carlmart said:My 25 cents contribution:
1) Just a high quality 100uF/50v for C1, not a tantalum.
2) Replace all other capacitors, 3.9uF and .68uF for film types. Nowadays they are small enough and cheap enough to be considered.
And see how it sounds now?
carlmart said:Just curious: as it is now, how does the preamp sound?
carlmart said:18v is alright too, taking some precautions. How many amps?
In any case your current should be very low and nothing to worry about, except if the transformer is too small.
Yours is 18v or 18 + 18? The latter will do, the former will not if you want to regulate with 317.
With 18v, after rectify and filter you will get 23.8v, which you will not be able to regulate to 24v. You can use it unregulated and heavily filtered, which should lag voltage down a bit more.
For 18 + 18, joined in series, you will get 49v, rectified and unfiltered. You would have to protect the 317 as suggested for the 48v above. There will also be exceeding 25v that will have to dissipate on the regulator, so you will need a larger heatsink.
For that supply you are planning I'd suggest transformers that may go from 20 to 24 or so. They can be split of course, like 10 +10 or 12 + 12: you just series the secondaries.
18v is alright too, taking some precautions. How many amps?
Yours is 18v or 18 + 18?
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