OPA2277 Pre Amp Kit Pt 1
26:43
OPA2277 Pre amp Part 2. Test and comparison to other Op Amps.
18:17
Stop Wasting Money on New Batteries! Restore Old AA Batteries Today!
18:58
Accuphase C3850 clone class A Pre Amp Kit. Evaluation and Test.
21:09
The History of the Tektronix Corporation
43:52
Mend It Mark The £25,000 Pre Amp that went Wrong Tom Evans Mastergroove SR mkIII
37:41
I keep making the same mistakes
25:09
NE5532 Tone control preamp Kit.
13:29