Pearl Two

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Sweet!
I was just starting to put together a parts list for the v1 Pearl.
But I can wait...

Question: what are the main differences between v1 and v2?

Question 2: can the 2SK389 be replaced with 2 matched 2SK170s?
 
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2SK389 be replaced with 2 matched 2SK170s

You don't even need to match them as they run in parallel (just like the K170-quad at the input) and not in a differential pair.

Also the quad at the input is not matched in the original article as you see from the different voltages across the source resistors - matching also not necessary or helpfull.

Have fun, Hannes