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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: Filament supply with no center tap posted by banpuku on February 22, 2017 at 13:17:28:
How is your 2A3 biased? If you are determined not to use a pot and your 2.5 vac winding has no CT then you need to make one using a pair of 50 to 100 ohm resistors. These need to be fairly closely matched and 3 to 5 watt ones should be sufficient. In turn this CT needs to be connected to a cathode resistor. If you don't use a resistor to bias the output tube you will likely destroy it in short order since you are not restricting the floe of current through it.
You should use a capacitor to bypass the cathode resistor unless you like listening to music without any bass.
You should have a separate winding for each tube. Good luck!
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Follow Ups
- RE: Filament supply with no center tap - vetmedrobert@gmail.com 14:42:12 02/22/17 (0)
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