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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: A 6Y6GT/6922 P-P Amp with MOSFET Concertina Splitter posted by jyourison on March 28, 2015 at 10:32:15:
Here is another Edcor option. It runs about $53 USD. I has a 300 mA secondary, which is overkill for this amp, but if you were to bias "hotter" you'd need the extra capacity. The 180V output means you can use the 6.3V 6A winding for the heaters. I added a 0.05 - 0.1 Ohm resistor to nudge the heater voltage to sit right at 6.3V or a little under.
When my mains voltage went high one week, I added a couple of 10 Ohm WW 25 Watt resistors to the 180V secondary to create a slight drop. This not really needed, unless you're a perfectionist. The amp is fine pls or minus several volts of resultant B+.
A note on the power supply capacitors: these were in the bin. Feel free to use lower values. I would feel comfortable using 330 muF. The inrush current limiter was a suggestion from Eli, knowing I had these large ones (actually, even larger ones) on hand.
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- 6Y6GT/6922 Power Supply Option 2 - jyourison 03/28/1511:09:41 03/28/15 (0)
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