You don't.
You buy the PCBs from the diyAudio store. I hope they have them in stock.
I have a question about C2. the BOM and build guide says 270pF polystyrene cap.
But i can only find 220pF and 330pF of polyester, polystyrene and of polypropylene. the only ones i can find in 270pF is mica. so how crucial is this value? or is it a typo?
PS: my shopping cart is at RSonline, so i will not order just that one part from mouser or digi key.
But i can only find 220pF and 330pF of polyester, polystyrene and of polypropylene. the only ones i can find in 270pF is mica. so how crucial is this value? or is it a typo?
PS: my shopping cart is at RSonline, so i will not order just that one part from mouser or digi key.
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Hi AudioSan,
Buy some loose tolerance 330pF and test them to see if you get a value closer to 270 pF There is no point in buying almost exactly the wrong value in a close tolerance part. Polystyrene or polypropylene would be fine, avoid the others you have listed.
Another option, do they have a 270 pF in a ceramic capacitor? As long as it is C0G or NP0, it will sound good.
-Chris
Buy some loose tolerance 330pF and test them to see if you get a value closer to 270 pF There is no point in buying almost exactly the wrong value in a close tolerance part. Polystyrene or polypropylene would be fine, avoid the others you have listed.
Another option, do they have a 270 pF in a ceramic capacitor? As long as it is C0G or NP0, it will sound good.
-Chris
I got a hold of some Wima polypropylene caps. I'm looking forward to the day all of this expenses are done. total build cost for this amp is about $2200.
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Why? I'd also regard a mica cap as appropriate, at least as far as it fits into the PCB.
Best regards!
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