"Always open to new experiences" You're a wild man, Stefan. Brought a smile to my face. 😊

Best job!!

Thank you Stefan for another interesting video. Some truly bizarre design choices were made for this unit! Sounds like we haven't seen them all yet. I am very interested to see how it performs once all repairs are completed. Regards, David

In all the amplifiers I've fixed that had blown finals, I'd say about 80% were due to a shorted speaker wire and 20% were due to thermal runaway because the compound had dried up and the amp was pushed hard at a party. This one may also have oscillations. Oh yes, I've seen outputs blow because the speaker used piezo tweeters without any current limit resistor. Those tweeters can measure less than 1 ohm at 30KHz and present a short to the finals if the amp oscillates or has program material fed into it. We can't hear that high, so the operator would never know until a fuse opened....IF it opened. LOL 73 Stefan. Looking forward to PT3 👍

Beautiful Goerz multimeters! Or are they BBC or Gossen branded?

i'm really curious about the total harmonic distortion of this amplifier. It should be super low or inexistent.

Hello Stefan! Great also on audio frequencyes, not only RF equipment, 73 I1WSM

🙂👍

Why did they use the same supply for both left and right preamps? I'd would have thought it would be easier to design each channel independently and just replicate them. But I guess this is the magical world of MF....

I'll venture you'll most likely see something even more poorly mechanically designed as the cap placement in this one at some point! ;-)