Thanks Ron for the input. I will look for a used mobile UHF Micor. The ironic thing is that I work for Freescale Semiconductor, we used to be Motorola. I have been there 22 years. I most likely helped build the IC I need. Bill
----- Original Message Follows ----- From: Ron Wright <[EMAIL PROTECTED]> To: [email protected] Subject: Re: [Repeater-Builder] Micor UHF RX IC needed M6707 Date: Sun, 02 Sep 2007 06:55:02 -0500 (CDT) > Bill, > > The UHF Micor receivers are pretty much standard in all > Micor radios. Probably cheapest and best place to look is > for a mobile which can be had on e-bay for $10 plus $100 > shipping. The receiver is a simple remove (it unplugs), > insert in your repeater and tune. > > If you could talk the e-bay seller into removing the > receiver and shipping it only he might reduce the shipping > to $90 (shipping $10, handling $80). > > I am not sure if you are using a mobile converted to a > repeater or a full real live Micor repeater. In the live > one the TXs are radically different so the mobile TX parts > will not do you much good unless you would like to go thru > the pain of removing a PA, hi. > > 73, ron, n9ee/r > > > > >From: William Delbert Ellis <[EMAIL PROTECTED]> > >Date: 2007/09/01 Sat AM 10:14:59 CDT > >To: [email protected] > >Subject: [Repeater-Builder] Micor UHF RX IC needed M6707 > > > > >Howdy fellow repeater builders. > >My Micor UHF ham band repeater has gone deaf. > >Basic troubleshooting reveals no discriminator output > >When I hang a scope on the input to the 2nd IF amplifier > everything >looks great. I can key up my FT-817 on the > machine's input frequency >and see a nice signal with > deviation as I talk. Switching to another >repeater > frequency on the FT-817 I get nothing so I'm sure the > >Channel element, mixer all the doubler circuits and all > the other IF >stages and crystal filter stages are ok. > The output of U102 the 2nd >IF Amplifer M6707 IC has > nothing. I pulled one end of C192 the end >that goes to > L137 from the output of the AMP. This is easy because > >it's mounted dead bug on the back of the PCB. Still no > output from >the AMP. I did this to make sure no other > circuitry down the line >was holding down the output of > the AMP. So I think the four diodes >in the discriminator > are OK. When the machine is cold and been >powered down > for 30 minutes or so the amp seems to work for about 5- >8 > seconds when first powered up then shuts down so I'm > pretty sure >this IC is bad. > >The questions are: > >A. Is this a common problem? > >B. Where can I find a replacement? > >C. Is there a new device that can be used in it's place? > It's in a 9 >pin round package. > >D. Shoud I look for an old mobile UHF Micor and remove > the part? >Thank You group and have a nice Labor Day > weekend. >Bill N5ZTW > > > > > > > Ron Wright, N9EE > 727-376-6575 > MICRO COMPUTER CONCEPTS > Owner 146.64 repeater Tampa Bay, FL > No tone, all are welcome. > > >
