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Here is a little tube substitution guide published by Canadian General Electric back in 1943. Due to its age, the substitution options are limited by the very fact that there were nowhere near as many vacuum tubes as appeared in the post war years.

It may come in handy though, so feel free to download it by clicking HERE.

If you do not have the ADOBE READER installed on your computer you can get it free by clicking on the icon below.

The part about this guide that I most appreciate is the artwork on the rear cover...patriotic eh?

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