Hi,
I first posted this in the solid state forum, but realized that it probably belongs here.
I'm in the process of building an integrated amp with an Aleph J and BA-3 front end. I am planning to power both off of the 24V Universal Power supply, using a 18v/18v 500VA transformer.
I want to add the following remote control ladder attenuator, which appears to require 5V/1A.
High Quality Audio & Industrial Attenuators
What would be the easiest way to power it? Am I going to need to try to fit another small transformer in the case? If so, is this a good option:
10VA 5V + 5V 10VCT Small Toroidal Power Transformer Antek AN-0105 | eBay
Much Appreciated!
I first posted this in the solid state forum, but realized that it probably belongs here.
I'm in the process of building an integrated amp with an Aleph J and BA-3 front end. I am planning to power both off of the 24V Universal Power supply, using a 18v/18v 500VA transformer.
I want to add the following remote control ladder attenuator, which appears to require 5V/1A.
High Quality Audio & Industrial Attenuators
What would be the easiest way to power it? Am I going to need to try to fit another small transformer in the case? If so, is this a good option:
10VA 5V + 5V 10VCT Small Toroidal Power Transformer Antek AN-0105 | eBay
Much Appreciated!
it's OK , if data fro 5V/1A for attenuator is richly established
and I doubt that attenuator is needing as much as 1A , so you're most probably good
connect secondaries in parallel and you'll be good
though , some voltage headroom could be good thing , so try finding xformer with 6V3 of 7 or 8Vac secondary
and I doubt that attenuator is needing as much as 1A , so you're most probably good
connect secondaries in parallel and you'll be good
though , some voltage headroom could be good thing , so try finding xformer with 6V3 of 7 or 8Vac secondary
I guess your idea would work for Aleph J and BA3 FE voltage wise, but you aren't feeding the BA3 regulated power. How much difference this would make I don't know, But most stand alone BA3 FE do use regulated power.
I don't know if you could use 20 + 20 transformer, and if that would be high enough to regulate down to 24 volts ( for the feed to BA3, not Aleph J) or not. Or if BA3 FE would function well with slightly lower voltage, nor do I know if Aleph J will work well with higher rails, but I bet it would.
I do know who would, Mr Zenmod. I am only master of 24 hour ground wire.
Russellc
I don't know if you could use 20 + 20 transformer, and if that would be high enough to regulate down to 24 volts ( for the feed to BA3, not Aleph J) or not. Or if BA3 FE would function well with slightly lower voltage, nor do I know if Aleph J will work well with higher rails, but I bet it would.
I do know who would, Mr Zenmod. I am only master of 24 hour ground wire.
Russellc
Zen,
Another option I have come up with is to run this 5V regulator from Futurlec right off of the 24VDC from the universal power supply. Is that advisable in lieu of putting another transformer in the chassis?
5V High Power Supply Mini Board
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From what I've read from 6L6 and others on this site, the BA-3 does not require regulated power and should run fine off the 24 volts supplied by the Universal PSU and an 18V transformer. I built this PSU recently for an F5 and with the 18Vx2 transformer, the rails were at +25 and -25.
Oh yes it will function, just not as well without regulation.Ask Zenmods about shunt regulators. The difference may not be that great, but all builds of BA3 FE I'm aware of used regulation for sonlc purposes. Yes, not necessary for function, just Sonics.
Russellc
If I have space, I may add the super regulator board from the DIYaudio store and run it off the same 18V/18v transformer, but I will cross that bridge when I come to it. Right now I'm just worried about getting 5V for the attenuator control.
I'm also looking at whether I can use the super regulator board for that purpose. Thoughts appreciated.