Mezmerize DCB1 Building Thread

[Audio Zen]

Pics of my Mez

I used my old chassis which housed the B1 buffer. I added an HT switch so my kids could still play their games by just flipping the switch instead of messing around with source and volume.

I am done with my Mez, no more tweaking (I hope). btw going from 68r to 27r made a huge difference in soundstage, music is fuller. I am also hearing a little more in each track.


Now on to Salas' JFET RIAA.....

 

[Salas]

Congrats. Some hi-tech resistors, clean cabling, Nichicon caps, catch the eye.

 

[ncc]

My Dcb1 has some whistle sound coming from right channel. Not very loud but can be heard from a distance of 2.5m. This sound is not continuous, it may appear for a few minutes then dissapear and then come back a few minute later. Is this a kind of oscillation?

 

[Salas]

Probably if you drive particularly long cables from it. Do you?

 

[ncc]

Hi Salas,
The IC cable is 1m to the power amp. Do you think it's a little bit long?
I actually don't need such long cable since my preamp is on top of the power amp.

 

[Salas]

No its not unusually long. Tap on the interconnects while it whistles, does it stop? Swap the output interconnects from end to end for a test. Then the input ones. Does the whistle move from the original speaker to the other? If yes, some IC cable has a cold joint? Having another pair to try? If it still does it, check the solder joints for internal cabling, connectors, whatever in the input and output path the whistle appears. Tap on various parts first.

 

[merlin2069er]

Where can I get a BOM (with pricing) for the original hypnotize?
I like to get a rough idea of what it cost me (populated board).

 

[Salas]

This is the closest recent: http://www.diyaudio.com/forums/pass-labs/176723-mezmerize-dcb1-building-thread-72.html#post3411763

 

[Rush]

Where can I get a BOM (with pricing) for the original hypnotize?
I like to get a rough idea of what it cost me (populated board).

See attached pdf. A few years old.

Rush

 

[Audio Zen]

This is the closest recent: http://www.diyaudio.com/forums/pass-labs/176723-mezmerize-dcb1-building-thread-72.html#post3411763

Thats the BOM I used. I added Yellow led from Mouser:

p/n : 593-VAOL-3HCE4

 

[AndrewT]

I use 3m star quad cat5e interconnect cables with no problem.
These are relatively high capacitance.

 

[Stuey]

Hi,

Is there anyone still selling the matched sets of 2SK170's?

Thanks

Stuey

 

[Audio Zen]

Hi,

Is there anyone still selling the matched sets of 2SK170's?

Thanks

Stuey

Alweit on ebay sells them He/She has a good reputation here form some threads I read. I purchased a bunch of them from him and pleased with the transaction.

 

[Stuey]

Thanks Neville.

 

[Gooch]

Hello
I have a question I am putting together a parts list to build the DCB1. I have on hand some LED's that are 3mm I bought from Digi Key sometime ago 3 packs of 10 green, red, and orange I started to measure them the green 2v and both the red and orange 1.8v across my DMM I know the voltage for the green is to high do you thinked the others will work or should I play it safe and order the one on the BOM here is the digi-key part # 67-1058-ND and the spec for the LED
http://www.lumex.com/specs/SSL-LX3044LGD.pdf

I am not an expert thats way I am asking
Thanks
Dave

 

[Salas]

Use the green in the string of 3 and the red in the string of 5 and you will be good.

 

[Gooch]

Use the green in the string of 3 and the red in the string of 5 and you will be good.

Thanks Salas for the quick replay

 

[HiFi Rookie]

I will be starting on the B1 from diy audio shortly. I am new to DIY audio and as I am about to order the board and parts, is there anything else I should be ordering? I want this preamp to have volume control and input selector.
Thanks to anyone willing to help the noob.

 

[Salas]

RCAs, internal wire, a box, IEC receptacle I suppose. Review your order list VS some picture of such a finished pre of those you can find in here.

 

[HiFi Rookie]

Thanks! what are a couple sites you would recommend for purchasing RCAs?
Will I need any additional components (other than the diyaudio parts list) to set up volume control?