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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: RE: No feedback and UL transformer connection posted by SteveBrown on January 15, 2017 at 07:55:45:
That FB resistor as you call it is just the plate load for the 6AU6. I'd rather select a signal pentode that has a higher plate/g2 current ratio...the 6AU6 is rather poor, though I have had them work very well. Using the power tube's screen tap just sets the ratio of plate signal delivered to the signal tube. Plate to grid FB, and with pentode OPT's it can be done with a voltage divider too...the screen tap is just convenient...:) The type EL84 turns out to be a very fine signal pentode.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
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Follow Ups
- RE: No feedback and UL transformer connection - PakProtector 12:53:09 01/15/17 (1)
- RE: No feedback and UL transformer connection - Eli Duttman 14:45:43 01/15/17 (0)
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