Ross,
Looks like a standard PA on the GE MSTRII. The other board looks like a audio filter or audio generator. These are used when the receiver is attached to a voter. It produces the 1950 Hz tone when the receiver is not receiving a valid signal and goes away when a valid signal is received. I hope this helps. Charles Miller WD5EEH, Dallas, TX From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Ross Johnson Sent: Thursday, July 22, 2010 7:03 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Strange VHF PA with power resistor setup problem Hello Group, Hey have any of you seen one of these PA's with the power resistors over inductors? Came out of a VHF repeater with a IDA control shelf. The problem with the PA is intermittent power output. Runs 10watts or 100watts depending on if you just smacked it or not. I saw it arc above the second driver after a smack when it came up to 100 watts where it looks like there is a lack of solder. I was going to poke around literally with a insulated tuning tool but I thought I'd ask first. Also, the other picture attached. I've seen these tone boards before but what do they do? Haven't found any documentation on one yet. Even on RB Thanks for reading! Ross www.kc7rjk.net <http://www.kc7rjk.net/> Your message is ready to be sent with the following file or link attachments: MastrPA1 Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your e-mail security settings to determine how attachments are handled.
