UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Boater Sam · 14th Jan 2017, 4:00 pm

If quoting resistance readings, we need to know which 2 points you are measuring between, not just one. But that sounds OK for across the transformer whole winding, ie. 250v tap to 0v (ground) end.
Using unused pins on valve holders as junctions for components is common practice, the CY31 valve has no connection on these #1 &#3 pins. If in doubt, consult the valve data and it will become clear. Many octal valves are missing pin 6 altogether!
Try to follow the circuit diagram, not a physical layout which often will confuse you. The layout of components fitted in a chassis bears no relation to the position on the circuit, but the point to point connections are as the circuit diagram.

14th Jan 2017, 4:00 pm	#46
Boater Sam Banned Join Date: Dec 2013 Location: Middlewich, Cheshire, UK. & Winter in the Philippines. Posts: 3,897	Re: Bush A.C.91 If quoting resistance readings, we need to know which 2 points you are measuring between, not just one. But that sounds OK for across the transformer whole winding, ie. 250v tap to 0v (ground) end. Using unused pins on valve holders as junctions for components is common practice, the CY31 valve has no connection on these #1 &#3 pins. If in doubt, consult the valve data and it will become clear. Many octal valves are missing pin 6 altogether! Try to follow the circuit diagram, not a physical layout which often will confuse you. The layout of components fitted in a chassis bears no relation to the position on the circuit, but the point to point connections are as the circuit diagram.