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Old 5th May 2012, 10:16 AM   #681
AndrewT is offline AndrewT  Scotland
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Daniel, like the Badger, has come out of hibernation when it's still too cold.
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Old 5th May 2012, 11:23 AM   #682
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by danielwritesbac View Post
.................2SC3503C is discontinued. KSC3503C is discontinued. KSC3503D is not discontinued but I don't know if it is okay to substitute, and I don't know what other substitutes there may be for these low availability types.

KSA1381C is discontinued. KSA1381E is not discontinued, but I don't know if it is okay to substitute, and I don't know what other substitutes there may be for these low availability types.

SC3503 and SA1381 are a pair and HFE match is currently unavailable, but I don't know if that factor is important....................
diyAB Amp - The "Honey Badger"

What about asking Sonnya?
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Old 5th May 2012, 12:01 PM   #683
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Quote:
Originally Posted by AndrewT View Post
diyAB Amp - The "Honey Badger"

What about asking Sonnya?
Yes, Sonnya, the stockman!
A quick way to have a working prototype to figure out the results is to salvage some used 2SC3503 from old CRT monitors, if still available around. There are lots of these parts there.
I have done this with success many times.
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Max.
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Old 5th May 2012, 08:38 PM   #684
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Default Remove the barrier to using boards? A: Bundle any problem device.

Quote:
Originally Posted by AndrewT View Post
diyAB Amp - The "Honey Badger"
What about asking Sonnya?
I'm curious about having low availability devices available bundled with the boards. After a quick check of Mouser, Digikey, Newark, RS, Allied, then it would be clear which devices are a barrier to using the boards. Then it would be ever so good to bundle those rare devices with the boards thus removing the barrier to using the boards.
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Old 6th May 2012, 09:45 AM   #685
AndrewT is offline AndrewT  Scotland
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The 300Vceo rating is not required for this amplifier.
If that is reduced to 150Vceo to 200Vceo, then you will find many other Sanyo devices that can match the 2sa1381 performance.
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Old 6th May 2012, 11:04 PM   #686
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So unsatisfied Dee-Axe is back.
What about OS???
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Old 14th May 2012, 03:37 PM   #687
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How much heatsink would I need for this project? If I were to account for it running full throttle continously (150W/8R), would 0.5C/W per channel suffice?
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Old 23rd May 2012, 11:38 PM   #688
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anyone received their boards yet ? almost 3 weeks since i ordered mine . wondering if i should be worried .
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Old 24th May 2012, 12:46 AM   #689
SoIL4x4 is offline SoIL4x4  United States
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Quote:
Originally Posted by Woody1911a1 View Post
anyone received their boards yet ? almost 3 weeks since i ordered mine . wondering if i should be worried .
I have not, but I ordered on the 11th so not quite two weeks for me. I was getting curious though if anyone who ordered the first day had received theirs yet. International shipping will make you feel like a kid waiting for christmas.
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Old 24th May 2012, 09:43 AM   #690
Jason is offline Jason  Australia
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Woody / SoIL - please contact the helpdesk with your order number and we'll get you a status update. From memory, Royal Mail says 5-7 working days from London to any international location but country specific customs can slow things down.

Also, the official build guide should be out in the next few days at the latest.

Last edited by Jason; 24th May 2012 at 09:46 AM.
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