[split] Valve testers

[Ed_Dinning]

Hi Rob, a further extension of valve testers for the audio enthusiasts would be to ad a variable audio source and run the output through a computer sound card.
This will give a good indication of distortion levels at various drive levels. It can also be used to check intermodulation distortion.

This is an extension of the scheme using fixed frequency injection on the AVO VCM's

Ed