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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: Here is schematic for 26 I'm building. posted by JANDG on May 8, 2007 at 20:22:11:
Hi!nice simple design. What is the input level you expect the 26's grid will see ? Nominal CD level would drive the grid positive already.
If you stick with this op point, may I suggest to give 'filament bias' a try ? Connect the filament supply to one filament pin and the other filament pin to ground through a 1.5 Ohm resistor. This will give you the same grid bias without the need to resort to a battery. However in this arrangement the filament supply must be very quiet. I'd recommend a cutrrent source, or better yet a choke. Make it LCL, if you have the iron available.
Best regars
Thomas
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- Re: Here is schematic for 26 I'm building. - Thomas Mayer 02:32:17 05/09/07 (0)
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