Yes, if it wasn't for the extra hole in front panel and arranging front panel I would ALWAYS use two pots.
People's worries about constant "rebalancing" and "you wont hit it right" are meaningless. Guess what, a single pot isn't dead on either! Worse, it typically varies as you turn through the range. At least with two, or a balance pot you can.
Hooking them up so they both turn at same time removes the utility.
Russellc
People's worries about constant "rebalancing" and "you wont hit it right" are meaningless. Guess what, a single pot isn't dead on either! Worse, it typically varies as you turn through the range. At least with two, or a balance pot you can.
Hooking them up so they both turn at same time removes the utility.
Russellc
Thanks for that link/reference 6L6. (you always have great info/advice!)
The coarse/fine control idea is a really good one. The HFNRR article I mentioned above was one such design.
Having the facility to, first, adjust for source level differences and general level desired and then actually have fine control of the listening level that seems best is quite attractive.
I'm not as convinced of the dual control to deal with balance.
The coarse/fine control idea is a really good one. The HFNRR article I mentioned above was one such design.
Having the facility to, first, adjust for source level differences and general level desired and then actually have fine control of the listening level that seems best is quite attractive.
I'm not as convinced of the dual control to deal with balance.
That's my guess, based on the schematic. https://sep.yimg.com/ay/glass-ware/frontpanel-3.gif
And the price point looks really good, esp when compared to some stepped attenuators I have seen!
I had tried the Broskie volume control some years ago and found it to become tiresome after a while, went with a stepped attenuator and never looked back.
There is a cheaper smaller one also available from TubeCAD, which will enable me to fit everything into a 230mm wide, 280 mm deep 1U Galaxy chassis from Modushop...it does mean three holes in the front panel and you solder in all the resistors yourself but what the hey?
It's something I haven't really done much, only one build, the B1. The factory First Watt B1 had dual controls, so I cloned that feature as well.
I intend to finish my second BA 2018 LS, it will only have one volume pot. I would like to get away from resistive type pots altogether and follow the model that Zenmod uses with Iron Turtle...Autoformer style.
Russellc
Could you send a link?
I found TubeCAD mentioned on the Glass-ware stores, and this was the same link as 6L6 shared. $34 for a kit and you solder all the resistors yourself. FrontPanel
size appears to be similar to what you found, "The FrontPanel PCB is 1.4 inches (36mm) tall and 6 inch (153mm) long and will fit within a 1U rack-mount enclosure"
A quick search of the intertubes tells me the advantages an autoformer would have over resistive type pots.
Interestingly, the idea which may have kicked off the autoformer movement
The Slagle Autoformer Volume Control Modules Flawless reproduction of ambient clues and amazing spatial impression. Review By Dick Olsher
is a box with FOUR knobs. "Left" and "Right" each have independent course and fine adjustment knobs.
Yup, there are a couple in the 200 dollar range, discussed in Iron Turtle thread by Zenmod.
Iron turtle being ultimate version. This idea is ancient old school come back. Nothing new under the sun.
Russellc
Iron turtle being ultimate version. This idea is ancient old school come back. Nothing new under the sun.
Russellc
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Hello guys!
Are these good for the PSU?
This a dual power supply for hifi equipment. The PSU provides 100 mA of power without using heatsinks, and more than 300 mA with heatsinks mounted.
The power supply only requires a single AC input, from a 15-18 volts AC wall adapter (not included) or transformer.
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Any recommendations? Thank you!
Abe
Are these good for the PSU?
This a dual power supply for hifi equipment. The PSU provides 100 mA of power without using heatsinks, and more than 300 mA with heatsinks mounted.
The power supply only requires a single AC input, from a 15-18 volts AC wall adapter (not included) or transformer.
Any recommendations? Thank you!
Abe
6L6 mentioned that Muffsy PSU earlier in the thread (found via thread search tool). He said "it works great and is very compact".
PSU options!
There's also:
VRDN PSU
(compact)
and
Pete Millet's PSU
(You can find more about it on his site under his phone pre, which is what he made it for—I used this one in my BA18 build—VRDN wasn't birthed yet)(VERY compact since it includes the transfo)
and
Broskie PSU
There's also:
VRDN PSU
(compact)
and
Pete Millet's PSU
(You can find more about it on his site under his phone pre, which is what he made it for—I used this one in my BA18 build—VRDN wasn't birthed yet)(VERY compact since it includes the transfo)
and
Broskie PSU
Perfect AC wall-wart for muffsy PSU -
Schiit Audio: Audio Products Designed and Built in California
Get the 16V 500mA
Schiit Audio: Audio Products Designed and Built in California
Get the 16V 500mA
