very dependable, I usually buy them for 5 to 15 dollars. I have been running one on each band for over five years and zero failures. Don't get me wrong, I feel there is not much better radio than a GE Master II, I have several of them also but for ease of conversion and if high power is not needed you can't beat the Johnson. Paul WB5IDM -----Original Message----- From: Kevin Bednar [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 8:01 PM To: [email protected] Subject: RE: [[Repeater-Builder] Repeater Help] Thanks for the reply James. I'll figure SOMETHING out. :) Kevin K2KMB ---------------------------------------------------------------------------- -- From: James [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 8:45 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] Kevin, I know that the RECTUM (oops spectrum) isn't much, but you mentioned frequency drift. First, you might want to go through the exciter board and resolder all connections (provided that you've checked the simple stuff, ie power supply regulation, dirty trimmers, etc.). If that does not yield anything, then maybe you could replace the trimmer for the xtal as it could be affected by temperature.Please don't flame me for trying to help him, i know how it can be when you have nothing to put on the air.JamesKevin Bednar wrote:Unfortunately, we have NO usable radio right now. The old Mastr II was tossed a few weeks back and the POS Spectrum will be following shortly. :( I am actually in need of a complete UHF radio to convert now. :( Thanks for your reply though! I really appreciate all the help I get from this group! Kevin K2KMB ---------------------------------------------------------------------------- From: Maire Company [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 8:21 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] what kind of Micro parts do you need? ----- Original Message ----- From: Kevin Bednar To: [email protected] Sent: Tuesday, January 06, 2004 7:56 PM Subject: RE: [[Repeater-Builder] Repeater Help] Thanks Jim. I already checked the local shops, no luck. I'll keep looking. Kevin K2KMB -------------------------------------------------------------------------- From: James [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 7:44 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] Good luck, If you check with some of your local Motorola shops, Micors are coming out of service regularly (if any are left, I know we had a few). Micors and MastrII's in their virgin forms can be had cheap or free in many cases. Even if you get a mobile style of either, it is good. James Kevin Bednar wrote: Unfortunately James the unit was tossed a few weeks back. :( Kevin ------------------------------------------------------------------------ From: James [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 6:53 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] Mastr II PA's should be easy to rebuild?? A few new transistors, etc. and some TLC and that would work better than any ham grade stuff. unless of course it is lightning toast. James Kevin Bednar wrote: Unfortunately Joe, everything for this project is being donated for an OEM/RACES project to improve county coverage, specifically because of the lack of $$. I also wanted a Mastr II (got one donated but upon further inspection was missing a board and the PA was toast.) or a Micor but unfortunately no one was able to donate one. I myself would not want to go the ebay route because I wouldn't want to screw someone else over with the same POS problems I'm experiencing with it. Thanks. Kevin -----Original Message----- From: mch [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 5:28 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] Well, if you really have the 'anatomy' to do this: Sell it on eBay, take the money, and buy something that will work much better. (such as a used MASTR II or Micor) Personally, I wouldn't do that to someone else, but it is your choice. Joe M. Kevin Bednar wrote: I kinda figured that John from what I've been told, but unfortunately there is $0 to replace it with something else. I didn't pay for it so that's why I was trying to get it working. Thanks. Kevin -----Original Message----- From: JOHN MACKEY [mailto:[EMAIL PROTECTED] Sent: Tuesday, January 06, 2004 5:23 PM To: [email protected] Subject: Re: [[Repeater-Builder] Repeater Help] You can best modify the spectrum by replacing the following components: power supply, transmitter, receiver, controller. It should then perform well if you used good replacement parts. "kbednar99" <[EMAIL PROTECTED]> wrote: Ok, at the risk of being flamed I am gonna' ask this question anyway. ;) I have inherited a Spectrum Communications SCR-4000 repeater. Receive seems to work fine but the TX freq drifts after a few minutes no matter how many times I reset it. It has the TCXO option in it but it doesnt seem to matter. Any Ideas on what might be causing this? Spectrum has been LESS than helpful, other than to say "we discontinued it over 10 years ago and can't help you" and "we can sell you a manual if you want though!". Thats great. Also, does anyone know what mods are needed to run this unit with an outboard controller, as the Spectrum one sucks. Any and all help is GREATLY appreciated! Kevin K2KMB 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: http://docs.yahoo.com/info/terms/ Yahoo! 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