OK, you have an AVO Valve Tester... but without...

The AVO VALVE TESTER Instructions

...it's completely USELESS because you don't have the information that tells you how to use it or set it up for any particular valve (tube).  Yes, you can fiddle the knobs to your hearts content, but it's meaningless and if you get the settings wrong you will almost certainly get a false result at best and damage the valve you are trying to test (and perhaps even hurt yourself in the process) at worst.

This DVD (or USB) contains a collection of DOCUMENTATION and INSTRUCTIONS (schematics and other Technical Data) for the...

AVO VCM mk1/mk2
AVO VCM mk3
AVO VCM mk4
AVO CT160

Additionally you also get a copy of the 1958 Valve Data Manual to start you off with testing your valves.

Absolutely NO RETURNS (on the basis that the media is easily copied) and you are buying on this understanding.

Choose what way you would like to receive your Manuals and get FREE DELIVERY to your UK Door.  

Supplied on a plain DVD for the no-frills budget conscious, supplied in a paper sleeve.
Or on a printed DVD in a plastic hard storage case
Or on a USB Stick for those that don't have access to a DVD player.