Mike, Your comments and help is very much appreciated. You have gone to an effort to help me greatly and I extend my thanks to you. Great details!
The TPN number is TPN2264 SP01 It has been mentioned to me that the SP could mean either special product or special price. I haven't actually powered it up yet but will do so shortly and check output voltages. My reason for asking about this supply is that well ... I have it and could sure use it if it proves to be suitable for my application - powering dc devices and a couple of UHF repeaters in my mobile home when plugged into grid power (the charging circuits would be a bonus for keeping the batteries topped up - but as has been mentioned already it would probably not be good for my AGMs.) I got it for next to nothing so saw it as a cost effective solution. My other option is a switch-mode bench supply @ 40amps continuous that I also have. A bit concerned about RFI into radio equipment tho. It is one of the POWERTECH MP3090 models such as this - http://tinyurl.com/y9nl85a The model I have has digital volts and amps meters - so a good way of keeping a tab on current draws. What do list members think of using this supply as an alternative to the Motorola one? I know which is a lot lighter to pick up and move around! Thanks all Graham ZL3TV New Zealand --- In Repeater-Builder@yahoogroups.com, Mike Morris <wa6i...@...> wrote: > > The photo looks like a repeater supply. > > Many repeater supplies provided a 9.6v DC low > current output for the receiver and exciter, some > had a second low current output at 13.5-13.8vDC > at 3-4 amps for the other audio stages, and most > had an unregulated (as high as 16v) high current > output for the transmitter RF amplifier section. > > The 16vDC is not suitable for high current loads > that expect 12-14 volts. You will cook / boil your > batteries. > > The 25-series number is for the power transformer > only. Motorola parts department always formatted > their part numbers with a 2-digit prefix to identify > the type of part. > See <http://www.repeater-builder.com/motorola/numerical-parts-categories.html> > > TB602 is a label for a connector that goes to > somewhere else in the radio cabinet. It probably > has the 9.6 or 12v low current, or ? > Some supplies had a battery charger circuit in > them. Some had a battery backup section (i.e. > an automatic load switchover from the mains > supply to the battery bank. > > Please look for a rubber stamped number somewhere > on the chassis > that starts with TPN, followed by 4 digits > and maybe a suffix with some letters and numbers after > it - something like TPN1095A, or TPN1152B1, or something > in that format. USUALLY, but not always, there is a letter > after the 4 digits, occasionally there is a number after the > letter, and rarely there is a number at the end. > > There is no way to tell exactly what voltages, or features > your supply has in it without seeing the actual physical > supply, or looking at the manual. > If you provide the complete TPN number we can look it > up to see what type of station (radio) it came from, then > look at the manual for that station. > > BTW the TPN comes from: > T = Two way radio product > P = Power supply, or power supply related > N = Not frequency sensitive > . > The last letter usually was structured like this: > A Under 25 MHz > B 25-54 MHz > C 66-88MHz > D 144-174 MHz > E 390-550 MHz > F 890-960 MHz > N Not frequency dependent > See <http://www.repeater-builder.com/motorola/aaannnn-numbering-scheme.html> > > Mike Morris WA6ILQ >
