Thanks for your reply Alrainbow. I will check that site out.
Hafler offered an upgrade following the release of the DH102 (not sure how long after). It involved some transistor changes as well as some resistor value changes in a few spots. The upgrade called for both the transistors and the...
Hi. I hope that this question is in the right forum.
I am rebuilding a Hafler DH101 and upgrading the capacitors and replacing the resistors with metal films, etc.
I am also replacing all of the transistors and rebuilding the power supply with all new parts..
What I noticed is that there are...