If anyone here had a chance to compare the sound quality of the frankwilker and meldano devices?
The question is in op-amp, if it influences the sound, looks like Meldano follows Mr. Pass philosophy and Frank prefer to follow the Muses spec.
The question is in op-amp, if it influences the sound, looks like Meldano follows Mr. Pass philosophy and Frank prefer to follow the Muses spec.
I too am curious about all of this... just for my own edification... suffice it to say that there is a very nice audible difference with meldano's solution in place. Totally worth the effort. Frank's version looks equally great and well considered—his display is completely awesome—would love to build it too!
All respect to Mr. Pass but no "Pass philosophy" here whatever that may be. Both circuits are NJR MUSES 72320 datasheet information.
to follow his own way... no?
Anyway, still no one can offer the objective / subjective opinion on these two designs?
I guess that Pass uses no opamps, just his own circuitry for gain, while the other does. As written, both approaches, with or without opamps are all in the datasheet.
I'm currently finishing a psu with standard 7815/7915 (for analog Muses) with two 7805s (one for digital Muses and the other for the controller / display). I'm very much interested in comparing it with modern low THD LDOs (I have another Meldano kit with I-Select)
I guess that no-one has done it and could give some subjective option if it's worth the effort
In the picture the psu and Muses pcb are placed under Salas I-Select
I'm currently finishing a psu with standard 7815/7915 (for analog Muses) with two 7805s (one for digital Muses and the other for the controller / display). I'm very much interested in comparing it with modern low THD LDOs (I have another Meldano kit with I-Select)
I guess that no-one has done it and could give some subjective option if it's worth the effort
In the picture the psu and Muses pcb are placed under Salas I-Select
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No, without OPA.
I don’t like OPA‘s.
If you use 78/79xx you have do do it like Pass Labs and choose NJR Types 😉
I don’t like OPA‘s.
If you use 78/79xx you have do do it like Pass Labs and choose NJR Types 😉
Here's a small one I found (not the cheapest with US shipping—but he's using the regs Jean-Paul mentioned earlier in the thread):
LT3045/LT3094 Ultra Low Noise Dual Polarity Power Supply
I think Daniel mentioned to me that the one in the docs is an ebay item....
Also—here's a guy who made one with LM317/337 who's got gerbers for download at the bottom of the page—very kind of him!:
MiniPow LM317/337 Bipolar Power Supply -
I'm hooked—Muses is worth the effort.
LT3045/LT3094 Ultra Low Noise Dual Polarity Power Supply
I think Daniel mentioned to me that the one in the docs is an ebay item....
Also—here's a guy who made one with LM317/337 who's got gerbers for download at the bottom of the page—very kind of him!:
MiniPow LM317/337 Bipolar Power Supply -
I'm hooked—Muses is worth the effort.
Thank you Meldano,
I have your kit (a stereo one) with the controller but unfornatully was waiting some dac to integrate it at output 🙂
What is the best regs that not waste the volume controller please for the Muse chip , defintly the NJR 78/79xx or disearve a better (as I also have some other on hands : Ti, LT, etc) ?
I have your kit (a stereo one) with the controller but unfornatully was waiting some dac to integrate it at output 🙂
What is the best regs that not waste the volume controller please for the Muse chip , defintly the NJR 78/79xx or disearve a better (as I also have some other on hands : Ti, LT, etc) ?
The PSU in the manual was only for testing (LM317/337).
Pass Labs use the NJR 78/78
I tested the NJR, LM317/337, LT3045/3094, TPS7A49/TPS7A30
In my main system (Pass clone) I prefer the TPS types.
My college prefer in the same Preamp the NJR.
Pass Labs use the NJR 78/78
I tested the NJR, LM317/337, LT3045/3094, TPS7A49/TPS7A30
In my main system (Pass clone) I prefer the TPS types.
My college prefer in the same Preamp the NJR.
wow.
These regs/psu look cool. But pricey their shipping is indeed.
Found just one other who seem to have similar, though inferior?, developments: audiophonics.fr (with seemingly identical stuff on alibabamazon for 2/3 the price...)
mpaudio.net has no pos/neg, just single or dual rails. They sell quasimodo-boards too ???
So I'm filling a DigiKey-basket (CHF 21 / € 19.50) to see what this gives... soldersoldersolder 🙂
(Actually, I'm either weird or hooked: Salas told me I could take the 15V directly from the Mez B1, dunno why I should—or must—go nuts on a PSU)
These regs/psu look cool. But pricey their shipping is indeed.
Found just one other who seem to have similar, though inferior?, developments: audiophonics.fr (with seemingly identical stuff on alibabamazon for 2/3 the price...)
mpaudio.net has no pos/neg, just single or dual rails. They sell quasimodo-boards too ???
So I'm filling a DigiKey-basket (CHF 21 / € 19.50) to see what this gives... soldersoldersolder 🙂
(Actually, I'm either weird or hooked: Salas told me I could take the 15V directly from the Mez B1, dunno why I should—or must—go nuts on a PSU)
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Thanks again Meldano, I have third regs on your list, I will find one that will suit my system 🙂
pfarrell, I saw you are (were?) using a nifty little jig (6L6!), what do you think about this? (It seems the hook-up can be quite forgiving?) — would be very nice too...
And—if used in a "passive", a mini tranny ~10VA would be sufficient?
And—if used in a "passive", a mini tranny ~10VA would be sufficient?
Hello everyone,
A short explanation of the design of my Stand Alone Potis. The used OpAmp (a NJR) by the way, is only used by the Muses chip when it is in gain mode.
This mode is not used in my version. So it has no influence on the sound and could simply be left out.
The coupling capacitors can also be removed if it is ensured that no DC voltage is present at the input or output.
A short explanation of the design of my Stand Alone Potis. The used OpAmp (a NJR) by the way, is only used by the Muses chip when it is in gain mode.
This mode is not used in my version. So it has no influence on the sound and could simply be left out.
The coupling capacitors can also be removed if it is ensured that no DC voltage is present at the input or output.
I haven't presented my Oled version here yet, because a tiny part of the software still needs to be checked. But if you want to, you can have a look at it:
Pot with Display
Pot with Display