Motorola Alert Monitor (early 1970's)

SGSuit · Post by **SGSuit** » Wed Jan 11, 2006 7:14 pm

I am looking for any service manuals, schematics or that type of information for Motorola Alert Monitors from the early 1970's. My fire department is currently in possesion of about 25 of them and only 10 work correctly. All still receive though some poorly, some of them don't "trip" when the tones are transmitted and some the squelch doesn't adjust correctly. We would like to fix them if possible but we can't get anyone to touch them. I have worked as a technition/troubleshooter am am willing to try these but it is hard to work on sonething you have no specs for. They are all model L01CND7100A and are for 46.060 MHZ. If anyone can help me out it would be greatly appreciated.

jcobb · Post by **jcobb** » Wed Jan 11, 2006 9:26 pm

I have several manuals (some place) for Alert Monitors. I seem to recall a lo-band one. If I can find it, I will loan it to you.

Jack

SGSuit · Post by **SGSuit** » Wed Jan 11, 2006 11:18 pm

That would be Great!!! Whatever it takes...If you find one let me know I'd be more than happy to pay for shipping and through something your way to let me borrow it.

Steve

jcobb · Post by **jcobb** » Thu Jan 12, 2006 1:21 pm

Pretty sure I know I have one. Do you have a service monitor or some method for injecting an on-frequency signal at varying levels? You can tune with a VTVM, but need an on-frequency signal to do so.

Of course, you also would want some way to send the 'tones' too.

Jack

SGSuit · Post by **SGSuit** » Thu Jan 12, 2006 7:47 pm

Yeah I have a signal generator and can get my hands on a tone generator