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ZMA Regulator Tubes (Read 3574 times)

HockessinKid Seasoned Member Offline Posts: 1362 Delaware	ZMA Regulator Tubes 05/08/19 at 16:56:28 Can one substitute OA3 regulator tubes on the ZMA? Any suggestions here based on experience, I'm curious about the OD3W tubes. HK
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Lon Seasoned Member Offline "Love without guts is worthless!" Philip K. Dick Posts: 28430 Munson Township, OH	Re: ZMA Regulator Tubes Reply #1 - 05/08/19 at 17:36:10 HK, doesn't look likely. According to the manual, there's no substitution for these tubes: https://www.decware.com/newsite/ZMAmanual.pdf Tube Substitutions STOCK Alternates KT66 KT77, KT88, 7027, 5881, EL34 6N23P 7DJ8, 6N1P, 6922, 6DJ8 OA3 None
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Carlsbad Seasoned Member Offline Posts: 206 carlsbad, ca	Re: ZMA Regulator Tubes Reply #2 - 12/15/22 at 04:37:09 There is a russian equivalent that sounds very good, SG2S. Also, Steve has condoned using OB3 which is a 90V regulator (OA3 is 75 V). I admit I don't know exactly how this fits into the circuit. I ahve tried several and went back to OA3. Jerry
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