Quote:
Originally Posted by dieseljeep
Do you have a sub guide?
Many times the subs listed are only close tube designs and will, only once in a while, cause a new problem. IE: the vertical hold will be critical or the lin or height won't adjust properly. The 6FD7 and the 13DF7 is a Philco designed tube.
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I do have a tube substitution guide and I saw what subs were listed for this tube and I didn't have those tubes in my collection so I just went ahead and ordered a new one over at AES it was only a $3 so it wasn't a big deal.