Let me ask this, I have two control boxes on here, the first is the scan head, then there is the actual control head that has the volume control on it. The wires you mention are going to the scan head. If I take Pin 4 to the connector #11 on the scan head, the volume goes sky high. Pin # 11 on the scan box goes to pin 21 on the control cable. Also, what is the brown connector used for? That is where the wire comes from pin # 4 is going to.
Mathew ----- Original Message ----- From: "Neil McKie" <[EMAIL PROTECTED]> To: <Repeater-Builder@yahoogroups.com> Sent: Saturday, June 12, 2004 2:14 AM Subject: Re: [Repeater-Builder] Micor 4 Channel Help Needed > > Thank you Mike, > > Neil at 2:14am > > > > Mike WA6ILQ wrote: > > > > Rather than trace everything out, just pop the shell on the > > control cable. > > > > Trace pin 1 and pin 4 up to the head. Pin 1 is ground and is > > hooked to the shield of one or more of the coax conductors in > > the control cable and ends up on pin 21 of the head. Pin 4 is > > frequency 1 and ends up on pin 11 of the head. It is supposed > > to be grounded when the frequency switch is in the #1 position. > > If you have the wrong head for the cable then the frequency > > switch common might not be hooked to pin 1. This is common > > in situations where the installation had a channel scan head and > > the used equipment vendor gives you a standard head. When > > the channel scan board is added the control head frequency > > switch common is rewired and connects through the channel > > scan board and without the board in place the switch common > > isn't grounded. > > > > So just ohm out the F1 wiring and make sure it's hooked up. > > Then make sure that you have good elements in the F1 position. > > Depending on the history of the radio you very easily could have > > the wrong elements for where the radio is tuned. > > > > I once picked up a high-range (42-50mhz) low band Micor that > > had been a Red Cross radio - tuned to 47mhz. The radio had > > mid-range (36-42mhz) elements in it on some fire dept frequency. > > The vendor had grabbed a radio, a random head from a bin, a > > random cable, a random speaker, a random microphone. As > > long as they plugged together he assumed they were compatible. > > They weren't. > > As it turned out, I had a cable that had been pinned for a head > > configuration that had a 8 freq clamshell on the bottom with a > > systems 90 box above it. The box had a multiple PL encoder > > board and a channel-scan board in it. The radio came with a > > 12freq clamshell, the fancy cable, a Mitrek speaker and a bad > > microphone. > > > > It took a while with the Micor mobile book to figure things out. > > > > By the way, > > P901 is the control connector - the front of the radio. > > P902 is the connector between the center of the radio with > > the exciter. > > P903 is the connector between the center of the radio with > > the audio-squelch board. > > P904 is the connector between the center of the radio with > > the receiver. > > > > Mike WA6ILQ > > > > At 11:38 PM 6/11/04 -0700, you wrote: > > > > >Ok, I think I'm getting the picture, it the P-902 the power connector in the > > >fron of the radio. On one of them there is a wire that comes from the board > > >by the transmit xtals that goes to the front of the radio, and is connected > > >to ground. > > > > > >Mathew > > > > > >----- Original Message ----- > > >From: "Neil McKie" <[EMAIL PROTECTED]> > > >To: <Repeater-Builder@yahoogroups.com> > > >Sent: Friday, June 11, 2004 9:17 PM > > >Subject: Re: [Repeater-Builder] Micor 4 Channel Help Needed > > > > > > > > > > > > > > Nope, nope, nope ... > > > > > > > > Exciter: frequency 1 select wire from the Channel Element on the > > > > circuit board goes to P-902, pin 15. > > > > > > > > Receiver: frequency 1 select wire from the Channel Element on the > > > > circuit board goes to P-904, pin 2. > > > > > > > > Those specific pin numbers must be grounded for the receiver or > > > > exciter to operate properly. The usual policy was to ground the > > > > frequency 1 select on the center board (Control Board) at the > > > > factory on all one frequency radios prior to shipment. > > > > > > > > Neil > > > > > > > > > > > > Mathew Quaife wrote: > > > > > > > > > > If I