GB for DC coupled B1 buffer with shunt PSUs

[Salas]

Hi All,


The 2 caps 4700uf Where is the max diameter ?

7.5mm leads spacing non snap in. They all have adequate diam.

 

[regal]

what sort of DC offset is on the output?

 

[Salas]

Many get around 1mV others 2-3mV. Its down to the audio fets matching mainly.

 

[regal]

Thanks, I take it without the pot the input impedance is 220K determined by R4, can this be made higher if not using a pot?

 

[Salas]

Sure, but not more than 500k I would prefer because at 10V they leak some stuff through their gates. Impact ionization or something else semiconductor physics thing that only people like Scott Wurcer really know to exactly tell. The only wafers I have seen in person were edible.

 

[poseidonsvoice]

Salas said:

I passed 100KHz square wave like no visual difference. Did not try to Bode plot it out, since my just making do generator would wimp out anyway.

Well, the standard cap coupled B1 is out to 700kHz per pappa Pass, so I am sure this unit is at least as far.

Thanks for the info...

Anand.

 

[Tea-Bag]

Arrival of Mesmerize Blue

Here is a few pics of Mez's that came in this afternoon. Will start shipping them on Saturday. Must perform day-job.

There are extra's as well, if anyone did not get in on GB, no extra relay's.

This is a full two layer board, no jumpers needed.

 

[johnwmclean]

They look awesome,
Tea-Bag do you know if a build thread will be started for the mesmerize? I've bought two boards and would like to set them up for balanced, any info in particular to this option would be of help.

Cheers
John

 

[Tea-Bag]

Hi John, no reason not to start a mesmerize building thread, or even a balanced thread for them. Of course at this point, a lot of cross referencing needs to be done, lot of questions already answered.

Make sure you note on my blog for DCB1, and DCB1 Blue Edition, there's a build thread that someone did at audiocircle, a build guide with notes, schematics and parts list to get everyone started.

 

[johnwmclean]

Thanks Tea-Bag a Mesmerize DCB1 Building Thread is now underway.

http://www.diyaudio.com/forums/pass-labs/176723-mesmerize-dcb1-building-thread.html#post2355744

 

[Horio]

Received my Blue Mez boards (and relays) today, and they look great. Thanks again Tea-Bag for setting this up, and to all who helped out. Can't wait to start populating this one.

 

[tincanear]

my Blue Mez Boards & Relays Arrived Today

Many thanks to Tea-Bag, Salas, CRT, "papa" and others that have made this project possible. Looking forward to building and testing...

thanks,
Bruce W, aka Tincanear

 

[Tea-Bag]

Just a note all, I was away until last night on an unexpected work trip,
So not all got shipped out. I am still packing these...no worries,
they are coming.

 

[janpo]

I got my blue Mez and relays today. Thanks for a great effort Tea-Bag.
Does anyone know who's selling those matched sk170bl ? I dont want to take the ones i have out of the Hypno board.

 

[Tea-Bag]

If you have spare unmatched one's for rest of circuit, then diymember BLUES is the guy.
Spencer also offers these in lots of 100, which you can glean a bunch of quads out of.

 

[Salas]

They all match quads also, don't they?

 

[Tea-Bag]

They all match quads also, don't they?

Yes, both sell quads as well. Both offer excellent service.

 

[Ed LaFontaine]

Omron G6H-2 12VDC relays

Greets,

In support of stuffing these boards I have started an interest thread in the Swap Meet to supply the Omron G6H-2 relays. Express your interest there.

It appears there is sufficient stock currently available. However they are no longer being produced.

http://www.diyaudio.com/forums/swap-meet/177054-omron-g6h-2-12vdc-relays.html

Thanks for all

 

[CxTurbo]

Got my relays in the mail today.

Thanks for the great service as always Tea-Bag

 

[Tea-Bag]

Hello,
All buyers have their boards shipped as of Wednesday, along with any relays.
Since I have only a few relays left, in case of a lost package, please refer to Ed's post above. It's a good deal, and of course vouch for his service.

I still have plenty of mez boards left.