Re: Why Both EAA91 and EB91?
To perhaps put the cat among the pigeons, I think there are other equivalents of the EB91/6AL5, etc.. I have a number of valves that I bought as EB91 equivalents that are labelled with the Mullard logo and bear the numbers M8212 and CV4025. Are these just ruggedised or maybe special quality?
Colin.
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