Although I have been a member of the list for a while now, this is the first
time that I have tried to post to it, so I hope that I have done this
correctly!
My question is that I have seen 6JB6A (vs. straight 6JB6) tubes listed
for sale. I am wondering what difference(s) there are between the two and if
eigther is suitable for use in the T4X series (or TR4s). Also, is a fairly
close reading in mutual conductance ( ie. on my Heathkit TT1) consider as
indicating a true match on the tubes? Mike, KB1EZL
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