Thanks Mike. Every little "tid bit" I find I print and file. Your information is very good and I can see using some of as my repeater(s) develop. Likewise I'm printing everything from the links you mentioned for the same reason. Great!
You see I have 4 more stations to eventually put to use. Three are continous duty machines built to the specs of a large oil refinery and one is a low power UHF machine used for inter-refinery comunication. Oddly enough it has continous duty components too. All have the metering options, cw idenfier and anything else Motorola could push the price up with, I suppose. Nothing against Motorola, just an observation. I have the COR working in my currently project now. The receiver is going to be an exceptional one but it is not passing audio to the exiter. I can hear local audio from the speaker I tied in and the squelch is adjustable via the Squelch Gate card now. I don't know wheather to suspect yet another jumper somewhere or possibly a issue on the SG card. I also crystaled up the transmitter last night and nothing is coming through the PA. I believe I have more than enough drive. This was a working remote base when it was removed from an area airport. It was in the control tower. Thanks again..Don..N5MZQ --- In [email protected], Mike Morris WA6ILQ <[EMAIL PROTECTED]> wrote: > > Lots more info at www.repeater-builder.com, then select > Motorola, then select Micor. > > Or here's a shortcut: > <http://www.repeater-builder.com/rbtip/micor-index.html> > > When I converted my first Micor station (a UHF one) I went through > everything you are, and didn't have the web as a resource. I spent > several weeks of evenings and took lots of notes as I went. Today the > repeater-builder Micor page has a consolidated collection of info, > from folks all over the country that have donated their experiences. > > The conversion from Joel Huntley WA1ZYX is closest to the > way my first station ended up, and I'd suggest you start reading > there. One difference I did was that I didn't use the jumper > between J2-6 to J2-14 the way he did. One point is receive > audio, the other is the audio amplifier input. I put a rotary switch > in the small panel that holds the volume and squelch controls, > and wired it in place of the jumper: one position is the receiver > audio, another is transmitter audio, and the third monitors the > autopatch line through a transformer and a capacitor. > > My last station I used the method of connecting via the > squelch gate card slot, only I left the actual squelch gate > card alone (a common mod is to add a multipole center-off > toggle switch and a DB9 connector to the faceplate).... > > I took a timeout timer card and stripped it, and added some > more pins to the edge connector (actually I took another dead > card and scavenged the pins from it). > I then mounted a DB15 female connector, a fuseholder and a > few LEDs to the metal end of the timeout timer card, plus a > few audio coupling capacitors and a couple of level translation > transistors on a piece of perfboard mounted to the card itself. > Unfortunately I didn't take any pictures. > > A cable from that DB15 connects to the repeater controller. > The common name within our group for that modified card is > the interconnect card. > > Normally the system runs on the external controller, through > the interconnect card, but if I need to do some work on it I can > power down the system, unplug the interconnect card and > plug in the squelch gate card, which normally lives in a > antistatic bag in the old Craftsman toolbox in the bottom > of the rack. > > Mike WA6ILQ > > > At 05:22 AM 11/15/05, you wrote: > > >Thanks for the info, I'll look for that .doc file, it's always good to > >add to the Micor library. > > > >I cut one end of the diode loose on the interconnect board and guess > >what? The COR is now working and TOT card is normal and the Squelch > >Gate card now has control of the squelch. I still think this one will > >have an excectional receiver since I have yet to fine tune it and I > >can break squelch under .2 microvolt. > > > >Next problem (which I have not started troubleshooting) appears to be > >the fact it's not passing audio. I can hear audio on a local speaker I > >connected up (receiver 2 does have the 15watt amp). No audio at all is > >passing, not even low and muted. > > > >I also crystaled up transmit last night and I appear to have decent > >enough drive out of the exiter but nothing from the PA at all. This > >was a working machine when the control wires were cut. It was at a > >national airport that was being shut down and was used as a remote > >base five stories down in the control tower. > > > >Any suggested starting points for the lack of audio and PA issues? > >I appreciate your help...Don N5MZQ > > > > > >--- In [email protected], "Kevin King" <[EMAIL PROTECTED]> wrote: > > > > > > Do a search for this document "C71RCB-2.DOC" it is for the > >conversion of a 6 > > > meter base. but it does have good note for working with the control > > > functions of the station. > > > > > > Try repeater-builder and google. If you can not locate it give me > >your email > > > and I will forward it to you. > > > > > > Kevin King SCSA BSCIS > > > ARS KC6OVD > > > GMRS KAG0378 > > > EIEIO 2722 > > > Acworth Georgia > > > > > > > > > -----Original Message----- > > > From: [email protected] > > > [mailto:[EMAIL PROTECTED] Behalf Of donlspivey > > > Sent: Monday, November 14, 2005 9:01 AM > > > To: [email protected] > > > Subject: [Repeater-Builder] Micor Base To Repeater Conversion Problems.. > > > > > > > > > Although I haven't spent a huge amount of time on what should be a > > > simple conversion, I would like to get the opinion of a Micor guhru or > > > two. > > > > > > I'm converting a Micor base to repeater duty. It was originally a dual > > > receiver single transmitter intermittant duty machine on 149mhz (yup, > > > both receivers on 149.xxx). I'll deal with the limited heat sink on > > > xmit and shielding by greatly reduced power and fans if needed. It > > > will be carrier squelch for now, it does not have factory PL. I will > > > probably modify for a external controller but much later. > > > > > > The receiver blew my mind. I haven't even tuned it by the book yet and > > > I can see it is super sensitive. I hope selectivity will be there too. > > > > > > My problem is getting it to repeat. I made (I assume) all necessary > > > jumpter changes on the modules as well as cage and receiver > > > interconnect boards. I can go into xmit manually proving the ptt line > > > works. Otherwise, no repeat. I did have one small problem that > > > actually may have helped see the whole picture. I lost a diode > > > (shorted CR16) on the squelch gate card that send the machine into > > > continuous xmit. I killed the pa but left the exciter up to get a > > > better look at it. While held in xmit, I noticed that I could set the > > > squelch on the SG board like it should be and although not quite > > > right, the timeout timer was working. It actually backwards. It times > > > out with squelch closed but doesn't when open. Probably due to the > > > state of that ptt line. > > > > > > Anyway. Any ideas as to where to concentrate on to get a better idea > > > why I can't get it to repeat. Remember; I could set the squelch > > > threshhold on the SG module when that diode held transmit on. > > > Otherwise it does nothing. I know I'll slap myself when I find it, but > > > maybe one of you guys have already "been there and done that". Thanks > > > for your help...Don...N5MZQ > > > > > > > > > > > > > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > > > > > > > > >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/
