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Old 18th Jan 2012, 10:24 pm   #120
Pepelephew
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Join Date: Nov 2011
Location: Prosperous, Co. Kildare, Ireland.
Posts: 176
Default Re: Bush AC34, no sound.

Graham,
voltage readings, black to chassis, red to pin.

UY41
Pin 1 brown. 158.6 VAC (Heater)
Pin 2 red 257.5 VDC (Anode)
Pin 7.red 318.8 VDC (Cathode)
Pin 8 brown 116.1 VAC (Heater)

UL41
Pin 1 brown 116.2 VAC (Heater)
Pin 2 blue 319.5 VDC (Anode)
Pin 4 green 378.3 mV (Spare pin used to terminate grid stopper resistor)
Pin 5 red 182.7 VDC (Screen Grid)
Pin 6 298.1 mV (Control Grid)
Pin 7 yellow (Cathode)
Pin 8 brown 98.4 VAC (Heater)

Bill

Last edited by Station X; 18th Jan 2012 at 10:32 pm. Reason: Electrode designations added.
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