Home |
Search |
Today's Posts |
#1
|
|||
|
|||
low voltage high current heater supplies
dear all
I am playing with some 813's at the moment. I am trying to get the heater supply sorted out. the 813 needs 10v at 5 amps, the do glow v. bright when lit up. pretty neat. I have a breadboard amp going at the moment which someone else has given me. The current heater supply uses a 20 odd volt ac transformer, bridge rectiifer, feeding a 2n3055 based regulator, thing is putting out about 50watts in heat. as it is stereo there is 100w in heat being generated. whenever i model a 5 amp 10V heater supply in PSUD i get some really whacky readings, ie. 28V transformer to feed 100,000u cap, with a 0.5ohm resistor, then 1000u cap into the tube. ie. 2 ohm load, or am i missing something here, 28V ac seems a long way away from 10v dc, or is this an artifact of the high current pulsing away and charging the caps? I wanted to build a dc supply that does not generate so much heat in itself. any thoughts, ideas etc. especially the printable ones would be greatly appreciated. kind regards bill ramsay. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Topic Police | Pro Audio | |||
Artists cut out the record biz | Pro Audio |