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04/26/26 at 17:36:06

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SE84UFO and Bitsy (Read 29 times)

Karl

Senior Member

Posts: 55

SE84UFO and Bitsy
Today at 13:12:38

Hello friends. I was lucky to find a nice SE84UFO (level 2) from 2025 on USAudiomart. It included a Sophia electric Aqua 274B III and a globe 80 as rectifier choices. I have been enjoying both of them.

I initially used the SE84UFO with my Zu Union 6 supremes but ultimately ended up preferring my Torii Mk IV in that room. So, I set up a bedroom system with the zen amp and a beautiful pair Decware Bitsys. I added a REL zero mkIII and use a Bluesound node as a source. I have been listening for a couple weeks now and I am happy.

One thing I’ve noticed is occasion dropout of the right channel. This is fixed by flipping the input tube bias switch. I’m suspicious that something might be loose internally? Anyone else notice this problem with their SE84?

Digital: Bel Canto E1X Analog: Rega P10/Lyra Etna SL/Sutherland Mini Loco Mk II Pre: Aric Unlimited II, Amp: Torii Mk IV Speakers: Zu Union 6 Supreme

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CAJames

Seasoned Member

"I've run every
red light on memory
lane."

Posts: 3204

Re: SE84UFO and Bitsy
Reply #1 - Today at 15:30:01

Quote:

Posted by: Karl Posted on: Today at 05:12:38

...One thing I’ve noticed is occasion dropout of the right channel. This is fixed by flipping the input tube bias switch. I’m suspicious that something might be loose internally? Anyone else notice this problem with their SE84?

Have you tried different input tubes? That sounds more like a tube problem than an amp problem to me.

If it happens with multiple tubes then it is time to call Steve IMO.

[Volumio | Jay's CDT2 MRK3] -> Denafrips Terminator 2 + Gaia
Sumiko Pearwood -> Mapleknoll Athena -> Luxman SUT -> Mapletree Phono 3E
STR-1002 -> Woo WA22 -> 2x UFO25s, balanced monos
Omega SAM , Hifiman Arya, Audeze LCD-XC

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Tommy Freefall Seasoned Member Posts: 431	Re: SE84UFO and Bitsy Reply #2 - Today at 16:13:50 First I would try removing both el84s and flipping them to the other channel. Then wait awhile and see if the dropout comes from the left channel.
Back to top	Naim Nait 50 Benchmark AHB2 Zu Audio DWX Supreme Decware ZRock2 Tascam CD-240 Benchmark DAC3 HGC Bluesound Node Zu Audio speaker cables Decware Zenhead, Grado 325e, ZMF IP Logged

Karl Senior Member Posts: 55	Re: SE84UFO and Bitsy Reply #3 - Today at 16:42:05 It happens with different input tubes. Always the right channel and always comes back on with a flip of the bias switch. From low to high or high to low. I will try the output tube swap and report back.
Back to top	Digital: Bel Canto E1X Analog: Rega P10/Lyra Etna SL/Sutherland Mini Loco Mk II Pre: Aric Unlimited II, Amp: Torii Mk IV Speakers: Zu Union 6 Supreme IP Logged

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