Ok , this is for the Power Jfet , as built for now , going to listen
With R5 = 1 M and setting V at the Drain = half the rail , obtained is 1.5 Amps of current through the device , and R-light bulb = 18 ohm .
Thanks
Hi Stefano on schematics T1 is 75Vac....the correct one 36/40 Vac ?
Hello ! can you please link me to the schematic for reference?Hi Stefano on schematics T1 is 75Vac....the correct one 36/40 Vac ?
thanks
OK, tried that, still no joy
Next question. In the schematic in post 715, is the TAB of the IXYS shown by the solid line to the left of the 3 borken lines?
Hope this helps , the metal part in the back of the Transistor is connected to the Drain pin .
Attachments
Hope this helps , the metal part in the back of the Transistor is connected to the Drain pin .
Yes, that's what I thought. Thanks for the confirmation. So, I appear to have it wired correctly.
I am getting 82v to the bulb, but it doesn't light and the safety bulb mains lead glows brightly when I insert the bulb, suggesting a fault. Everything is ok until I fit the bulb. Bulbs are 300W - 130v.
the safety bulb mains lead glows brightly when I insert the bulb
what is that ?
what is that ?
A 60W bulb in the live mains feed.
Are these any good?
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
The metal cased 1 ohm resistor is not wired up at present the PS is a CRC with some wirewound resistors. I was going to use these if the others got too hot.
OK , what is there for R4 ? I am using 30w metalfilm on heatsink
R4 is the wirewound resistor on the amp board with IXYS.
that is probably too small in power to be working well , or at all . Check it , it may be broken
OK. What does rating does Nelson suggest?
Can't remember right now , the circuit will need 10W min.
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