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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: Choke for Music Reference RM-9 posted by audioeyedoc on April 7, 2021 at 13:41:38:
The amp projects I'm starting now are all doublers. I'll be using a Hammond 155T after the doubler caps, then a reservoir cap. The choke is rated 0.5H, 300 mA, 30 ohm. This might not seem like much inductance, but it significantly reduces ripple and presumably noise. The second cap doesn't need to be too large. The doubler caps each pass 60 Hz current, but the reservoir cap is operating at 120 Hz. Also, because the doubler caps are in series, the load only sees half the capacitance of each in terms of storage and output impedance. In any event, a single 500V cap (or equivalent) will work well in the second position. As an aside, you might consider redesigning the bias supply to eliminate the Zener diodes. If the bias voltage can "track" B+ changes, potential fluctuations in output stage bias current will be minimized.
Edits: 04/09/21
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Follow Ups
- Same Thing I'm Doing - Triode_Kingdom 09:25:30 04/09/21 (3)
- RE: Same Thing I'm Doing - rage 07:22:04 04/20/21 (0)
- RE: Same Thing I'm Doing - audioeyedoc 14:49:28 04/15/21 (1)
- RE: Same Thing I'm Doing - Triode_Kingdom 12:14:30 04/16/21 (0)
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