Hello,
Is there a way to figure out the max I draw for the linestage (+- 18Vdc input) with the high I output devices? I have the unit with VRDN PSU (1.5A) and thinking of tapping the PSU for +-15V 300mA volume control supply. Thank you!
Is there a way to figure out the max I draw for the linestage (+- 18Vdc input) with the high I output devices? I have the unit with VRDN PSU (1.5A) and thinking of tapping the PSU for +-15V 300mA volume control supply. Thank you!
The volume thing pulls 300mA? Wow. That’s a lot.
Regardless, it will be fine with VRDN and the BA2018.
Regardless, it will be fine with VRDN and the BA2018.
Hi Jim,
That was the recommended PSU rating if I am not mistaken. Maybe I look it up wrong. I agree, that is too much!
That was the recommended PSU rating if I am not mistaken. Maybe I look it up wrong. I agree, that is too much!
Post #153 from Wayne states the standard circuit draws +/- 25mA per rail per channel. Then you can add the extras.
Any chance the volume device would be noisy electrically, for example spikes of power consumption that would affect other items on the same PSU? I guess it's not driving a motorized potentiometer so maybe it's not that noisy. Let us know how it works out!
AFAIK, you have to be cautious when using the display, and eventually the remote, too. The muses itself is said to be dead-silent...
(having a kit myself, I'm also being curious about those details... I especially am looking for one of these extremly straight-forward methods to power that beast—@pfarrell i believe showed a nifty "jig" he made with 6L6's help, and there were others, like, 4-parts or 6-parts-solutions which I don't find anymore...)
Last edited:
Parts list, spec of Wayne's BA2018
Autumn is approaching and time to find some entertainment for dark winter days. Wayne's BA2018 could be fun. I ran over the thread but could not find things like a parts list and kind of spec. It's not that you do need one, circuit diagram and the (as always) nice board will do. However, if there is a parts list could anyone please let me know? Thanks guys.
Autumn is approaching and time to find some entertainment for dark winter days. Wayne's BA2018 could be fun. I ran over the thread but could not find things like a parts list and kind of spec. It's not that you do need one, circuit diagram and the (as always) nice board will do. However, if there is a parts list could anyone please let me know? Thanks guys.
some dear member of this forum somewhere earlier in this thread.
i just snatched the link.
be aware that some items are on mousers waiting list - so either wait or choose something similar e.g. same resistor with higher wattage.
cheers A.
i just snatched the link.
be aware that some items are on mousers waiting list - so either wait or choose something similar e.g. same resistor with higher wattage.
cheers A.
Thanks for warning! Guess most of the passives should be in my bunker anyway and the semis are not too exotic. Just the JFETs need to be genuine while the BJT's I guess can be replaced by others if so needed. Anyway, I sure will prefer to stick with the parts being on the list in order to avoid surprises.
I think it will be fine. The volume control is basically on standby once you are set to the level you want and listening. I mean the pot is not moving every time.
As mentioned pfarrell showed an example for getting +-15V from +-12V supply (Mouser Part # PQP3-D12-D15-D). You and I already have the VRDN (can be adjusted to +- 15Vdc and has 1.5A capacity) so it should be easily tapped.
I am still waiting for the volume control to show up. I am just trying to be ready.
Abe
Although I'm not sure about the display's demand, here's what seems to be a reasonable approach to feed the muses board (https://www.diyaudio.com/forums/pass-labs/258022-ba-3-preamp-build-guide-174.html#post6092414)
#1768 a little further down has a visualization. I got the parts already.
pfarrell's solution (was 6L6 involved?) ( PQP3-D12-D15-D ) is quite elegant as well. I can't tell which solution is, uhm, "electronically" better.
The more I listen, the more I like. It's probably going to displace the NS10 clone circuit.
Satisfying with both the M2 and a Threshold S/500. Not a fancy PSU - just a 3 terminal regulator with some capacitance.
I recommend the build. Don't let the SMD devices scare you off. I would recommend getting more than you need in case you happen to be the type of person that breathes. They blow away easy 🙂
Thanks again Wayne.
Satisfying with both the M2 and a Threshold S/500. Not a fancy PSU - just a 3 terminal regulator with some capacitance.
I recommend the build. Don't let the SMD devices scare you off. I would recommend getting more than you need in case you happen to be the type of person that breathes. They blow away easy 🙂
Thanks again Wayne.