HP97: Who was the killer (resistor or transistor)?

[Dieter]

(12-04-2016 10:54 PM)vk6ti Wrote:  I bet that Gundig sounds good, terrible to work on, but a marvel of 60's German engineering

Err... that's a whole decade earlier (1954). ;-)
German audio engineering of the Sixties was a completely different story.
For a first impression take a look at some pictures of the Braun Studio 1000 series.

Dieter