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Mini Torii Hum in One Channel (Read 1556 times)
mberger0001
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Mini Torii Hum in One Channel
11/04/19 at 17:26:01
 
Hi,
My Mini Torii has a hum out of one channel. I cleaned everything and switched my tubes but the hum stayed on the same side. Does that mean it is a part inside that is causing my problems? I also switched my speaker cables side to side and that moved that hum to the other channel. That must mean it is a part inside?
m
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Donnie
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Re: Mini Torii Hum in One Channel
Reply #1 - 11/04/19 at 17:48:26
 
You changed every tube side to side?
I would look at cable routing, sometimes it ends up being a power supply cable being too close to a RCA.
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lazb
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Re: Mini Torii Hum in One Channel
Reply #2 - 11/04/19 at 19:16:18
 
be sure and switch the input leads to verify it is not coming from upstream of the amp.
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #3 - 11/04/19 at 19:21:37
 
Yeah. I disconnected my interconnects and still get the hum.
m
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #4 - 11/04/19 at 19:23:30
 
I started by switching the input tubes, then output tubes, then just kept going one at a time until i did them all. Unfortunately a tube was not the problem.
m
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Steve Deckert
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Re: Mini Torii Hum in One Channel
Reply #5 - 11/05/19 at 02:41:39
 
How loud is the hum?

Does it do it with the volume control all the way down?

Did you also swap the rectifier tubes during your testing?

Are the feedback controls both turned fully clockwise?

-STeve

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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #6 - 11/05/19 at 03:09:44
 
I don't have feedback controls. It is not really loud. But audible everywhere in the room. That is with the volume turned all the way down. The hum does not change if I turn up the volume. I did also swap the rectifier tube.
m
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Rivieraranch
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Re: Mini Torii Hum in One Channel
Reply #7 - 11/08/19 at 14:44:59
 
So what happened?
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MINI TORII ANNIVERSARY MODIFIED; SE84UFO; ZSTAGE; MONOLITH SPEAKERS; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580 headphones
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #8 - 11/08/19 at 15:25:31
 
Nothing. I am stumped as to what it could be. I sent an email to Decware about possibly sending it in for repair. Maybe I will get some upgrades at the same time. Transfer the guarantee.
m
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jslateiv
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Re: Mini Torii Hum in One Channel
Reply #9 - 11/08/19 at 16:44:36
 
Hey M,

 In your first post you mention that when you switched the speaker cables,  the hum moved.  The hum didn't move when switching Tubes,..

That to me would indicate an issue with your cables..
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VPI Scout (SS Zephyr MIMC) > Lundahl 1933 SUT > ZP3 > Auralic Aries Mini > PSA DSD w/BridgeII > PSA BHK Pre > 25th Anniv. Zen Amp/Torii Jr./NuForce STA200/TubeLab 300B > Triangle Celius 202 / Zu Omen (Hi-Mod) : PSA P12 : Iconoclast Cabling
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #10 - 11/08/19 at 17:49:30
 
I just swapped left and right speaker and cable. The cables are soldered to the drivers. I think that means that the problem is inside the amp?
m
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jslateiv
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Re: Mini Torii Hum in One Channel
Reply #11 - 11/08/19 at 19:14:45
 
Yes,..  I see what you are saying.   It does seem likely that there is some issue in that channels circuit,  all things considered.   I would contact Steve and arrange for a send back.
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VPI Scout (SS Zephyr MIMC) > Lundahl 1933 SUT > ZP3 > Auralic Aries Mini > PSA DSD w/BridgeII > PSA BHK Pre > 25th Anniv. Zen Amp/Torii Jr./NuForce STA200/TubeLab 300B > Triangle Celius 202 / Zu Omen (Hi-Mod) : PSA P12 : Iconoclast Cabling
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jslateiv
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Re: Mini Torii Hum in One Channel
Reply #12 - 11/08/19 at 19:17:28
 
