Re: [Repeater-Builder] buillding a repeater
You are absolutely correct ... (at least someone was reading very carefully...) Neil Jim B. wrote: [EMAIL PROTECTED] wrote: There was a factory forced air ass'y for MICOR repeaters? (other than for the 1/4 KW?) I know a few 100W 2-Meter and UHF 75-watt MICOR repeaters that need something like that, although muffin fans above the heat sink probably work fine, too. LJ Are you talking about this: C53MHY - 150.8 - 162 MHz - continuous duty repeater. (Came with the factory blower assembly.) That's a Motrac station. -- Jim Barbour WD8CHL 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/
Re: [Repeater-Builder] buillding a repeater
I agree about collecting Micor parts ... goes for GE-cor (Ok, Mastr II) too. The manufacturers haven't been supporting those radios in a very long time, you you don't sandbag for the day when you might need some spare parts, who will? I nearby friend just unloaded 8 more Micor cabinets with various radios in them last week. Part of that includes: C42RCB - 72-76 MHz Micor Station C71RTB - 42-50 MHz Micor Station (a two freq transmitter 2 one freq receivers.) C53MHY - 150.8 - 162 MHz - continuous duty repeater. (Came with the factory blower assembly.) Multi other stuff too. Ok, who is looking for what? I have enuf here to be able to part as the need ariszes. Neil - WA6KLA Mike Perryman wrote: If in fact the power control module turns out to be a problem let me know... I have a box full of them. Whenever I hear of someone throwing Micor components away I try to scarf them up. Just for repair parts, if nothing else 73's Mike K5JMP At 01:08 PM 06/02/2004 -0400, you wrote: You should see about 350-500 milliwatts going to the pa deck and the bias/control line must be connected properly to the station frame. Many times I see these stations for sale at hamfests with the jumper wire allowing the pa to run only full-tilt-boogey, which is why they crash and burn so often - the control circuit is there to help cut back or turn off the power when the swr gets bad from someone stepping on your feedline or the antenna falling away entirely from wind or who-knows-what. If I remember correctly the bias line is blue 18AWG wire, sample there in parallel to ground and switch to some 75 ohm feedline to the dummy load - the voltage has to change or the pa will burn up at the site. It is really helpful if you have manuals but as you may notice I do more with sample and trial then draw the schematic and continue troubleshooting along the path of suspicion, slow but very informative. David wrote: I have a problem. I have a micor base/repeater and over the weekend I tuned it up to my frequency and was testing out and I am not getting any power out the exciter is producing some power as I can hear the radio a hundred feet away with it going into a dummy load. the watt meter tested okay on another radio. the pa is getting power and I have tried adjusting the power control to no avail. I don't think the triple low level amp is working. but I am not sure how to fix it. -- 73...Clark Beckman N8PZD Yahoo! Groups Links - Mike PerrymanCavell, Mertz Davis, Inc. [EMAIL PROTECTED] Consulting Engineers http://www.cmdconsulting.com 7839 Ashton Avenue K5JMPManassas, VA 20109 USA (703) 392-9090; (703) 392-9559 fax; DC Line (202) 332-0110 - 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/
Re: [Repeater-Builder] buillding a repeater
[EMAIL PROTECTED] wrote: There was a factory forced air ass'y for MICOR repeaters? (other than for the 1/4 KW?) I know a few 100W 2-Meter and UHF 75-watt MICOR repeaters that need something like that, although muffin fans above the heat sink probably work fine, too. LJ Are you talking about this: C53MHY - 150.8 - 162 MHz - continuous duty repeater. (Came with the factory blower assembly.) That's a Motrac station. -- 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] buillding a repeater
Original Message: - From: Jim B. [EMAIL PROTECTED] Date: Thu, 03 Jun 2004 10:12:51 -0400 To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] buillding a repeater [EMAIL PROTECTED] wrote: There was a factory forced air ass'y for MICOR repeaters? (other than for the 1/4 KW?) I know a few 100W 2-Meter and UHF 75-watt MICOR repeaters that need something like that, although muffin fans above the heat sink probably work fine, too. LJ Are you talking about this: C53MHY - 150.8 - 162 MHz - continuous duty repeater. (Came with the factory blower assembly.) That's a Motrac station. -- Jim Barbour WD8CHL Sure enough, I missed the MH portion. LJ Yahoo! Groups Links mail2web - Check your email from the web at http://mail2web.com/ . 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] buillding a repeater
You should see about 350-500 milliwatts going to the pa deck and the bias/control line must be connected properly to the station frame. Many times I see these stations for sale at hamfests with the jumper wire allowing the pa to run only full-tilt-boogey, which is why they crash and burn so often - the control circuit is there to help cut back or turn off the power when the swr gets bad from someone stepping on your feedline or the antenna falling away entirely from wind or who-knows-what. If I remember correctly the bias line is blue 18AWG wire, sample there in parallel to ground and switch to some 75 ohm feedline to the dummy load - the voltage has to change or the pa will burn up at the site. It is really helpful if you have manuals but as you may notice I do more with sample and trial then draw the schematic and continue troubleshooting along the path of suspicion, slow but very informative. David wrote: I have a problem. I have a micor base/repeater and over the weekend I tuned it up to my frequency and was testing out and I am not getting any power out the exciter is producing some power as I can hear the radio a hundred feet away with it going into a dummy load. the watt meter tested okay on another radio. the pa is getting power and I have tried adjusting the power control to no avail. I don't think the triple low level amp is working. but I am not sure how to fix it. -- 73...Clark Beckman N8PZD 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] buillding a repeater
The other comments regarding the control line is a good one but allow me to pass on an experience I had in converting a mid-split UHF Micor station (C64RCB) to the ham band. Specifically, it needed to be moved *exactly* 10 Mhz down (it was on 451.875/456/875 and I was moving it to 441.875/446.875). Pure coincidence but there you go... The receiver was no sweat - it tuned to 446 painlessly. The transmitter was another story, perhaps because it was being moved so low. What I found was that the exciter was no biggie, as it tuned down easily enough (although I did parallel a 1 pf cap across 2 or 3 coils to center them in their range a bit better than they would without the new caps). Of course, the exciter makes power on VHF and is later tripled. But you can hear it just fine for quite a distance on its ultimate UHF channel. I followed the directions on the repeater builder webpage regarding tuning the SECOND bandpass assembly and the circulator but still couldn't get *any* power out of the PA. What I found I needed to also do was retune the FIRST bandpass filter assembly - the one between the exciter and the tripler stages. Once I did that, there was no problem at all in the xmtr making power. FWIW Ken At 09:34 AM 6/2/2004 -0400, you wrote: I have a problem. I have a micor base/repeater and over the weekend I tuned it up to my frequency and was testing out and I am not getting any power out the exciter is producing some power as I can hear the radio a hundred feet away with it going into a dummy load. the watt meter tested okay on another radio. the pa is getting power and I have tried adjusting the power control to no avail. I don't think the triple low level amp is working. but I am not sure how to fix it. Yahoo! Groups Links -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html AH6LE/R - IRLP Node 3000 http://www.irlp.net 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/
