Never seen it configured as such in the threads. The easiest way would be to predict behavior on virtual ground PSU with simulation software. See about DC offset etc.
Ok soooo…Balanced unit (2 mesmerize boards) which I already acquired. Looking for a little advice on BOM first big one is capacitors. Enlarging reservoir capacitors to between 40KuF (x4-10KuF) to 132KuF possibly off board? I will start there! Oh I have also procured an octet of “super matched” 2sk170(BL) 10.0mV.
2 x 0.0047 MuF will probably be enough unless you will be hotrodding it. Load current in original form is quite low AFAIK.
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Yes I plan on running at 200mV tuning.That would be standard reservoir obviously that would be (x4) not 2.
Is the signal ground referenced to chassis though? This can help with hum in some cases.
"The ground loop breaker is a 10Ω 5W resistor in parallel with a 0.1µF capacitor rated at least 250VAC"
"The ground loop breaker is a 10Ω 5W resistor in parallel with a 0.1µF capacitor rated at least 250VAC"
Not my drawing, but I believe it means using the left channel designation on each stereo board for negative phase and the right channel designation for positive phase. Resulting to one balanced channel per stereo board.
Ok for some reason maybe I am mistaken I was thinking one board was NEGATIVE bias L/R and the opposite board was POSITIVE bias L/R?
You are right to get initially perplexed by the way its written on that diagram
I have way too many ideas! Has anyone amputated the Psu on a Mez? I have looked and found some stuff on VSSC but it doesn’t quite translate well to me and I believe it was a hypnotize as well (late night reading). Curious because I was thinking of integrating UBiB and MEZ for line with DCG-3 and UBiB in a separate enclosure. So integrated DCG-3/Mezmerize in 1 enclosure and separate UBiB power supply in a separate enclosure. As far as the diagram the only reason I even gave it thought was because of who posted it! New DMM showed up today SANWA PC7000! OOOHHHYEAAH!
And scratch the diarrhea of the brain!!! I would love to but way to complicated I would have to lower the output of the psu on change over. Maybe later or eventually design something from the ground up with a gain cell (Gilbert cell). Sorry guys no more hypothetical stuff. But my big hang ups are
Reservoir caps and torridals and has anyone run a D.A.C.T. Volume pot?
Reservoir caps and torridals and has anyone run a D.A.C.T. Volume pot?
Is there a clean schematic available? The only one I can seem to download is the type overlaps between many components! Not a total deal breaker (lol I already have 2 boards and 8 “SUPER” matching 2sk170(BL) @ 10.0mA) but would be incredibly appreciated if I had access to a clean schematic when finalizing my BOM. I am documenting everything and plan on posting everything here in stages and at finish. More for an updated current source for anyone new building these units because as it being an “older” design/project all the documentation is very scattered and a little confusing. All be it I may change my mind a little bit on that whole idea later if swayed. I know that there are people and companies that love to steal proved concepts. Anyway a clean schematic would be very nice.
Originally around 2008 tryout boards were made following my hand drawn audio part and bit later the shunt PSU part schematics.
The relays input selector part of the Mezmerize version (two z was intentional) was done after my descriptive instructions. Thus the only complete schematics were copied from the Eagle PCB software depiction with workable symbols it understood. That's why there never was a comprehensive complete theoretical schematic. The DCB1 projects materialized live on the forums back in the day.
The relays input selector part of the Mezmerize version (two z was intentional) was done after my descriptive instructions. Thus the only complete schematics were copied from the Eagle PCB software depiction with workable symbols it understood. That's why there never was a comprehensive complete theoretical schematic. The DCB1 projects materialized live on the forums back in the day.
* A BOM with some instructions I wrote in 2018 can be found linked in the DIYaudio store for the Mezmerize "Ten Years After" edition I dedicated to the store.
I have that one! And appreciate it! I plan on as I said donating my updates and what I do that works and doesn’t work. I am clinically insane and OCD. And document everything that I do. Any tools that are helpful you may recommend? I have lots of MM and an oscilloscope as well as a Dats (that is a lot more than I thought it was, in a good way) I’ve been shopping for a good PCB holder and in the process came me to the conclusion that the only one stands out but crazy $$$. I also have a good iron and hot air gun. I am using Kester44 62/36/ag2-0.025” solder…..
You have more than enough tools. Building a DCB1 was always simply a matter of populating parts with the right values and types as printed on the board.
Having a well matched for IDSS 2SK170BL (or equivalent) JFETs quartet and not to overheat the LEDs by dueling too long with the iron were almost the only concerns, besides deciding on what surface to mount the PSU MOSFETs. Dedicated sinks or chassis floor. Always with isolating thermal pads.
Hundreds were made using the standard on-board PSU set on the typical 150-200mA standing current. Usually successful on first turn on and very long lasting without failures.
Having a well matched for IDSS 2SK170BL (or equivalent) JFETs quartet and not to overheat the LEDs by dueling too long with the iron were almost the only concerns, besides deciding on what surface to mount the PSU MOSFETs. Dedicated sinks or chassis floor. Always with isolating thermal pads.
Hundreds were made using the standard on-board PSU set on the typical 150-200mA standing current. Usually successful on first turn on and very long lasting without failures.