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Ringing Rectifiers (Read 794 times)
Rivieraranch
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Posts: 1267
Ringing Rectifiers
11/28/12 at 01:59:59
 
I have tried two sets of Sylvania 5U4G rectifiers in my TORII MK III and both sets exhibit mechanical noise and a slight medium pitched ringing. It sounds like water running through a pipe or hose. I pulled the second set out and substituted some Svetlana Winged C rectifiers. They are quiet as sin in there.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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will
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Posts: 1089
Re: Ringing Rectifiers
Reply #1 - 11/28/12 at 04:12:35
 
Weird. I have never run into this with a NOS rectifier. My original Rubys sounded sort of like an internal mechanical vibration/rattle of fine metal against something...sort of tinsely if I recall. Definitely irritating.

Asked Steve on those and he said it would probably pass as the new tube works in, and it did.

Are they true NOS, the same year and so on, or same tube altogether.
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« Last Edit: 11/28/12 at 04:36:43 by will »  

Mac mini, Tranquility DAC, modded Oppo 83, TORII MkIV, MorrowAudio SP7 cables, HR-1s...VHaudio DIY, Grover, MAC ICs...PI Audio Uberbuss...PI, VHaudio DIY, Neotech DIY, Cryoparts DIY power cables, HerbiesAudioLab feet and tube dampers
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Rivieraranch
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Posts: 1267
Re: Ringing Rectifiers
Reply #2 - 11/28/12 at 11:38:27
 
I think they were all used. In fact, I'm sure of it. They had marks on the bottom of the base, which usually means they were pulled. One set is a matched pair with same date codes. The other are similar but both with bottom getters. I agree that the sound is "tinsely" with these, too. The Russians make no noise at all.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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will
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Posts: 1089
Re: Ringing Rectifiers
Reply #3 - 11/28/12 at 14:55:58
 
Odd to get 4 with the same issue! Sounds like the same thing I had, but these being used, I wonder if this is just bad. Can't say from experience. I have quite a few Sylvania 5U4GB (no 5U4GB-ST), and all are fine. I like their sounds in general too. Nice choices for fine tuning.
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« Last Edit: 11/28/12 at 14:58:45 by will »  

Mac mini, Tranquility DAC, modded Oppo 83, TORII MkIV, MorrowAudio SP7 cables, HR-1s...VHaudio DIY, Grover, MAC ICs...PI Audio Uberbuss...PI, VHaudio DIY, Neotech DIY, Cryoparts DIY power cables, HerbiesAudioLab feet and tube dampers
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