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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: Love these 10 turn pots! posted by zekk on August 13, 2015 at 16:20:30:
Here's a link to some 100 ohms 10 turn pots.
The pot will draw 75ma. of filament current so be sure the supply can handle it.
The larger value pot will draw less filament current but leave you with more un-bypassed cathode resistance. (that will cause some local current feedback that you might not want)
On a 2a3 (2.5 volts filament) I would use a 50 ohm pot. Because the voltage is lower the 50 ohm pot only draws 50ma.
I use 100 ohms on my 300b. 5 volts across 100 ohms is 50ma.
A 100 ohm pot adjusted to the middle gives 25 ohms of un-bypassed cathode resistance.
Tre'
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Follow Ups
- RE: Love these 10 turn pots! - Tre' 20:47:05 08/13/15 (8)
- Quality? - dee eye why 17:13:07 08/14/15 (3)
- RE: Quality? - Garg0yle 18:16:51 08/14/15 (2)
- RE: Quality? - Tre' 18:55:58 08/14/15 (1)
- RE: Quality? - Garg0yle 19:01:23 08/14/15 (0)
- RE: Love these 10 turn pots! - vinnie2 14:25:23 08/14/15 (0)
- RE: Love these 10 turn pots! - thermionic addictions 11:58:02 08/14/15 (1)
- RE: Love these 10 turn pots! - Tre' 12:10:46 08/14/15 (0)
- RE: Love these 10 turn pots! - vinnie2 04:59:33 08/14/15 (0)
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