Dan, Is this one of the Micors that has the PA heatsink sticking out of the upper right corner of the unified chassis??? Some say it is a Mocom PA.
If so I have used one on a high profile repeater for over 12 years. I reduced the power out to 40 watts, all I needed. It is still in service although getting ready to replace with MSR2000. Most of the Micors were made for 150-160 range, some for 160-174, but ones from CANADA and US gov were 140-150. The last is what I have. In the part model number on the cabinet front will tell what band segment. I've done a number of the 150-160 for Ham. I find the exciters and PAs work, but at slightly lower power out...110 W unit puts out 90 W. They did make 45 and 60 watt versions. However, on the receiver I've found the 150-160 do not want to tune down. Motorola made them too good. To correct this I removed the helical and replaced the tuning slugs with regular screws with the head inside. This gives more C and moves them down. Some have added turns to the coils, but a lot of work. The screws are 10-32. Don't know what the skirks look like, but do work. The other problem I had was on many of the base exciters Motorola used a large cap on the Ch Ele for keying...would ground the Ch Ele ground to key. This large cap would take time to charge and the repeater would come up off freq for a few 100 ms. I replaced with a mobile exicter. Most of the unit is same as the mobile so can use mobile manual for tuning. I don't have spare manual, but sure you can find on e-bay or here. They do make excellent repeaters, just takes some work. I installed a SQ gate card which made it a repeater. I used the SQ gate card for COS. It has excellent carrier sense for this. Of course I added my controller to give some bells and farts and ID and control. Got all except PL logic from back plane at the SQ gate card. 73, ron, n9ee/r >From: Dan Cation <[EMAIL PROTECTED]> >Date: 2008/06/18 Wed PM 10:44:51 EDT >To: [email protected] >Subject: [Repeater-Builder] Need help on a Micor repeater > >Hi all - just acquired a Micor Unified Chassis repeater (VHF High >band) and am in the process of checking it out and trying to get tuned >to 2 meters (147.78/18). So far it looks like it has a problem with >the PA and it also does not look like the PA is wanting to tune down >to 2 meters. It is a 100 watt Intermittent Duty PA (yeah, I know - I >should have got the numbers off of it..), Looks like the repeater is >about 1984 vintage from the dates I'm seeing. I have the control >shelf manual but have not been able to find the RF deck manual yet. >Anyone have any Micor schematics? I'll get the numbers off the deck >tomorrow. This PA looks like it is off of some sort of mobile, but >not a Micor (it is the original deck). Only two tuning caps in the >whole deck and they max out before they peak. It was putting out 78 >watts flat out on the 155 TX frequency before I started - I'm betting >one of the 4 finals is dead. Anyone have any experience with >something like this? I haven't started on the the receiver yet. Any >help or guidance on this would be appreciated. Thanks in advance - >Dan WB0SHN. > > > Ron Wright, N9EE 727-376-6575 MICRO COMPUTER CONCEPTS Owner 146.64 repeater Tampa Bay, FL No tone, all are welcome.
