02-23-2021, 11:02 PM
Please keep us posted how the JJ tubes work out for you. From what I have read elsewhere, JJ tubes do not seem to have a great reputation. I hope that is incorrect as I have three Fishers that use 7591 outputs, and the JJs are significantly cheaper than the Russian Tung-Sols (which apparently have become the "standard" in new manufacture 7591 tubes).
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Ron Ramirez
Ferdinand IN