V7 is ___________
When making pin-to-ground resistance measurements, make SURE the radio is configured like this. To locate tubes, see this.
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.
#5a is before rework, #5b after
Pin to Radio Radio Radio Radio
chassis #5a #6 #7 #5b
1 0 .2 0 1
2 0 0 0 0
3 61,500 300 40,000 open
4 780,000 390,000 45,000 500,000
5 775,000 390,000 45,000 500,000
6 974 60,000 10,000 180,000
7 0.1 0 .2 .2
8 .1 0 .1 .01
top cap ? 100,000 95,000
Pin to From the
chassis docs
1 0
2 0
3 47,000
4 450,000
5 450,000
6 10,000
7 0.1
8 0
top cap ?
Tube pinout images are found on tdsl.duncanamps.com
For reference:
Page: /V7/V7_new.shtml
Last modified: Monday, 1 Jun 2026