Old Style DCB1 vs Hot Rod DCB1? whats the difference in sch?

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#4
They are almost "the same" I guess.
http://www.diyaudio.com/forums/blogs/tea-bag/296-salas-hot-rod-dcb1.html
Hot Rodding the dcb1 is tweaking different style. Its all in the big dcb1 thread 🙂
The CCS of original design of the "Mezmerize B1 Buffer Preamp", which I believe is the ancestor of the "Salas HOT ROD DCB1", is set at about 60mA. The CCS at the HOT ROD version can be set from 200 mA to 2A!! Now you know why it's called the HOT ROD version. It's able to run very hot! To set the CCS to shunt 200 mA the CCS resistor needs to be 10 Ohm. Setting it to the next tier of 600 mA requires a 3.3 Ohm CCS resistor or a 10 Ohm and 5 Ohm resistor in parallel. I decided to set the CCS to 200mA by using the 10 Ohm resistors. This way the IRFP 240 and 9240 MOSFET's can be bolded to the chassis without them running to hot. In fact they just heat up to about 40 °C. No need for additional cooling.
Click to expand...
 
#5
The standard DCB1 has three locations for the current setting resistor/s
Fitting one resistor sets the standard ~200mA, fitting two resistors sets to ~400mA, fitting three resistors sets to ~600mA.

As with ALL shunt regulators, one MUST design the cooling to suit the dissipations.
 
#6
AndrewT said:
The standard DCB1 has three locations for the current setting resistor/s
Fitting one resistor sets the standard ~200mA, fitting two resistors sets to ~400mA, fitting three resistors sets to ~600mA.

As with ALL shunt regulators, one MUST design the cooling to suit the dissipations.
Click to expand...

http://www.diyaudio.com/forums/blog...883361-old-style-dcb1-information-plus10v.gif

Is it the 10ohm resistor which is to be changed and yes agreed about its power dissipation for the Mosfets. But which resistor to be changed to be precise?
 
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