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Topic: 1936 Dobro Cast Aluminum Steel |
Mark Gough
From:
Sault Ste. Marie Ontario
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Posted 16 Jun 2022 8:42 am |
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I’m restoring this 1936 Dobro cast aluminum. The magnet and pickup are fine. I need to replace the pots and capacitor and I don’t see any identification numbers on them. Does anyone have information for period correct values for the pots and capacitor?
Many thanks in advance.
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Noah Miller
From:
Rocky Hill, CT
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Posted 16 Jun 2022 10:47 am
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My '36 National has a 250K tone pot and a .05 mfd cap. The volume pot is a modern replacement but was probably the same as the tone pot.
That said, National-Dobro's shop motto might have been "eh... whatever works". They'd use anything they had on hand, and I wouldn't be surprised at all if other people come up with different values.
If I were replacing the pots in these, I'd go with 500K to maximize output and treble. I'd probably also go with a much smaller cap, maybe .010. These things are pretty warm sounding as originally wired. |
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Mark Gough
From:
Sault Ste. Marie Ontario
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Posted 16 Jun 2022 11:13 am
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Noah, thanks for the info. Helps me out considerably!
Are your pots linear or audio?
All the best. |
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Noah Miller
From:
Rocky Hill, CT
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Posted 16 Jun 2022 11:50 am
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| The pot isn't marked, but I'm guessing it's audio taper. Even if it's not, I would not go with linear even for the sake of historical correctness. If you're going to have non-original components, you might as well get the best sound and functionality out of them! |
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Allan Revich
From:
Victoria, BC
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Posted 30 Jun 2022 10:16 am
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| Don’t forget to post pix! |
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