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 Post subject: Collins 75A-1 Product Detector mod
PostPosted: Apr Thu 12, 2018 3:54 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 10
Location: Denver, CO USA
I have a 75A1 Collins that has/had a mod involving replacement of V-11 (6SJ7) with a 6SA7; the original tube-socket is rewired with new components, and with the index key broken off of the NEW tube, it's inserted off-index. I'm told it was a product-detector mod. Does ANYBODY have any info on this, or can tell me where to find any documentation, so I can fix it, or put it back the way it was. Tom


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