I think you're probably right. I found a source for the OEM caps at $9 each, but may I'm better off just fabricating some sort of mounting mechanism and using newer style caps.
Rather than using 2 17500uf either side of the chokes and four after the last choke, could I just use one 40,000uf or so either side, and two 40,000 after the last choke? Unless I'm forgetting something, more capacitance can't hurt, no? Eric KE2D --- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> wrote: > > The problem with buying NOS caps is that they might have been new in 1980. They've been sitting on the shelf for all this time, and might not be much better than what you have now (unless yours are shorted). > > Bob M. > ====== > --- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote: > > > From: kk2ed <[EMAIL PROTECTED]> > > Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID > > To: Repeater-Builder@yahoogroups.com > > Date: Friday, September 19, 2008, 12:48 AM > > Thanks for the reply/suggestion. A stud mount of greater > > current > > rating may be the way to go. I could just drill out of the > > existing > > mounting holes and use the stud mount and a nut/washer > > combo. > > > > However, after googling till my eyes fell asleep, I found a > > few > > sources on the web for the original diode - which turns out > > to be a > > 1N3492R. So that takes care of the diodes - > > > > Now, on to the caps. I mistyped last evening, as they are > > 17500uf > > and not 27000uf. Not as much luck, but I did find one > > supplier > > listing NOS Moto numbered caps on their web site. I > > requested > > pricing. Depending on the price, I will either buy them or > > retrofit a > > newer style cap. > > > > Eric > > KE2D > > > > > > > > --- In Repeater-Builder@yahoogroups.com, Captainlance > > <Captainlance@> wrote: > > > > > > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE > > "REVERSE" > > POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I > > HAVE USED > > THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE > > CURRENT > > THAN THE FACTORY ONES DO. > > > LANCE N2HBA > > > ----- Original Message ----- > > > From: kk2ed > > > To: Repeater-Builder@yahoogroups.com > > > Sent: Thursday, September 18, 2008 9:10 AM > > > Subject: [Repeater-Builder] Re: Micor TPN1110A power > > supply parts > > ID > > > > > > > > > The diodes CR1 and CR2 are compression-fitted style > > rectifier > > diodes > > > that are pressed into a rectangle stock of aluminum, > > and the > > aluminum > > > is then secured to the chassis via two screws. The > > diodes have > > one > > > solder lug terminal. > > > > > > The service manual only lists the Motorola part #; > > no specs or > > > industry-standard part # is given. Same on the caps. > > Only spec > > given > > > is 27,000 uf @ 20wvdc. > > > > > > I did a quick search of Mouser and DigiKey, and was > > unable to > > find > > > any chassis-mount style caps. Anyone find something > > suitable that > > can > > > be re-secured to the ps's chassis via new rivets > > or screws? I > > know I > > > can just solder in any cap that meets electrical > > specs, but I > > would > > > like the caps to be secure and not have the ps > > become a fire > > hazard > > > waiting to happen! > > > > > > The power supply was still sitting in my truck last > > night. When I > > get > > > a break today I will take it apart further and see > > if I can find > > a > > > part # stamped on the diodes and caps that might > > indicate what > > the > > > real part # is. While I was at the repeater site > > yesterday I > > thought > > > I saw a 1Nxxxx stamped on the diodes. > > > > > > I would have thought that there would have been > > someone here on > > the > > > list that has repaired one of these supplies before, > > so that is > > why I > > > asked. > > > > > > Eric > > > KE2D >
