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thanks for your help. I found the documentation the previous owner
did, and he used half of a 6sn7 in replacement of the 6j5 bfo tube and labeled it an "inf. imp. detector. what would be the advantage of doing this? Also, Johns sx-28 restoration (and others) are the most incredible restorations i have ever seen documented. Thanks for the links! I've got a working sx-28 on loan to help in comparing/restoring mine. |
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