Neil, You have to realize, once you got one of the expensive burnishing tools it meant you were accepted as a Tech!
Paul -----Original Message----- From: Neil McKie [mailto:[EMAIL PROTECTED] Sent: Monday, December 01, 2003 7:09 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Re: [[Repeater-Builder] Re: GE Stuff.....]] Must be a later model ... Neil Paul Finch wrote: > > Huh, my burnishing tool is from the 70's! > > -----Original Message----- > From: Neil McKie [mailto:[EMAIL PROTECTED] > Sent: Monday, December 01, 2003 5:10 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Re: [[Repeater-Builder] Re: GE Stuff.....]] > > I had two problems with the base & repeater station Mastr Pro power > supplies: ( EP38 Series ) > > 1) the electrolytic capacitors which had to be replaced every 20 > years or so. > > 2) the cooling fan motor - which needed to be lubricated from > time to time. > > Didn't hurt to burnish the relay contacts from time to time too. > > I still have the burnishing tool from the sixties. > > As many of you personally know, there are two variations of the UHF > Mastr Pro transmitters: > > The early version has a 7377 (tube) tripler/driver stage. Tuning > was a severe pain as some will remember. > Model numbers included: ET-59B and ET-60B > > The late version has the Varactor Diode tripler stage. Tuning was > quite simple in comparison. > Model numbers included: ET-59C, D and F; and ET-60C, D > > You might note, John Mackey. KS0F, has written an excellent paper > on the proper care of the UHF Mastr Pro Transmitter. > > My first repeater was a GE (early) Progress Line - the series that > used the 2C39 as a driver and another as the final. The repeater > came in various output power ratings. 20 watts for the lower power > to 60 or 90 watts for the higher power units. > > Another repeater used the Motorola T44A6, T44A6A and T44AAV receiver > and transmitter strips. (Yes Mike, I have the manuals for those > radios of yours here.) > > Neil McKie > > Paul Finch wrote: > > > > John, > > > > Your correct, the Master Pro was a very good radio, in the shop that > > I worked at we did the service for a freight delivery fleet of over > > 200 Master Pro's. The only part that I did not like was in the UHF > > transmitter where it had a varactor diode tripler. It could and from > > time to time did cause serious harmonics and or transmit noise. GE > > fixed that problem with the Master II. The only other problem I know > > of was with the mobile power supply, the rectifier diodes were poor > > quality and they would go bad, we got to where we would just replace > > all of the high voltage diodes with M-2.5 Mallory replacements. > > > > My second repeater was a UHF Master Pro, I removed the 12 volt mobile > > power supply and installed a 110 volt Motorola Compa Station supply > > (with a few modifications). I built a 10 and 12 volt regulated power > > supply and used the repeater controller I had built for my first > > repeater. By the way, my first repeater was built out of a T-44 with > > a AC power supply. The GE Master Pro repeater worked for years. Sort > > of takes you back don't it! > > > > Also, your very correct about the GE TPL radios, they stunk! > > > > Paul > > > > -----Original Message----- > > From: JOHN MACKEY [mailto:[EMAIL PROTECTED] > > Sent: Monday, December 01, 2003 11:20 AM > > To: Repeater-Builder@yahoogroups.com > > Subject: Re: [Re: [[Repeater-Builder] Re: GE Stuff.....]] > > > > The Mastr Pro was a excellent radio, & still it's spec's are very good > even > > by > > today's standard. I still have SEVERAL of the late model Mastr Pro's in > > service as repeaters on 6 meters, 2 meters, and 440 MHz in Oregon & > > Washington. Their receivers hold up in the most harsh environments. I > have > > no immediate plans of retiring my Mastr Pro repeaters. > > > > (Of course, the Micor is no slouch either - I have those on as repeaters > in > > Iowa) > > > > Neil McKie <[EMAIL PROTECTED]> wrote: > > SNIP > > > the Mastr Pro showed the county shop guys all was not lost. > > > I know, I was impressed. > > SNIP > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > > > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
