30-11-2021, 06:43 PM
(This post was last modified: 30-11-2021, 06:45 PM by Mike Watterson.)
Someone has made a mistake. The pot body can't be connected to the "earthy" end of the pot unless that wire below (to shared cathode resistor) is missing.
I looked at the photos I took of my chassis and cropped out this part.
I don't see a link to the pot casing. It would make no sense.
There is no evidence of solder on the casing. There is no screen connected at the pot. The visible pale brown fat wire in the foreground is surely the "earthy" end. I suspect the visible yellow cap is C20 (Trader numbering).
Such a strange arrangement would be mentioned on Trader Sheet 1002.
Either someone got at it or it's an original mistake. Certainly it may have worked somewhat with a strong signal. R8 & R13 (Trader) might ensure the valves are not damaged, unlike shorting the cathode resistor on an output stage.
I looked at the photos I took of my chassis and cropped out this part.
I don't see a link to the pot casing. It would make no sense.
There is no evidence of solder on the casing. There is no screen connected at the pot. The visible pale brown fat wire in the foreground is surely the "earthy" end. I suspect the visible yellow cap is C20 (Trader numbering).
Such a strange arrangement would be mentioned on Trader Sheet 1002.
Either someone got at it or it's an original mistake. Certainly it may have worked somewhat with a strong signal. R8 & R13 (Trader) might ensure the valves are not damaged, unlike shorting the cathode resistor on an output stage.
