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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: 30 filament and AC posted by arnoldc on January 24, 2007 at 00:05:30:
'I would use an LM317 as current regulator to supply the 60mA the filament needs.'YUCK ! Don't do it like this , LM317 is a horrible sounding thing , only good for heaters not filaments . I would recommend what nature intended : a 2V lead acid battery (look up 'Cyclon') . Alternatively current drain is so low that a stack of 2 rechargeable AA cells and a series resistor would also be ideal way of lighting these up
cheers
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Follow Ups
- Don't use an LM317 anywhere near the signal path ! - fatbottle 05:42:11 01/24/07 (11)
- Is that the reason why... - arnoldc 16:36:53 01/25/07 (2)
- Re: Is that the reason why... - fatbottle 22:57:38 01/25/07 (1)
- Re: Is that the reason why... - arnoldc 21:22:15 01/26/07 (0)
- Re: Don't use an LM317 anywhere near the signal path ! - Russ57 06:16:26 01/24/07 (7)
- Re: Don't use an LM317 anywhere near the signal path ! - fatbottle 07:06:43 01/24/07 (6)
- Some of the "air core" inductors made for speaker ... - thermionic addictions 13:27:20 01/24/07 (3)
- no good ! - fatbottle 13:44:34 01/24/07 (2)
- That might be no good, too! - Triode_Kingdom 11:04:01 01/26/07 (1)
- Re: That might be no good, too! - fatbottle 12:23:01 01/26/07 (0)
- I use a Ronan Reg type current source - andy evans 11:25:12 01/24/07 (1)
- Re: I use a Ronan Reg type current source - fatbottle 23:32:54 01/24/07 (0)
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