UltraSonic Studios Amps
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Oct 21, 2022 at 7:30 PM Post #6,617 of 7,569
It is RCA 1635 but what is it? It's not a 6sn7 equivalent is it?

No, while it is a double triode, it is very different than a 6SN7. It has an amplification factor of 65, close to that of a 6SL7. However, it has two separate control grids connected in parallel, and I suspect it is too strange to use in a typical audio amp. That said, perhaps Ultrasonic Studio might consider building something interesting with it? :)
 
Oct 21, 2022 at 10:34 PM Post #6,618 of 7,569
Happy to fully join the Ultrasonic family.

My Telemachus has entered more than 1 month of service and has already caused many sleepless nights..
 

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Oct 21, 2022 at 10:51 PM Post #6,619 of 7,569
It is RCA 1635 but what is it? It's not a 6sn7 equivalent is it?
It's a tube for the golf cart audio system, obviously. No more yelling at me when I drive into the lake. 🤣

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Oct 22, 2022 at 4:51 AM Post #6,623 of 7,569
It's a tube for the golf cart audio system, obviously. No more yelling at me when I drive into the lake. 🤣

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A tube based sonar obviously for the purposes of finding those missing golf balls 🤣.
 
Oct 22, 2022 at 4:53 AM Post #6,624 of 7,569
Oct 22, 2022 at 8:07 AM Post #6,626 of 7,569
A tube based sonar obviously for the purposes of finding those missing golf balls 🤣.
LOL! If @UntilThen could keep his balls in the fairway, I wouldn't be the only caddy on the course dressed in scuba gear. 🤣
 
Oct 22, 2022 at 8:55 AM Post #6,627 of 7,569
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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.

These are not the top of the line. The SL7s are their "basic" offering, the 274Bs, you could call "mid-range".

Still makes my HE-6SEs sing! Never saw a blue glow on driver tubes!
 
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Oct 22, 2022 at 10:09 AM Post #6,628 of 7,569
These are not the top of the line. The SL7s are their "basic" offering, the 274Bs, you could call "mid-range".

Still makes my HE-6SEs sing! Never saw a blue glow on driver tubes!
Same here. The tubes I'm rollin right now are not exactly TOTL but having a great time
 
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Oct 22, 2022 at 10:27 AM Post #6,629 of 7,569
Oct 22, 2022 at 10:23 PM Post #6,630 of 7,569
I'm back to using the Telefunken tubes EL11 and EL12 spez with 5U4G rectifier. In UL mode, driving my speakers or Susvara. Amp is cooler with these tubes but amazing clarity and tone. Has to be one of the best combo in Odyssey. Source is my Pioneer sacd player, playing Eagles Hell Freezes Over JVC xrcd2 album.

See the volume knob is only there driving Susvara. Lots more headroom.

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