Salas hotrodded blue DCB1 build

[william2001]

ppcblaster - I would keep the shunt current around 100 mA if staying with those 'sinks. Stay around 20 ohms or so for those current set resistors. I ran mine that way for awhile. It would live a long happy life, and sound great. You'll certainly need more substantial heatsinking if you decide to "drop the hammer".

 

[ppcblaster]

ppcblaster - I would keep the shunt current around 100 mA if staying with those 'sinks. Stay around 20 ohms or so for those current set resistors. I ran mine that way for awhile. It would live a long happy life, and sound great. You'll certainly need more substantial heatsinking if you decide to "drop the hammer".

Thank You,
Good to know,

I have a box of heatsinks plus we have Russ Boss here in the forum somewhere. I am going to go with bigger HS's.

 

[Russellc]

Say, can anyone tell me if it is OK to use the MUR 840/60 instead of the MUR 120 in the "non hot rodded" DC-B1? I have every intention of building the Hot rod, but thought I would make sure its good standard, then go to full throttle.
Maybe just build it hot rod from the get go?

Russellc

 

[Salas]

Of course, they are diodes after all. They will do the job. Just put the 10R 5W, use the box's floor as sink, and it will do OK.

 

[Russellc]

Of course, they are diodes after all. They will do the job. Just put the 10R 5W, use the box's floor as sink, and it will do OK.

Thanks for the reply, figured I'd just check that out. 10R 5W it is!

Russellc

 

[dvb projekt]

Updated build status

...Hotrod modification installed...

An externally hosted image should be here but it was not working when we last tested it.

Also the Lightspeed was modified. The onboard 7805 is gone and he got his own "Salas Shunt Reg."

An externally hosted image should be here but it was not working when we last tested it.

What i could hear is......Chapeau ​

 

[Salas]

If it can differentiate positively to an Audionet preamp its a good sign. Congrats.

 

[dvb projekt]

At the moment the Audionet is between the DCB1 and the 300B´s but i´m looking really forward to connect the DCB1 direct to the mono´s tomorrow.

Today i am running out of time because i have a barbecue in half an hour


Oliver

 

[Salas]

So what you hear by now is not the full substitution test. OK let us know then. Have a good BBQ meantime.

 

[william2001]

Great job Oliver, looks awesome. Definitely my favorite "Blue". Allow an hour or two of warmup before any serious listening. And I think it takes a little time for everything to "settle in" on a brand new build. Awaiting impressions.....

 

[Malka07]

Looks Great Oliver

But i dont think it will be long before it really becomes hotrodded

At the moment im running my DCB1 at 350ma...and it sounds so much better.

Cant wait to hear your impressions.

Alon

 

[Nick77]

Dvb sweet looking board!! Where did you source those cool looking heat sinks? Anyone know?

 

[dvb projekt]

The Heatsinks are from Fischer Electronic typ SK68.

I use the 75mm version and shorted it to 60mm, so they fit perfect to the mosfet´s.

 

[Marra]

I wired up my Hypno this afternoon; single input and the output through two 4uf wondercaps as neither my Aleph 5 or F5 has an input cap. The p/s voltageswere 9.6 & -9.58v with dc offsets less than a mv[as posted previously].When I checked the dc offset after the caps I had readings of 26mv and 100mv which slowly dropped towards zero if I held the probes there.
Can anyone explain this to me please and is it a problem?
Thanks in advance.
Marra

 

[Salas]

Use 1Meg resistors from cap output to ground. The probes played the role of such resistors.

 

[Marra]

But aren't there already 1Meg resistors on the pcb?

 

[Salas]

On the DC out, now you put a cap after it, its other end is floating.

 

[Marra]

Thank you Salas; now I understand. Still learning. Two resistors it is.

 

[Salas]

It would actually zero when you connect to the amps load, but its not good to have a charge and then connect, accidents happen if an amp is forgotten on for instance and there is a discharge thump with DC component too.

 

[Marra]

I added the 1Meg resistors after the output cap and everything is as it should be. The blue hypno is now connected in my system and making good music. If first listen is anything to go by I'm really going to enjoy owning this buffer; so dynamic and the bass.......