16-10-2015, 11:21 AM
Hi alan , the transformer you suggested on ebay would give 270v dc and the 6.3 ac heater volts , ive
been given a rectifier 25a 1000v so I could by another lots on ebay , it looks like the neg voltage to
pin 2 is supposed to be set at 12.5 volts but if I were to buy another small transformer say 20v and
put it through a adjustment pot I could vary the voltage and I think do a maths calculation to get
transconductance , or have I lost the plot , does pin 3 go to earth in your drawing cheers phil.
been given a rectifier 25a 1000v so I could by another lots on ebay , it looks like the neg voltage to
pin 2 is supposed to be set at 12.5 volts but if I were to buy another small transformer say 20v and
put it through a adjustment pot I could vary the voltage and I think do a maths calculation to get
transconductance , or have I lost the plot , does pin 3 go to earth in your drawing cheers phil.
