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Old 30th December 2005, 04:25 PM   #1
jeapel is offline jeapel  Canada
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Default digi-key resistor ???

hi

With a parts list took on internet i order my aleph
resistor 1/2 watt 1%

exemple : PPC10.0KXCT-ND

but the resistors look very very small like 1/8 watt

is it normal or i must order other ?? or somebody with

same experience like me

thanks
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Old 30th December 2005, 05:22 PM   #2
Blues is offline Blues  United States
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Your example is a Phoenix resistor part#. I don't see a 1/2W value from the Phoenix list but if you're ordering for example a 1W/1.0k/1% it would be: PPC1D1.0kCT-ND and its body is about 10mm long and 4.3mm in diameter.
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Old 30th December 2005, 07:18 PM   #3
jeapel is offline jeapel  Canada
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on digi-key i read 1/2 watt but just 3.4 mm long ??
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Old 30th December 2005, 07:26 PM   #4
jeapel is offline jeapel  Canada
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with my lens :-) it s just 3mm long 1/2 watt tag on digikey
but i don t beleive it
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Old 31st December 2005, 01:06 PM   #5
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Believe it. They are Phoenix mini resistors. Panasonic also make some mini resistors in 1/8 and 1/4w size (also available from digikey).

Datasheet for Phoenix
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Old 31st December 2005, 04:27 PM   #6
jeapel is offline jeapel  Canada
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hi Brian thanks for the datasheet

smaller with bigger watt it s new for me maybe these resistors

are very heat resist but become very hot also or it s a new

version of thermodynamic law :-)

for aleph 3 i m right with all 1/2 watt except .47ohm 3 watt

or some resistor need more and have you pratical

experience with mini resistor
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Old 31st December 2005, 05:44 PM   #7
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They will certainly get hot if you pass the rated power though them.

Here's a pic of my Aleph30 board using Peter Daniel's boards. I used Panasonic mini 1/4W resistors and Panasonic 3W for the output.
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File Type: jpg dscn4517.jpg (71.7 KB, 221 views)
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Old 31st December 2005, 07:26 PM   #8
jeapel is offline jeapel  Canada
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thanks for help Brian but if possible have you

a part number example for your aleph 30 panasonic mini resistor

maybe mouser or digi-key
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Old 31st December 2005, 07:39 PM   #9
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I can do you one better.

Here is a downloadable spreadsheet for all the parts from DIYAmps.com (BrianGT's non-chipamp site).

Note that the part numbers (R1, R2 etc) do not directly corrispond to the NP schematic parts, but you can do the mapping. It has the Digikey part numbers for everything.
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Old 1st January 2006, 01:00 AM   #10
jeapel is offline jeapel  Canada
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good new my mini resistors are not so wrong after all

happy new year in diy hobby :-)
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