One meter across R10 (Black arrows)
One meter across R11 (Blue arrows)
To measure bias. (You can measure just one, then zero offset, the other one will balance.)
One meter before C3 and ground to measure offset (Red arrows)
Attachments
Are you looking for permission to turn the variac up to 100%? Go ahead!
LOL!!! Yes, permission is required to turn it up ahead of schedule....the quantum matrix needs to burn in gently so it doesn't suffer a polarity shift and go up in smoke necessitating a delay while black market contacts are contacted for rare unobtainum Toshiba parts....
Actually I was just tired and happy I didn't see smoke at that point, so I shut it off and watched TV....LOL
Actually I was just tired and happy I didn't see smoke at that point, so I shut it off and watched TV....LOL
I'll try to post pics tonight, but we can add another successful build to the list 
Fully powered up without any issues, was running last night for several hours at 90% bias. When hooked up to my test rig of a simple class-T amp and some spare speakers I could immediately hear its clarity and noise free background. I can't wait to hook it up to the main rig tonight!
Fully powered up without any issues, was running last night for several hours at 90% bias. When hooked up to my test rig of a simple class-T amp and some spare speakers I could immediately hear its clarity and noise free background. I can't wait to hook it up to the main rig tonight!
Looks like this one - Preamp Amplifier Chassis / DIY Aluminum Case DAC amp chassis /size 315*355*115MM | eBay
Yup, that's the one. Machine work was very well done, everything lines up, sits level, not a scratch on it when I received it. The source selector has holes for LEDs but I have not seen anyone make this chassis and develop a way to have LEDs light up with your source position - that would be extra cool.
It looks legitimately high-end sitting on the shelf
It looks legitimately high-end sitting on the shelf
The source selector has holes for LEDs but I have not seen anyone make this chassis and develop a way to have LEDs light up with your source position - that would be extra cool.:D[/QUOTE said:Hello soundwavesteve
just duplicate the line selector, one half selects the input and the other selects V+ for the led you want to turn on.
Something like this:
Best regards
carlos
Ah, simplest solution is best! I don't know if I can do that with Glassware's Select Switch:
Stereo selector switch
If my power supply wasn't in the way I could put the GW switch as second behind another switch that was connected to the leds......
Stereo selector switch
If my power supply wasn't in the way I could put the GW switch as second behind another switch that was connected to the leds......
You'd need a different switch, there's a drawing in this .pdf that would help explain. It's pretty easy. https://www.diyaudio.com/forums/att...-input-selector-volume-control-i_select-2-pdf
from here - GB For Salas I-Select Mesmerize Type input selector and volume control
from here - GB For Salas I-Select Mesmerize Type input selector and volume control
Stereo Selector Switch
Has anyone tried the Stereo Selector Switch linked in post 1716? The selector switch itself could be a rip-off of the Mesmerize, but I am primarily interested in the relay operated volume control: 128 steps! Besides the selector board board is possibly available through Tea-Bag if I can get in on a GB sometime Two of these goodies could be used to drive a BBA-3giving tracking as accurate as the builder was fastidious, as long as they were kept independent it could also allow for balance adjustment. Hmmmm, I'm interested especially because I have two BA3Gs ( only one of which is yet populated, but that could easily change,,,.
Hal
Has anyone tried the Stereo Selector Switch linked in post 1716? The selector switch itself could be a rip-off of the Mesmerize, but I am primarily interested in the relay operated volume control: 128 steps! Besides the selector board board is possibly available through Tea-Bag if I can get in on a GB sometime Two of these goodies could be used to drive a BBA-3giving tracking as accurate as the builder was fastidious, as long as they were kept independent it could also allow for balance adjustment. Hmmmm, I'm interested especially because I have two BA3Gs ( only one of which is yet populated, but that could easily change,,,.
Hal
