V3

V2 is in the mixer module.

When making pin-to-ground resistance measurements, make SURE the radio is configured like this. To locate tubes, see this.

Early Radio Resistance Measurements

Resistance measurements made with Simpson 260.
"Open" or "no pin" means the tube does not use the pin but it might have been used as a junction for other components.

		Pin to        Radio        Radio      Radio
		chassis         #5          #6          #7

		1               0            0           0

		2               0           0.4          0

		3            18,630        49,000      18,000

		4             2,150        49,000      11,000

		5            62,400        56,000      50,000

		6             436           420         390

		7               0           .2          0.2

		8            760,000      900,000     900,000
	

Late Radio Resistance Measurements

		Pin to       From the
		chassis        docs

		1               0

		2               0

		3             18,000

		4            400,000

		5            400,000

		6             10,000

		7              0.1

		8              200

	

Notes

Reference

Tube pinout images are found on tdsl.duncanamps.com

For reference:


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Last modified: Monday, 1 Jun 2026