Re: [Repeater-Builder] RCA power supply ID?
On Sunday 17 July 2005 02:27 pm, Neil McKie wrote: More - found it !!! Indeed you did !! Thanks Neil, I appreciate it. I thought this was going to be tough to identify from the limited info I had, but you nailed it. That tells me what I need to know for now. Is there an easily copyable schematic? Might be nice to have in case it ever breaks. It's a very simple supply, but ya gotta love that RCA wiring color code... g Paul 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/
Re: [Repeater-Builder] RCA power supply ID?
A photocopy should run about $2.00 overall. I will need your snail mail address however ... Neil Paul Kelley wrote: On Sunday 17 July 2005 02:27 pm, Neil McKie wrote: More - found it !!! Indeed you did !! Thanks Neil, I appreciate it. I thought this was going to be tough to identify from the limited info I had, but you nailed it. That tells me what I need to know for now. Is there an easily copyable schematic? Might be nice to have in case it ever breaks. It's a very simple supply, but ya gotta love that RCA wiring color code... g Paul 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/
[Repeater-Builder] RCA power supply ID?
And here's a REAL long shot I'm trying to find any info on this power supply, believed to be from a RCA ~100 watt VHF base or repeater. The only markings are: 3720788-501 CODE B. I don't have a picture so will try to describe it. Open frame, rack mount, 7 height. One big transformer, two chokes, 4 large filter caps and switch/circuit breaker on the front... large heatsink for the rectifier diodes, smaller one for the regulator pass transistor(?), regulator board etc. on the back. Seems to have an adjustable regulated ~13.8V output and a high current unregulated (ferro-resonant) output for a PA... I'm guessing good for at least 20 amps. Also perhaps a terminal for connection of a battery?? (seems to hook back into the unregulated output through a big diode). Anybody got the slightest clue about this beast? I'd like to know the current ratings and possibly find a schematic. Paul, N1BUG 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/
Re: [Repeater-Builder] RCA power supply ID?
Hello Paul, Your inclusion of the 3720788-501 number should help. I'll go look in a few minutes. Neil - WA5KLA Paul Kelley wrote: And here's a REAL long shot I'm trying to find any info on this power supply, believed to be from a RCA ~100 watt VHF base or repeater. The only markings are: 3720788-501 CODE B. I don't have a picture so will try to describe it. Open frame, rack mount, 7 height. One big transformer, two chokes, 4 large filter caps and switch/circuit breaker on the front... large heatsink for the rectifier diodes, smaller one for the regulator pass transistor(?), regulator board etc. on the back. Seems to have an adjustable regulated ~13.8V output and a high current unregulated (ferro-resonant) output for a PA... I'm guessing good for at least 20 amps. Also perhaps a terminal for connection of a battery?? (seems to hook back into the unregulated output through a big diode). Anybody got the slightest clue about this beast? I'd like to know the current ratings and possibly find a schematic. Paul, N1BUG 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/
Re: [Repeater-Builder] RCA power supply ID?
More - found it !!! 3720788-501 CODE B is the RCA drawing number. Is the circuit board on the RCA Series 1000, Base Station Power Supply - apparent model number MI-559472, Instruction Book IB-8027297 The Technical Data block: Equipment Designation MI-599472 Power Supply Panel AC Voltage 109, 121, 133 V AC (tap adjustable) 121 V AC (nominal) 50/60 Hz AC Input Current 0.5 Amperes (no load) 6 Amperes (full load) Unregulated DC Output 13.0 V DC (full load) ... note current is not given ... 18.0 V DC (no load) Regulated DC Output 13.8 V DC +/- 2% regulation for +/- 10% line voltage variation Current Overload Protection Transformer Primary - 9 Amp Circuit Breaker Regulated +13.8V - 5 Amp Fuse ... In the text, is the following ... . a high current transmitter power supply (+12.8 V @ 22A) . The manual and addendum are 10 pages long in case you are interested ... The MI-559472 Series 1000 Base Station Power Supply is used for the following: UseFreq band Tx Power *Manual number Integral Local Control 50 MHz100 Watts IB-8027307 Integral Local control 150 MHz 30/60 Watts IB-8027308 Remote Control 50 MHz100 watts IB-8027310 Remote Control 150 MHz 30/60 watts IB-8027311 Repeater/Relay Control 50 MHz100 Watts IB-8027312 Repeater/Relay Control 150 MHz 30/60 Watts IB-8027313 Radio Link Control 50 MHz100 Watts IB-8027314 Radio Link Control 150 MHz 30/30 Watts IB-8027315 Plus others not listed here ... *Refers to a note that says 'System Index' 'This IB number identifies this sheet only. When ordering or re-ordering books, use each individual IB Number.' The System Index lists all of the specific chassis used in the station and the appropriate IB Number. Hope this helps, Neil - WA6KLA Neil McKie wrote: Hello Paul, Your inclusion of the 3720788-501 number should help. I'll go look in a few minutes. Neil - WA5KLA Paul Kelley wrote: And here's a REAL long shot I'm trying to find any info on this power supply, believed to be from a RCA ~100 watt VHF base or repeater. The only markings are: 3720788-501 CODE B. I don't have a picture so will try to describe it. Open frame, rack mount, 7 height. One big transformer, two chokes, 4 large filter caps and switch/circuit breaker on the front... large heatsink for the rectifier diodes, smaller one for the regulator pass transistor(?), regulator board etc. on the back. Seems to have an adjustable regulated ~13.8V output and a high current unregulated (ferro-resonant) output for a PA... I'm guessing good for at least 20 amps. Also perhaps a terminal for connection of a battery?? (seems to hook back into the unregulated output through a big diode). Anybody got the slightest clue about this beast? I'd like to know the current ratings and possibly find a schematic. Paul, N1BUG 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/
