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vintage_8bit · 10th Oct 2021, 2:56 pm

Nick. Both sides are good thankfully. I did scope the output previously with a sinewave input and the output looked clean, with no crossover distortion.

Bill. The 220K anode load is 240K. Which is well in tolerance. What I did notice & at the time I assumed it was a factory change as it looks original, is R9 & R7 are both 57K. Parts list calls up 47k hi-stab. Colin

10th Oct 2021, 2:56 pm	#24
vintage_8bit Heptode Join Date: Feb 2013 Location: Rainham, Kent, UK. Posts: 525	Re: Pye, Black Box Mk1 1954, cartridge. Nick. Both sides are good thankfully. I did scope the output previously with a sinewave input and the output looked clean, with no crossover distortion. Bill. The 220K anode load is 240K. Which is well in tolerance. What I did notice & at the time I assumed it was a factory change as it looks original, is R9 & R7 are both 57K. Parts list calls up 47k hi-stab. Colin