[Teknofossil58]

Hello. Are there any recommended opamp upgrades for the old FET 3 Dynaco Pat 5 mod? Original chips are TL071 types.

Thanks! Tom

[avahifi]

OPA 627 chips might work.  I would need to see a sharp close up photo of the chip area of the pc board to advise further.

Email me at frank@avahifi.com for faster responses.  I don’t check here at AC every day.

Frank