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sobell1980 · 8th May 2016, 3:22 pm

Continuing on from post #134 so members are able to follow on more easily with what tests and progress have been done today if but in dribs and drabs when time allows. I have tested the current draw on anode of V4 and it is 52 mA . This is with the tone control disconnected and 240k ohm resistor fitted in it's place across the the two tone control wires. This remains a constant and steady 52mA with the resistor in place regardless of volume control.
Anode current with the resistor removed is approx 42mA max volume and decreases and increases with volume control. Apart from goping over my wiring of previous stages I've kind of hit a brick wall at the moment. Just hoping if anyone can elaborate on my readings and findings. Many thanks,
Dave.

8th May 2016, 3:22 pm	#136
sobell1980 Octode Join Date: May 2011 Location: Bromyard, Herefordshire, UK. Posts: 1,241	Re: HMV 653 Broadcaster all wave. Continuing on from post #134 so members are able to follow on more easily with what tests and progress have been done today if but in dribs and drabs when time allows. I have tested the current draw on anode of V4 and it is 52 mA . This is with the tone control disconnected and 240k ohm resistor fitted in it's place across the the two tone control wires. This remains a constant and steady 52mA with the resistor in place regardless of volume control. Anode current with the resistor removed is approx 42mA max volume and decreases and increases with volume control. Apart from goping over my wiring of previous stages I've kind of hit a brick wall at the moment. Just hoping if anyone can elaborate on my readings and findings. Many thanks, Dave.