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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: RE: OK . . . So . . . Working Through This . . . posted by mikeyb on August 1, 2007 at 18:48:13:
Ok, following your suggestion, the grids have been dropped to 0v and the difference (180v) between the original grid (120v) and plate (300v) has been roughly maintained by dropping the supply voltage to 300v and keeping the 33k plate resistor. Actually 295v supply would be exact and is the B+ in Pete Millet's schematic.
We now want to have the cathode at 5v (+5v relative to the grid and -175v relative to the plate). Couldn't this be accomplished by simply replacing the 18k resistor with a 720 ohm resistor?
Or am I missing something here?
. . . . Charlie
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Follow Ups
- Why Would a Negative Supply Be Necessary? - FlaCharlie 18:31:42 08/02/07 (1)
- RE: Why Would a Negative Supply Be Necessary? - mikeyb 05:45:02 08/03/07 (0)
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