understand what you are asking, pin one of each board is ground on > > > > > here. There is a ground wire on the power connector that is connected > > >to > > > > > ground. Is this what you are referring to. > > > > > > > > > > Mathew > > > > > > > > > > ----- Original Message ----- > > > > > From: "Neil McKie" <[EMAIL PROTECTED]> > > > > > To: <Repeater-Builder@yahoogroups.com> > > > > > Sent: Friday, June 11, 2004 8:16 PM > > > > > Subject: Re: [Repeater-Builder] Micor 4 Channel Help Needed > > > > > > > > > > > > > > > > > You may want to determine if the Channel Element frequency select > > > > > > wire (one of the pins on the bottom) is properly grounded. > > > > > > > > > > > > Look at the bottom of the circuit board immediately below the > > > > > > Channel Element and locate the one connection that goes to the edge > > > > > > connector P-902 on the Exciter and P-904 on the Receiver. > > > > > > > > > > > > See that the one wire is grounded. > > > > > > > > > > > > Neil > > > > > > > > > > > > Mathew Quaife wrote: > > > > > > > > > > > > > > Xtal cases seem to be intact, was told they xtals were still in > > > > > > > there. Even so, I get no power output, and it does not even > > > > > > > register a frequency on my freq counter. So no output, and no > > > > > > > input. There is one extra plug at the control head, and a purple > > > > > > > wire with a connector on it. > > > > > > > > > > > > > > Mathew > > > > > > > > > > > > > > ----- Original Message ----- > > > > > > > From: "N9WYS" <[EMAIL PROTECTED]> > > > > > > > To: <Repeater-Builder@yahoogroups.com> > > > > > > > Sent: Friday, June 11, 2004 5:02 PM > > > > > > > Subject: RE: [Repeater-Builder] Micor 4 Channel Help Needed > > > > > > > > > > > > > > > I have seen where elements are sent out for re-crystalling > > >(different > > > > > > > > freq) and come back with a stick-on label showing the new freq. > > >Maybe > > > > > > > > the labels came off, revealing a freq that is no longer in the > > > > > element? > > > > > > > > (I've actually had this happen to me before.) > > > > > > > > > > > > > > > > Mark - N9WYS > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > From: Neil McKie [mailto:[EMAIL PROTECTED] > > > > > > > > Sent: Friday, June 11, 2004 2:30 PM > > > > > > > > To: Repeater-Builder@yahoogroups.com > > > > > > > > Subject: Re: [Repeater-Builder] Micor 4 Channel Help Needed > > > > > > > > > > > > > > > > > > > > > > > > Perhaps ... > > > > > > > > > > > > > > > > 1) the Channel Elements are on a frequency that the radio is not > > > > > > > > tuned to or ... > > > > > > > > > > > > > > > > 2) there are no crystals in those Channel Elements ... > > > > > > > > > > > > > > > > 3) the ground return for the Channel Elements selector switch in > > > > > > > > the control head is not connected to ground - anywhere. > > > > > > > > > > > > > > > > Neil > > > > > > > > > > > > > > > > > > > > > > > > Mathew Quaife wrote: > > > > > > > > > > > > > > > > > > Yes, they are in the 163 Mhz range. When I press the mic button > > > > > > > > > the radio keys up, just no power output. > > > > > > > > > > > > > > > > > > Mathew > > > > > > > > > > > > > > > > > > ----- Original Message ----- > > > > > > > > > From: "Neil McKie" <[EMAIL PROTECTED]> > > > > > > > > > To: <Repeater-Builder@yahoogroups.com> > > > > > > > > > Sent: Friday, June 11, 2004 10:44 AM > > > > > > > > > Subject: Re: [Repeater-Builder] Micor 4 Channel Help Needed > > > > > > > > > > > > > > > > > > > > > > > > > > > > > Are there any Channel Elements in it? > > > > > > > > > > > > > > > > > > > > Neil > > > > > > > > > > > > > > > > > > > > w9mwq wrote: > > > > > > > > > > > > > > > > > > > > > > I just got a 4 channel micor radio, T73RTN3180B radio, > > >actually > > > > > > > > two > > > > > > > > > > > radio's and one set on control heads. The radio comes on, > > >has > > > > > > > > good > > > > > > > > > > > volume, and squelch works, but there is no receiver > > >sensitivity, > > > > > > > > nor > > > > > > > > > > > power ouput. Both radios do the exact same thing. I'm > > >thinking > > > > > > > > > > > control head, but everything seems to be hooked up. > > > > > > > > > > > > > > > > > > > > > > Mathew > > > > > > 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/
