Before cutting any traces, perhaps it would be a good idea to identify which backplane Mark has. If the jumpers are numbered differently than on the common TLN5644A backplane, it's probably wired quite differently. Since Mark described his repeater as being cobbled together from different machines, there may be some incompatibilities to consider. The Micor C&A manual 6881025E60 assumes that the TLN5644A backplane is installed.
73, Eric Lemmon WB6FLY -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of ac6vj Sent: Sunday, July 27, 2008 12:43 PM To: [email protected] Subject: [Repeater-Builder] Re: UHF MICOR Unified Chassis Hi Mark: Pull the exciter board out and measure the resistance between pins one and five on the transmitter interconnect board. There should be infinite resistance between the two pins. If there is continuity between pins one and five on the transmitter interconnect board, cut the trace on the exciter board leading to pin five P902, see note 409 on the Exciter/1ST Bandpass Filter schematic pullout in the Micor Base and Repeater Station Manual 68P81025E60. Gregory AC6VJ --- In [email protected] <mailto:Repeater-Builder%40yahoogroups.com> , "n9wys" <[EMAIL PROTECTED]> wrote: > > OK gang, I'm working on another project and have run into a wall. > > I have a UHF MICOR Unified chassis station that I am reassembling with the > thought of putting it on GMRS once finished. Yes, this station was TOTALLY > disassembled and scattered to the four winds - chassis, PA and some cards > came from one place, more cards from another, yet more cards from yet > another place, power supply and cabinet from yet another... I have the > station reassembled to the point where it is operating in that it repeats > (keys up on receipt of signal and PL) but it does not pass audio. And yes, > I am resurrecting it on the freqs it was originally tuned before I make any > changes. Right now it's on 462.0000/467.0000 and has one 4-User Control > Module (PL decode) card in the chassis. No PL on TX yet... The station has > the following cards in the chassis (listed from right to left): > > Line Driver > Station Control Module > Squelch Gate > Time Out Timer > Master Decoder > 4-User Control Module Card > > Am I missing any other cards? > > I know these stations have jumpers all over the place - backplane, cards, > etc. - that all needed to be configured properly for the thing to work the > way it should. I have the manuals, but I am stumped. I know I'm missing > something, SOMEWHERE - my problem is: WHAT and WHERE? > > Besides, the manual's diagram for the backplane shows jumpers numbered in a > certain sequence and the backplane I have has them numbered differently - > they're in the same locations, but numbered differently. (For example JU1 > and JU3 are opposite when the manual is compared to the one I have in the > shack.) I've also gone to the Repeater-Builder web site, but those pages > seem to refer more to the conversion of the station or cards rather than > making it work "as designed." Maybe once I get it going, then I can think > about conversion of the cards that Kevin referenced... > > Anyway - as far as the backplane goes, I think all jumpers except for JU5 > should be OUT. Am I correct? (I currently do not plan on any remote > control of the station, but later down the road maybe tone remote > operation...) And what about the Line Driver, Squelch Gate and/or Station > Control Module cards jumpers? > > Any ideas? (Kevin, you're the MICOR guru...) > > Thanks, > Mark - N9WYS >
