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Static interference from one of my SE84UFO (Read 370 times)
Geno
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Static interference from one of my SE84UFO
05/18/24 at 19:16:52
 
What do you folks make of this static?  It does not do this all the time, and what you are hearing is worst case scenario(and my iPhone microphone makes it sound louder than it really is)

I listened this morning, and the static was barely audible. Iím hoping that the Snubway I ordered will help with this.

https://youtube.com/shorts/PbMckKldkCI?si=CI17ViaY6a7ct-nx

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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222/Zbit
Cambridge Audio CXN(ModWright)
Crown XLS-1002 Sub Amp
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart ē Darlington Labs MP-8b
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in Open Baffles
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will
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Re: Static interference from one of my SE84UFO
Reply #1 - 05/18/24 at 20:25:41
 
Geno. In my experience anyway, this does not sound like noise something like the snubway would solve. The steadiness seems pretty intense, but I have heard this sort of static with a tube going, or from the tube socket having gotten loose, so a weak connection. If it is the latter, you may be able to tell if you gently turn the input tube (usually the culprit for me) in its socket to put more tension on the pin/socket connection, using a rag or something to protect your fingers, and see if it changes. Amp off and discharged, I have carefully tightened my tube sockets at times, with small sharp tool, especially for the small tubes like the inputs, I think I straighten out one of those dental picks to do it... been a while.
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CAJames
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Re: Static interference from one of my SE84UFO
Reply #2 - 05/18/24 at 20:27:28
 
Sounds like tubes to me. Have tried swapping all the tubes between your two amps to see if the noise follows?
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[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
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Geno
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Without music, life
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Re: Static interference from one of my SE84UFO
Reply #3 - 05/18/24 at 20:50:28
 
Thanks Will and James.

I will try swapping tubes between amps first, and see what that does. The noise is coming from my newer amp, at the moment.

After experimenting, Iíll report back.

Thanks guys,

Geno
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222/Zbit
Cambridge Audio CXN(ModWright)
Crown XLS-1002 Sub Amp
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart ē Darlington Labs MP-8b
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in Open Baffles
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Geno
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Without music, life
would be a mistake.

Posts: 2073
Re: Static interference from one of my SE84UFO
Reply #4 - 05/19/24 at 00:21:42
 
Swapped the input tubes around. This isolated it to one tube causing the noise.

The bad thing is, the input tubes are Wathen Cryoed e88cc, at $120 a pop.

One is about 18 months old, and the other is about a year old. I have no idea which is which.
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222/Zbit
Cambridge Audio CXN(ModWright)
Crown XLS-1002 Sub Amp
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart ē Darlington Labs MP-8b
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in Open Baffles
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CAJames
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"I've run every
red light on memory
lane."

Posts: 1863
Re: Static interference from one of my SE84UFO
Reply #5 - 05/19/24 at 00:49:24
 
My condolences Geno, sorry for your loss. This is of course the flip side of high dollar tubes: they donít last forever.
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[FOOBAR2000 | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Maple-tree Phono 3E
Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC
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will
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Re: Static interference from one of my SE84UFO
Reply #6 - 05/19/24 at 02:00:48
 
Isn't longevity a big part of the Wathen cryo pitch? I recall it that way when they first started to be talked about anyway... that their process causes tubes to last extra long... With a lot of good NOS inputs purported to last 5000 and more hours... one year every single day at 5 hours a day is not much over 1800 hours. I guess worth a call...
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All Modified: PSA-P5>DIY Strip/Shunyata Defender>RevolutionMacMini/Amarra-KTE Singxer/Gustardx20pro/ZBIT/ZR2/CSP3>OldChen 300B/845>Omega SAHOMs/AudioSmile Tweeters,SVS Micro3000>Pi PCs and DIY PCs, ICs, USB, I2S, Speaker>SR and aluminum w ball bearing feet +
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Gilf
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Re: Static interference from one of my SE84UFO
Reply #7 - 05/19/24 at 02:27:05
 
Bummer, Geno. Iíve been using the 88 from Wathan for several years now. Itís the best of their input tube options that I have heard. Knocking on wood it keeps going strong. Will is right, the longevity is why I tried them in the first place and the great sound is a perk. The price has raised since they were first released. Don has them at $163 + shipping these days.
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Geno
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Without music, life
would be a mistake.

Posts: 2073
Re: Static interference from one of my SE84UFO
Reply #8 - 05/19/24 at 02:41:57
 
Yep. I have been very happy with the tubes. Among, if not the best, input tubes Iíve used.

Quality and claim of longevity, were the reasons I decided to try them.

It wonít hurt to get in touch with Don, and see what he says.

Thanks for the input, gents!

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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222/Zbit
Cambridge Audio CXN(ModWright)
Crown XLS-1002 Sub Amp
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart ē Darlington Labs MP-8b
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in Open Baffles
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