Salas hotrodded blue DCB1 build - Page 230 - diyAudio
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Old 4th November 2012, 11:02 PM   #2291
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Originally Posted by Salas View Post
The your choice stuff is about parts ''quality'' not values. We can't recommend pricey parts to everybody. It works without electrical differences from generic to ''Rolex''.

There are options between high CCS, low CCS, reg only, full buffer. Matched fets are the quad behind the relay.

Big diodes and big 10W 10R resistors and big heatsinks make it hotrod. Small diodes, 47/47R small resistors, mini heatsinks make it regular.

Tea had a blog I think showing the prototype constructed.

Blue DCB1 is not a kit, its a better board for a very extensively discussed project. Has its options, and its very easy to figure. All builders are happy to explain specifics.
Wonder why 10 ohm resistors did not make it hot at all ?
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Old 4th November 2012, 11:18 PM   #2292
AndrewT is offline AndrewT  Scotland
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Which bit do you want to get "hot"?
The 10W resistor, or the Shunt mosFET, or the CCS mosFET, or the PCB traces, or ...... ?
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regards Andrew T.
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Old 4th November 2012, 11:47 PM   #2293
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Which bit do you want to get "hot"?
The 10W resistor, or the Shunt mosFET, or the CCS mosFET, or the PCB traces, or ...... ?
The shunt mosfet or just something .As I remember nothing got Hot at all. It is in our club and for some reason we have not used it yet. It was intended for use with bad designed Audio Note dacs.
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Old 5th November 2012, 12:15 AM   #2294
Salas is offline Salas  Greece
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Use 2.2R 10W resistors and it will get hot. Those MOSFETS are 0.83 RΘJC devices included to can go in amperes constant current if chosen so. Use green 2V+ leds in the triplets to aid voltage drop over the Rset as the Vgs nears the total Vf with stronger current choices. Have your K probe or laser aiming thermometer handy to check your sinks are sufficient.
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Old 5th November 2012, 12:23 AM   #2295
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Originally Posted by Salas View Post
Use 2.2R 10W resistors and it will get hot. Those MOSFETS are 0.83 RΘJC devices included to can go in amperes constant current if chosen so. Use green 2V+ leds in the triplets to aid voltage drop over the Rset as the Vgs nears the total Vf with stronger current choices. Have your K probe or laser aiming thermometer handy to check your sinks are sufficient.


Maybe I will try that in the New year ! We have to listen to it first to exsperience if there is need for that.
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Old 5th November 2012, 12:26 AM   #2296
Salas is offline Salas  Greece
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Need no, diy urge yes.
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Old 5th November 2012, 12:27 AM   #2297
Salas is offline Salas  Greece
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Those MOSFETS really pick up when run heavy, they are big VMOS like the ones you have seen in class A American amps. 10R is just stage one. If its sinked on a biggish plate or chunky sinks you won't feel it hot.
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Old 5th November 2012, 05:46 AM   #2298
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Hi Tea-Bag,

any boards and kits left?

Regards,
Should I go to China?
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Old 5th November 2012, 05:47 AM   #2299
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Should I go to China?
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Old 5th November 2012, 06:01 AM   #2300
Salas is offline Salas  Greece
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Come to Greece, I will give you one, we are near.
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