Forums - Left Side Oscillation

Rivieraranch

Seasoned Member

Posts: 2126

Left Side Oscillation
02/22/16 at 16:45:29

I am experiencing a stubborn oscillation on the left side of the amp. It is a click click click sound clearly audible close to the speaker and even from a sitting position somewhat. I tried changing all the tubes from the right side of the amp to the left and the sound persists. When the tubes that were on the left are placed on the right there is no oscillation on the right. I tweaked the connections. What else should I look for?

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MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s

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Archie Seasoned Member Posts: 2731	Re: Left Side Oscillation Reply #1 - 02/22/16 at 17:21:06 Is the click sound independent of volume?
Back to top	ZLC Technics 1200G TT w/ Ortofon Jubilee MC cart ZMC1 ZP3 (25th A Mods) ZR2 (25th A Mods) CSP3 (25th A mods) ZMA (25th A mods) Homemade Big Betsy Speakers (F15s) Silver Cabling DIY Isolation platforms under amps & TT. IP Logged

Rivieraranch Seasoned Member Posts: 2126	Re: Left Side Oscillation Reply #2 - 02/22/16 at 17:23:19 The volume has no effect on the sound.
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Archie

Seasoned Member

Posts: 2731

Re: Left Side Oscillation
Reply #3 - 02/22/16 at 17:33:28

I asked because I've been having a left channel issue with my ZMA. It's been as bad as a constant really loud noise with the meters pegged at the top to a slight popping or crackling. When this later happens the meters just jump, and together. Lately it's been fine. Steve thought it was a tube issue and that I fried the left output tubes when the meters pegged but they seem to be fine after all. I even had the popping with different output tubes altogether. I have no clue what's going on or if it's a real problem or some transient ghost. But whatever it is, I think it's in the amp and not the tubes.

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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.

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Rivieraranch Seasoned Member Posts: 2126	Re: Left Side Oscillation Reply #4 - 02/22/16 at 18:06:25 I'm afraid it is the amp with this issue, too.
Back to top	MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s IP Logged

Archie

Seasoned Member

Posts: 2731

Re: Left Side Oscillation
Reply #5 - 02/27/16 at 00:53:05

Rivieraranch,

I've been corresponding with Steve over my popping issue and he suggested that one of the input tubes must be funky. Low and behold, when I swapped input tubes the noise switched to the right channel. I think I was thrown off by looking at the output meters and thinking that it had to be an output tube, if a tube at all.

So, good news other than I need to get a new pair, at least. Maybe yours is the same problem?

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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.

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Rivieraranch Seasoned Member Posts: 2126	Re: Left Side Oscillation Reply #6 - 02/27/16 at 03:00:56 I already swapped the input with another tube and the oscillation persists.
Back to top	MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s IP Logged

Archie Seasoned Member Posts: 2731	Re: Left Side Oscillation Reply #7 - 02/27/16 at 17:37:40 Darn. Well hopefully it's not the amp. Steve was confident that my trouble was not in the amp and although I doubted him, fortunately, he was right. I don't know if you've reached out to him yet but I did send him this Forum link.
Back to top	ZLC Technics 1200G TT w/ Ortofon Jubilee MC cart ZMC1 ZP3 (25th A Mods) ZR2 (25th A Mods) CSP3 (25th A mods) ZMA (25th A mods) Homemade Big Betsy Speakers (F15s) Silver Cabling DIY Isolation platforms under amps & TT. IP Logged

Rivieraranch Seasoned Member Posts: 2126	Re: Left Side Oscillation Reply #8 - 02/27/16 at 18:53:09 I can't understand what happened. I switched tubes again to some Jap 6922 gold pins '60's Westinghouse and NO OSCILLATION!!!!
Back to top	MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s IP Logged

Archie Seasoned Member Posts: 2731	Re: Left Side Oscillation Reply #9 - 02/28/16 at 01:13:12 Good news! I'm trying to track down the exact tube causing the noise in my system and now I can't get it to make noise!
Back to top	ZLC Technics 1200G TT w/ Ortofon Jubilee MC cart ZMC1 ZP3 (25th A Mods) ZR2 (25th A Mods) CSP3 (25th A mods) ZMA (25th A mods) Homemade Big Betsy Speakers (F15s) Silver Cabling DIY Isolation platforms under amps & TT. IP Logged

Rivieraranch

Seasoned Member

Posts: 2126

Re: Left Side Oscillation
Reply #10 - 01/09/17 at 02:00:14

I have been trying to use different inputs for the MK IV. Now the oscillation returned. The Japanese Westinghouse 6922 oscillates in the left input position. The tube that does not oscillate in the left side is the JJ ECC88. I have several other alternatives but when I try them they all oscillate in the left channel. I am wondering it if is something with the pins making proper contact.Who knows. It might be something in the left side amp that is finicky about what tubes.

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MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s

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Rivieraranch

Seasoned Member

Posts: 2126

Re: Left Side Oscillation
Reply #11 - 04/01/17 at 14:51:13

Now I just discovered that this oscillation was caused by my router, which was positioned close to the speaker on the left side.
How did I arrive at this? I was reading the owners manual for the Zen UFO and noted something about router. Then right before I fell asleep last night it occurred to me that I should take a look at this. Once I woke this morning I turned the Torii on and pulled the power cord from the router and voila! the speaker was completely quiet. Mystery solved

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MINI TORII & ZROCK2 both anniversaried; 'Lil Audio F-15; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580s

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mark58 Seasoned Member Posts: 5647	Re: Left Side Oscillation Reply #12 - 04/01/17 at 15:26:21 That was an easy fix..ha
Back to top	"The man that hath no music in himself, nor is not moved with the concord of sweet sounds, is fit for treasons, deceptions, and spoils; The motions of his spirit are dull as night and his affections dark as Hell. Let no such man be trusted." William Shakespeare IP Logged

Stefan Seasoned Member Posts: 119	Re: Left Side Oscillation Reply #13 - 03/31/18 at 21:32:59 Thank you so much for posting this!!! I had the same issue lately and thought it may be the power supply, but also turned out I put a new router into my rack too close to the Torii, moved a way a bit and the oscillation stopped!
Back to top	- Stefan --------------------- Rega rp6, Lounge Audio phono pre-amp, Lonely Raven PC, T+A DAC 8 DSD, ZBIT, ZROCK2+25th, SE84UFO25, Torii IV, Denon AVC-1SE, Infinity IRS Beta, Tannoy Cheviot, ERRx, Tiny Radials, Woo WA-3, Sennheiser HD800S IP Logged