Salas hotrodded blue DCB1 build - Page 38 - diyAudio
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Old 23rd September 2010, 11:02 PM   #371
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Yeah, they are excellent performers. What really surprised me is how tightly they grip the buggers, considering there's no bolt - tight and flat on the mosfets and conducting well. You have to support the legs very well when squeezing them on of course.
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Old 23rd September 2010, 11:42 PM   #372
Salas is offline Salas  Greece
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Quote:
Originally Posted by LucasAdamson View Post
Yeah Oliver, why not hot that rod up!

10R wirewounds and new bigger heatsinks. Take a look at the Indian Chief's I'm using from Farnell - you'll like them Indian Chief Heat Sink
He is already in stage 1 hot rod I believe. Salas hotrodded blue DCB1 build
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Old 24th September 2010, 12:03 AM   #373
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He is already in stage 1 hot rod I believe. Salas hotrodded blue DCB1 build
Bloody hell Salas, I didn't realize there were stages in the hot-rodding process!

Would you mind giving me a run down on the component values for each stage including the expected mA for each stage.

So -

stage 1 = 10R (80mA?)

stage 2 = ?

Etc

Thanks
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Last edited by RichLund; 24th September 2010 at 12:06 AM.
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Old 24th September 2010, 12:08 AM   #374
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Originally Posted by LucasAdamson View Post
Yeah, they are excellent performers. What really surprised me is how tightly they grip the buggers, considering there's no bolt - tight and flat on the mosfets and conducting well. You have to support the legs very well when squeezing them on of course.
Thanks Lucas.

What level of hot-rodding are you at? And what level do you think the heatsinks could handle?

Cheers
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Old 24th September 2010, 12:23 AM   #375
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Rich,

You are kidding, right? 10R 5W is the standard Vindaloo, I believe. It's the required heat. If you want to go and order yourself a Phal, well... that's pretty manly stuff and we'll all respect you a lot!

Salas,

Ah yes, he's got himself some fancy hotrod sinks already.

Oliver,

It must be very satisfying, making such quality stuff from the very best parts! I'm a tad envious I must confess. Thanks for sharing your projects so openly! It's helped me a lot.
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Last edited by LucasAdamson; 24th September 2010 at 12:29 AM.
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Old 24th September 2010, 12:25 AM   #376
mach1 is offline mach1  Australia
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The way this is going I can see some F5 sinks coming in to play soon ...
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Old 24th September 2010, 01:02 AM   #377
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Rich,

You are kidding, right? 10R 5W is the standard Vindaloo, I believe. It's the required heat. If you want to go and order yourself a Phal, well... that's pretty manly stuff and we'll all respect you a lot!
I'd order a Phal if I knew what one was.... !

Sod it I'm gonna bolt mine to a pair of Land Rovers
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Old 24th September 2010, 01:05 AM   #378
Salas is offline Salas  Greece
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Quote:
Originally Posted by RichLund View Post
Bloody hell Salas, I didn't realize there were stages in the hot-rodding process!

Would you mind giving me a run down on the component values for each stage including the expected mA for each stage.

So -

stage 1 = 10R (80mA?)

stage 2 = ?

Etc

Thanks
Stage 0 = circa 75-85mA Ecological and cool. Smart car territory, the twin 47R 1W marked on the Blue and no or mini sinks will do.

Stage 1 = circa 200mA. Boosted enough, all purpose, some logical sinks. Standard Blue HR, Golf GTI territory. 4W dissipation per rail. 10R 5W.

Stage 2 = circa 600mA. Increased grip and pull back, Porsche stuff. 12W dissipation per rail. Sinks like for a 30W class A/B amp. 3R3 5W.

Stage 3 = circa 2A. No holds sense, Enzo feel. 40W dissipation per rail. F5 size sinks & Tx. 1R 12W.

And then the fire department comes and locks us up. When we climb down the court stairs after fined by Kyoto, polar bear activists spray paint us. Only benefit, we have met Paris Hilton in the court.


edit: Note that the currents can vary from build to build due to different Vf Leds (color, brand, batch) and Mosfet VGS tolerances. The above example values are nearer to green 2V+ forward drop Leds. For red Leds, stage 1,2,3 could be 8.2R, 2R2, 0.56R ballpark.
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Old 24th September 2010, 01:10 AM   #379
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Thanks Salas.

I'm thinking of replacing the resistors with wire links and melting a hole to the earths core. I'll listen to the amp wearing full protective clothing and wrapped in a fire blanket....

Then again I'll start with the 10R's...

Cheers mate
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Old 24th September 2010, 02:40 AM   #380
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Quote:
Originally Posted by Salas View Post
Stage 0 = circa 75-85mA Ecological and cool. Smart car territory, the twin 47R 1W marked on the Blue and no or mini sinks will do.

Stage 1 = circa 200mA. Boosted enough, all purpose, some logical sinks. Standard Blue HR, Golf GTI territory. 4W dissipation per rail. 10R 5W.

Stage 2 = circa 600mA. Increased grip and pull back, Porsche stuff. 12W dissipation per rail. Sinks like for a 30W class A/B amp. 3R3 5W.

Stage 3 = circa 2A. No holds sense, Enzo feel. 40W dissipation per rail. F5 size sinks & Tx. 1R 12W.

And then the fire department comes and locks us up. When we climb down the court stairs after fined by Kyoto, polar bear activists spray paint us. Only benefit, we have met Paris Hilton in the court.
And who the hell said that diy'ers don't have a sense of humor

Thanks for the advice, will start with stage 1 and commence gradually. But honestly I don't think I will ever reach stage 3 with F5 heatsinks for a buffer!

Anand.
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