olrs
New Member
Delta 88 x 4
Posts: 45
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Post by olrs on May 2, 2022 18:56:04 GMT -7
Hi all, need to replace the KT88s in my Delta and given the global tube shortage I haven't been able to get my hands on any KT88s. I do, however, have some matched 6550s. Has anyone had any luck with those or similar in their Delta? Any biasing considerations with those tubes?
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Post by frankie on May 3, 2022 10:36:13 GMT -7
They will sound a little different but be fine. No bias considerations. Delta's sound best to us lower around 31-32mA a tube since you are pushing a lot of gain through the front end with the EF86. You can obviously go hotter with the big bottles though.
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olrs
New Member
Delta 88 x 4
Posts: 45
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Post by olrs on May 3, 2022 16:19:19 GMT -7
They will sound a little different but be fine. No bias considerations. Delta's sound best to us lower around 31-32mA a tube since you are pushing a lot of gain through the front end with the EF86. You can obviously go hotter with the big bottles though. Thanks!
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