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GB for Salas Folded Simplistic Phono PCB

The 389 and 109 "duals" are not that well matched.
Look at the spec.
Look at the duals you have and measure the Idss and gm, or compare in an LTP jig. I have done this. They vary a lot. I can get far better matching using singles and carefully measuring them in an LTP jig.
It is a bit of luck to find "well matched" pairs inside a dual.
Where the duals are very good is for Thermal Coupling.
 
Just like me. I paid 11/9 . But I am glad I do not have Teabags job .

I made payment at 16/9 but today i received another invoice with same amount.

Well if you did not pay via invoice, then the invoice remains outstanding until I cancel it.
Some of you asked for updated invoices, and I forgot to cancel a few. It should all be fine. If you overpaid, let me know.