Hi Bob,
There’s a schematic of the Audio/Squelch board on Batlabs, here... HYPERLINK "http://www.batlabs.com/maratrac.html"http://www.batlabs.com/maratrac.html Look about a third of the way down the page. There’s also some info there regarding the head-mount squelch control. Might be all you need. Good luck! Brian W. Poellnitz [EMAIL PROTECTED] -------------------------------- Never meddle in the affairs of dragons... for you are crunchy and good with ketchup. -----Original Message----- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Bob M. Sent: Sunday, February 03, 2008 7:36 PM To: repeater-builder@yahoogroups.com Subject: [Repeater-Builder] Low-band MaraTrac Squelch Pots I'm working on a 42-50 MHz MaraTrac with the A7 advanced head that has a squelch pot on it. The squelch is open all the time, and neither the control head pot or the pot inside the radio will close the squelch. The radio does go quiet if I program TPL/DPL on the channel and ground the mike hang-up button. The service manual I was able to look at didn't have anything about this remote squelch pot in it. Does anyone have a MaraTrac manual that HAS the squelch pot details in the control head? I'd need info about the wiring inside the radio. I was able to trace one side of the pot to pin 9 of the radio end of the control cable, and I can see a varying resistance value there (to ground) when I rotate the pot. From that point on it's a mystery. I suspect a problem on the audio interface board. I don't know if this particular control head and cable belongs with this radio. I will pay for copies of the appropriate sheets. Please let me know privately if you can help. Thanks. Bob M. ____________-_________-_________-_________-_________-_________-_ Never miss a thing. Make Yahoo your home page. HYPERLINK "http://www.yahoo.com/r/hs"http://www.yahoo.-com/r/hs No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.19/1256 - Release Date: 2/2/2008 1:50 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.19.19/1256 - Release Date: 2/2/2008 1:50 PM
