Hi, Apologies if this is not the correct place. I would like to ask advice for any repair shops you may know that may be willing to repair tube amplifiers. Ideally in South/Central Europe.

Hi, has anyone tried the Tungsten with the Cayin HA-300 MKII? On what settings? And is there enough headroom? I am going for the DS version. Would really like to try a 300B tube amp.

It is the vibrating / clicking sound. When I switched off the channel, it stopped vibrating. So I assume it is coming from the transformer or some related components - definitely not from the tubes as I switched those off.

Hi, https://streamable.com/czqv0t I have noticed a strange sound, not sure if it is coming from the transformer or something else. I swapped the KT170 positions. This is HE6se on the 8 Ohm impedance at around 75% volume open. What is it? Do I need to worry?

This is why I have good hopes for the ModHouse Tungsten. It is high impedance but also has a very low sensitivity. Should be even quieter than the HE-6 SE and hopefully better in technicalities. My Odyssey too has an impedance switch (125 ohm) and ultra linear. I like ultra linear more. I find...

No worries... He was a great person and talented amp builder, with so much more to give. https://www.head-fi.org/threads/oblivion-ultrasonic-studios.902926/post-16944196 https://www.head-fi.org/threads/oblivion-ultrasonic-studios.902926/post-16944251 My amp. Now the waiting game for the...

I have an impedance switch, the output transformers were custom wound by Sowter to provide output at 8, 32 and 125 ohms. I remember dear Thomas taking a long time wiring it all up. I am not a tube expert, but he had provided me some photos of the build process. These were his own measurements.

It actually is around - 100R 3.6W @ 32ohm, 9.8W @ 128ohm. I just re-checked my correspondence with him. That is in Triode mode. UL should be more. Is that still OK? Will update you when I eventually get one. It is a long wait! Thanks!

Dear all, If you don't mind giving some advice - I have an UltraSonic Studios Odyssey amplifier (built by the late Tomas Jernberg). It is a tube amplifier, and has custom Sorter output transformers with custom windings at 8, 32 and 125 ohms and can output 13-14 Watts at these windings. Will...

He was indeed. I have the HEDDphone (OG or V1 now) that is technically quite high achieving. But it is the HE-6 SE that truly pushes the correct buttons for me on this amp... Maybe due to fondness - how amazing Thomas was as we discussed about it, while the amp was being conceived in our...

Just purchased the ModHouse Tungsten Double Sided. Seeing my Odyssey was made for hard to drive planars, I hope this will be a great match. At 155 ohm and 78 dB/mW average, I will put the impedance matcher put to test :) Thomas had told me this was 13-14 W into 8, 32 and 128 ohm...

Check the driver tubes. I had similar.problems, I was hearing "static". He told me it is 99% a driver problem. That was actually Tomas' last message, 21st February :( and he was right.

I would be all in for continuing the legacy. Not as UltraSonic, as something different. But the ideas themselves, I think should not be lost. The philosophy of design should persist I think, with fresh new ideas why not.

From my experience, Tomas worked on enclosures depending on customer request and preference. My Audio-GD themed build was precisely that. He was kind enough to accept something like that and was kind enough to work around it to develop a fabulous amp.

This is what I envisaged, when I had started discussions with Tomas about my amp. Big rectifiers, blue glowing KT170s, and that 6SL7 gain I have not been able to with other tubes. RIP dear Tomas, every time I'll listen to this amp, I'll be happy and think of you.

Tomas had mentioned Mika Kalm aka MrCurwen in his website, but I see that he has not been online on this forum since 2020. Tomas had mentioned extra transformers for DHTs like 300B. In fact there were discussions of this being a two chassis build, one for power supply, another for the drivers...

My ultimate amp was to be a 300B Citadel. I think it is a shame that Tomas' ideas in amp design go to rest with him. Do you know anyone who would like to continue develop these ideas? Maybe we could join together our ideas and create this amp in his name?

No, I took a break from such investments for now. Pretty happy with the HEDDphone and my Odyssey. Then there is the HE-6 V2 as well. I may get a 300B Citadel, if I get back to sensitive headphones... Here it is resting after a good night of country tunes.

A work of art, as usual. I'm sure it sounds equally as brilliant. Catching up, what are it's features?

I had asked to have it removed. No power light for me.... Just tubes!

Ironically on my Odyssey, I prefer it on the HEDDphone on the low impedance setting (8 ohms). At 32 ohmS for it, I feel, only increases the hum. I also have an attenuation switch, I find it does alter the characteristics - especially base and vocal forwardness. What cables do you use with...

You showed me yours... I'll show you mine... A beefy Hammond mains, and the custom Sowters.

Those transformers look excellent! What happened to the mains transformer? Will you be using Monolith again for the mains?

That is the same I keep it with HE-6SE if on 8 ohm winding. So I must assume ours have similar output power... Beautiful tubes! I think these were one of the first you listed to in the amp? It's the same for me with the KT170s

Speaking about sleepless nights, some night shots of the new LinLai tubes. Been abroad for the entire week, I still have not had the time to fully listen to them - I was told 40 hours of burn in, and still far from that, but I am liking what I hear, especially in terms of detail and balance...