In re-reading you previous post,   when you swapped the cables,  did you move the speakers too?  If so and the hum moved,  then the prob is with your cable/driver...

try this,  take one speaker only,  hook it to the left,  then right,..  All good?  All bad?  good only on one side?   This will tell you if its the amp or cable/speaker.
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VPI Scout (SS Zephyr MIMC) > Lundahl 1933 SUT > ZP3 > Auralic Aries Mini > PSA DSD w/BridgeII > PSA BHK Pre > 25th Anniv. Zen Amp/Torii Jr./NuForce STA200/TubeLab 300B > Triangle Celius 202 / Zu Omen (Hi-Mod) : PSA P12 : Iconoclast Cabling
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #13 - 11/08/19 at 19:57:13
 
Hi jslateiv,
I tried again. Did what you said with one speaker. It is the amp. But what i noticed this time is that my good side does produce a sound at the driver if you put your ear right up to it. And it sounds just like my bad side but way quieter. The bad side of the amp is 20x louder. This is with no source connected and volume pots turned all the way down.
m
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jslateiv
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Re: Mini Torii Hum in One Channel
Reply #14 - 11/08/19 at 20:34:09
 
Sounds like a ground issue in the circuit on that one channel somewhere.  Send it back to Steve,  he'll take care of it / you.   The noise you hear out of the good channel should def. be the same/equal on the other channel.  You always hear a little tube noise but shouldn't be much and def. not enough to interfere with the music.
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VPI Scout (SS Zephyr MIMC) > Lundahl 1933 SUT > ZP3 > Auralic Aries Mini > PSA DSD w/BridgeII > PSA BHK Pre > 25th Anniv. Zen Amp/Torii Jr./NuForce STA200/TubeLab 300B > Triangle Celius 202 / Zu Omen (Hi-Mod) : PSA P12 : Iconoclast Cabling
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Donnie
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Re: Mini Torii Hum in One Channel
Reply #15 - 11/08/19 at 23:08:17
 
I don't like to get to technical, but it sounds like the "Debuzzinator" wire has ether came loose or been chewed in half by Wolverines.
Send it back immediately so that it can be fixed. Steve has a great big hammer from ACME to bonk the Wolverines on their heads.
That is my personal guess, but it could be wrong.

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jslateiv
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Re: Mini Torii Hum in One Channel
Reply #16 - 11/09/19 at 17:38:51
 
HA,..  it's def. the debuzzinator wire.  Had forgotten the technical term for that wire,  ;D    Those mini wolverines can wreck havoc if they find a way into your gear!
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VPI Scout (SS Zephyr MIMC) > Lundahl 1933 SUT > ZP3 > Auralic Aries Mini > PSA DSD w/BridgeII > PSA BHK Pre > 25th Anniv. Zen Amp/Torii Jr./NuForce STA200/TubeLab 300B > Triangle Celius 202 / Zu Omen (Hi-Mod) : PSA P12 : Iconoclast Cabling
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Rivieraranch
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Re: Mini Torii Hum in One Channel
Reply #17 - 11/12/19 at 20:57:24
 
You should update to UFO Transformers and change the caps to beeswax and include the anniversary update. You won't hardly regionalize the amp when it returns.
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MINI TORII ANNIVERSARY MODIFIED; SE84UFO; ZSTAGE; MONOLITH SPEAKERS; TECHNICS SL1200MK2 KAB MODDED TT; ONKYO 6 DISC CD; MARANTZ 2226B; SCHIIT MULTIBIT DAC; SENNHEISER HD-580 headphones
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mberger0001
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Re: Mini Torii Hum in One Channel
Reply #18 - 11/13/19 at 01:41:16
 
Where does one find the price list for updates? I looked around but could not find one.
m
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Lon
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Re: Mini Torii Hum in One Channel
Reply #19 - 11/13/19 at 03:20:48
 
Here's one of the lists:



And the other:



They're located in the thread about the modifications . . . probably would be better to have Steve locate them on the products pages. . . .hint hint.
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