http://www.4qdtec.com/mircl.html
http://www.rlocman.com.ru/am/a01004.htm
http://www.electronicsforu.com/electronicsforu/lab/ad.asp?url=/efylinux/circuit/jul2000/cir2.htm&title=
Small system or Receiver Backup Power.
http://www.uoguelph.ca/~antoon/gadgets/rxback.htm
A design guide for a low cost transformerless power supply that will provide a regulated voltage at low current levels directly from the CATV cable line.
http://members.tripod.com/michaelgellis/capsup.html
NiCad Battery Cycler for RX & TX.
http://www.uoguelph.ca/~antoon/gadgets/cycler.htm
circuit which will discharge the high voltage power supply filter capacitors and main energy storage capacitors and show when they are safely discharged
http://members.misty.com/don/samflash.html
http://www.shaka.com/~kalepa/desulf.htm