About a year and a half ago I replaced the whole board on my VHF MSR2000 110 watt NCD PA. (My PA had more problems than just the transistors) I used the PA board out of a 110 watt mitrek mobile. It took me an afternoon to do it as I recall. I had to remove the power control circuitry and change some values of some resistors on the input side of the mobile PA, but it still works great today with a nice clean output.
MSR2000 PA's are notorius for failing, especially the NCD units. You could not back the power down enough and still maintain a clean output, no matter how much air you blew on and out of the PA. The CD units faired a little better, but those darn ham operators could fry them too! Ha! Ha! Gary KB7TRP --- In [email protected], Neil McKie <[EMAIL PROTECTED]> wrote: > > People have been wondering why I seem to 'collect' all those old > used Motorola and GE radios. I usually 'collect' them at swapmeets > when the sellers can't give them away (except to me.) > > I finally unloaded almost all of the tube gear except one - even > donated a GE MT-16 to a friend in the San Francisco Bay area > sometime back. > > Why not? The manufacturers quit supporting them years ago. > > I have Motorola back to the later Motracs, Mocom-70's, Micors and > Mitreks. > > I have RCA to Series 700. > > I have GE in Mastr-Pro (very nice radio) Exec II and Mastr II. > > Those here who have seen my garage will ... groan ... > > Get down to your local ham swapmeet and start catching up. Of > course, you'll raise the price to me ... but the parts will be used > by someone and not hit the scrap yard. > > Neil - WA6KLA > > > skipp025 wrote: > > > > Do what most of us are doing, buy used Motorola > > radios of the same era/type and lift the transistors > > from surplus radios. > > > > I purchased 40 used mitrek 110 watt radios for > > replacement UHF MSR PA Modules. Although the > > remove and replace process takes some 3 plus > > hours of serious work, the much lower cost > > offsets the financial pain. > > > > The same would apply with with the VHF pa, which > > also depends on whick of the 3 or 4 known VHF > > PA versions you have. > > > > Ebay and the surplus radio dealers are good part > > sources. > > > > cheers, > > skipp > > skipp025 at yahoo.com > > www.radiowrench.com/sonic > > > > > > Anyone know where I can find MSR2000 finals? > > > > I have a high band VHF MSR2000 with 2 blown > > > > finals (one set), and would like to replace > > > > all 4 if I can find a set of replacement transistors.... > > > > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
