.1uf, I used these based on a recommendation from one of the posters here.
BFC241641004 Vishay / BC Components | Mouser
BFC241641004 Vishay / BC Components | Mouser
Thank you!
I wonder if they are any (real) audible differences when using full pp vs electrolitic+pp bypass... hard to sort out real stuff from some people's imagination (sometimes weird like weirdly oversized power cords that "sounds neutral".).
Have you compared or tried it for space/price concerns?
But re-reading my post i realize there must be some; otherwise MrPass which is the opposite from a cable/capacitor mysticist would not approach stage separation using PP!!!
I've built BA-3 with both 10uF film and 10uF Electrolytic with film bypass. Honestly I can't tell much, if any difference.
50V: https://www.mouser.com/ProductDetail/555-RFS50V100MG3%235
(actually a 10uf, I used 2.2)
Based on articles referenced on this site I looked at the input impedance of my amps and went with the lowest cap value that matched. It make sense, since the function of the cap is to filter DC, not to change the sound. So a smaller cap has less in the signal path to alter the sound signature.
That's my story and I'm sticking to it! 😀
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I have heard that if a coupling cap is an electrolytic instead of poly it should be 10X the "normal" value if used for coupling. Pass regularly uses 22uf-100uf if electrolytic, bypassed with a poly cap. Look at the Pearl 2 or find some pics of other Pass Labs gear on the internet.
I have tried Silmic 100uf + 10uf clarity cap vs. just 10uf clarity cap. Yes, I could hear the difference. And the silmic was not brand new.
I have tried Silmic 100uf + 10uf clarity cap vs. just 10uf clarity cap. Yes, I could hear the difference. And the silmic was not brand new.
Honestly, I can't remember why. It may be because electrolytics have a greater tolerance rating (usually 20%) vs. poly caps. But I seem to remember it night necessarily being about the cut-off frequency but rather something else. I'lll have to do some research.
Silmics are nice if you want a darker sound without losing detail I have found...and they can sound less grainy than a cheap poly cap. I liked just the poly cap better, a little more snap and focus. But I can see how some people would like the silmic in there. I am more of a "visual" listener so usually prefer whatever projects the soundstage the best, even if it's at the expense of tonality or bass.
Thanks to all the good advice received here I've acquired all the parts for the power supply and BA3FE boards and hope to start soldering this weekend!
I have a newbie question about dual mono power supply setup. My plan is to run two transformers into the Glassware Dual/Bipolar LV-Reg. Do you need a separate power plug and IEC for each transformer, or do you wire the two transformers to the one IEC? I'm about to order the chassis from the DIYstore with CNC work and want to make sure I have the necessary holes punched out.
Thanks!
Scott
I have a newbie question about dual mono power supply setup. My plan is to run two transformers into the Glassware Dual/Bipolar LV-Reg. Do you need a separate power plug and IEC for each transformer, or do you wire the two transformers to the one IEC? I'm about to order the chassis from the DIYstore with CNC work and want to make sure I have the necessary holes punched out.
Thanks!
Scott
Thanks, Marra! What would an appropriate fuse value be if I'm using two 50VA 20V transformers?
Only because in some correspondence with member ggetzoff he highly recommended going full dual mono with separate transformers. He found a major improvement in soundstage and stereo separation. That being said, this is my first build aside from the ACA, so I've considered starting with a single power supply before going to dual mono just to learn and to hear the difference for myself.
I'm using the Antek AS-0520 so I could try it out as you suggest. I'm sure I'll be posting for help/verification once I get to the wiring up stage!
You won't make it dual mono unless you also have two complete PSU boards...
Use one AS-0520 to start, get everything working properly and as expected first, then modify from there. Don't try to get too far off script right at the beginning. 🙂
Use one AS-0520 to start, get everything working properly and as expected first, then modify from there. Don't try to get too far off script right at the beginning. 🙂
Wise advise, Jim. Thank you. I'll take it slow! 🙂
As an aside, and just so I understand for down the road: It looks to my neophyte eyes like the Glassware Dual/Bipolar Reg can be configured to, in effect, be two PSU boards. Am I completely off on that reading?
And finally, one more question about C3 before i start soldering: what's the range of capacitance that can work for that cap? I got a pair of these Cornell Dubliner 4.7uFs to use. Is that too far off the recommended 10uF or will they work?
Thanks for all the help!
No, you will need two separate power supply boards for dual mono. There are two boards but one is + and one is - and both are needed for each channel.
Russellc