Quote:
Originally Posted by roberts54
I also cannot see the Radio Museum images clearly enough to know if they would help with the key valve question so don't want to spend $25 on a further gamble if I can help it.
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Click on the image then click on the larger image to produce an even larger one. You can the then use the '+' button to zoom in.
As for alternative valves, go to this site to compare them:-
http://www.r-type.org/
http://www.r-type.org/exhib/abv0037.htm