I have searched and not found a satisfactory answer. I am something of a moron.
I am building a CCS-BOSOZ preamp. I have two complete power supplies, built and tested. Using both supplies will clutter my chassis design, the chassis is rather unique and somewhat constrained. I can fit both supplies and transformers, but things get really tight. Venting and heat may be an issue as the supplies will have to be stacked on top of each other in a narrow channel. I don't mind the challenge but I'd like to avoid it. I can use the spare supply for something else or sell it.
So, is dual mono really worth the challenge if the single power supply is well designed and performs just fine on its own? Will there be an audible upgrade if I do? Will I sleep at night if I don't?
I know, I can test it out for myself but I need to just get on with the build. I have very little time for my hobbies, and I tend to obsess.
I am building a CCS-BOSOZ preamp. I have two complete power supplies, built and tested. Using both supplies will clutter my chassis design, the chassis is rather unique and somewhat constrained. I can fit both supplies and transformers, but things get really tight. Venting and heat may be an issue as the supplies will have to be stacked on top of each other in a narrow channel. I don't mind the challenge but I'd like to avoid it. I can use the spare supply for something else or sell it.
So, is dual mono really worth the challenge if the single power supply is well designed and performs just fine on its own? Will there be an audible upgrade if I do? Will I sleep at night if I don't?
I know, I can test it out for myself but I need to just get on with the build. I have very little time for my hobbies, and I tend to obsess.
Hah, I watched Pipi when I was growing up in Poland.
But Zen, I don't know what I wish. I'm a flounder in this instance. Is dual mono a reasonable, desireble upgrade or is it just masturbation?
But Zen, I don't know what I wish. I'm a flounder in this instance. Is dual mono a reasonable, desireble upgrade or is it just masturbation?
It might depend on what your power supply looks like to start with ? If you are building the stock regulated supply from the article and then using those 22ohm resistor and 1000uf decoupling caps from the powersupply I seriously doubt you would notice any inprovement.
But you could replace that 22 ohm resistor with a cap multiplier mosfet stage just dropping 3 to 5 v so no heatsink would even be necessary for it.
But you could replace that 22 ohm resistor with a cap multiplier mosfet stage just dropping 3 to 5 v so no heatsink would even be necessary for it.
This is the power supply I am using: http://www.diyaudio.com/forums/pass-labs/53396-heatsinks-bosoz-8.html#post615015. I couldn't find the schematic just the PCB. it's a 60-0-9V
If I use only one there will be no temperature problems as I incorporated a good bit of venting into my chassis, with two I have no choice but to stack the two boards right on top of each other in a channel barely wider and taller than the completed boards. Basically, I am trying to stuff the complete preamp, including a relay based attenuator, I/O board, display...etc, into a chassis the size of a toaster. The PSU is on the bottom, preamp stacked on top and all control boards stuffed vertically on the side, all sections are separated by aluminium dividers with perforated sections around the hot bits.
If I use only one there will be no temperature problems as I incorporated a good bit of venting into my chassis, with two I have no choice but to stack the two boards right on top of each other in a channel barely wider and taller than the completed boards. Basically, I am trying to stuff the complete preamp, including a relay based attenuator, I/O board, display...etc, into a chassis the size of a toaster. The PSU is on the bottom, preamp stacked on top and all control boards stuffed vertically on the side, all sections are separated by aluminium dividers with perforated sections around the hot bits.
I would just go for one power supply. But I would bypass that 6v zener in the CCS with at least a 200uf cap as I would be more worried about that zener noise than any crosstalk between chanels.
Thank you.
I was also worried about EMI from the transformers mounted in such close proximity to each other. They are R core transformers but they would be mounted facing each other top-to-top with about a millimeter of space between them. No problem with just one, right?
I will make provisions in the chassis for the second supply and try it out down the road if I ever get the urge.
But... I still don't know if dual supplies are generally beneficial, or desirable for technical reasons in such a circuit or if it is just ego stroking. I like and use both approaches to life, minimalism and elegance, and enjoy the challenges of both. Where and when to apply either can be more perplexing to me than the challenge of each respective approach. Not that they can't be mixed. I usually go with my gut (with my woodwork/art designs) but in this case I am just ignorant and am relying on the knowledge of the wonderful people of diyAudio for guidance as I have for over a decade. Thank you. I love this place.
I was also worried about EMI from the transformers mounted in such close proximity to each other. They are R core transformers but they would be mounted facing each other top-to-top with about a millimeter of space between them. No problem with just one, right?
I will make provisions in the chassis for the second supply and try it out down the road if I ever get the urge.
But... I still don't know if dual supplies are generally beneficial, or desirable for technical reasons in such a circuit or if it is just ego stroking. I like and use both approaches to life, minimalism and elegance, and enjoy the challenges of both. Where and when to apply either can be more perplexing to me than the challenge of each respective approach. Not that they can't be mixed. I usually go with my gut (with my woodwork/art designs) but in this case I am just ignorant and am relying on the knowledge of the wonderful people of diyAudio for guidance as I have for over a decade. Thank you. I love this place.
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