UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - AVO wattage and powerfactor unit for 7's & 40's

AndyGilham · 29th Nov 2017, 5:50 pm

A little further information on the Avo Power factor units

Both the Model 1 (1951) and Model 2 (1958) used the following resistor values

The Model 7 voltage ranges used 15kohm, 15kohm and 24kohm
The Model 7 Start/Adjust pot used 100Kohm

The Model 40 voltage ranges used 4.7kohm, 4.7kohm, 8.2kohm
The Model 40 Start/Adjust pot used 35Kohm

See attached drawing.

I have the schematic as well, but can't upload it for some reason.

29th Nov 2017, 5:50 pm	#4
AndyGilham Pentode Join Date: Oct 2016 Location: Dover, Kent, UK. Posts: 235	Re: Avo wattage and powerfactor unit for 7's & 40's A little further information on the Avo Power factor units Both the Model 1 (1951) and Model 2 (1958) used the following resistor values The Model 7 voltage ranges used 15kohm, 15kohm and 24kohm The Model 7 Start/Adjust pot used 100Kohm The Model 40 voltage ranges used 4.7kohm, 4.7kohm, 8.2kohm The Model 40 Start/Adjust pot used 35Kohm See attached drawing. I have the schematic as well, but can't upload it for some reason.