Oblivion | UltraSonic Studios
Jul 28, 2022 at 9:51 PM Post #5,836 of 7,528
Jul 28, 2022 at 10:30 PM Post #5,837 of 7,528
Yeah just think about what these tubes were designed for. I'm pretty sure TV's, radios, radar, and super computers in the 40's and 50's operated at temperatures higher than 85 degrees F.
Let me clarify - it is not the tubes that can be damaged by high ambient room temperature; some tubes are rated for 300C max operation. What I meant is the electronics inside the amp. It is my understanding that some electrolytic components (if they are used in the amp) are rated at max 80C (176F).
 
Jul 30, 2022 at 4:52 AM Post #5,839 of 7,528
I think I saw that in an estate agents window described as "bijou period residence, quiet locality, panoramic views, extensive grounds, character construction in eco friendly materials.. (wood, mostly rotten), it's isolation would suit person with hobbies such as hifi, bass head would be ideal, preferably Australian as they like to pump up the volume on occasion. The only downside is a tendency for the wood construction to burn due to the prevalent forest fires in the region."

Sorry, didn't mean to joke about forest fires.
 
Jul 30, 2022 at 4:58 AM Post #5,840 of 7,528
PS - I'm getting nearly unrivaled sonic prowess from a good pair of black metal RCA 6N7 (VT-96). These are highly underrated input tubes, and are cheap. They can run as one or two tubes depending on your setup, and for me I can run either one with an adapter or two without. They have a way with dynamics and bass definition that I have yet to experience ANYWHERE else, and really do everything else right too. They may need adapters depending on your amp. Anyone interested, just ask here and I'll let you know, because there is a specific lettering that is better than others; but the most important thing is to get them matched and well tested.
I've always liked RCA's but yet to find the black plates. I agree about their qualities, but they're often overlooked.
 
Jul 30, 2022 at 6:20 AM Post #5,841 of 7,528
I also consider 6N7 to be exceptional inputs for UltraSonic amps. I have many, use them often and bought them for nothing. I am glad others share my opinion.
It is true I prefer the glass types instead of full metal, but recently I discover more and more full metal tubes which sound excellent. I can use them via adapter in the 6SN7 slot or if I have a pair in the 6J5 slots directly. The difference is that in the 6J5 slot triodes are in parallel, running at 2mA while on 6SN7 slot they are at 4mA. I never really understood the sonic difference between these 2 cases, but of course it might be something. 6N7 is incredible and RCA are some of my favourites.

2022-07-30 13.12.33-1.jpg
 
Jul 30, 2022 at 3:33 PM Post #5,842 of 7,528
I also consider 6N7 to be exceptional inputs for UltraSonic amps. I have many, use them often and bought them for nothing. I am glad others share my opinion.
It is true I prefer the glass types instead of full metal, but recently I discover more and more full metal tubes which sound excellent. I can use them via adapter in the 6SN7 slot or if I have a pair in the 6J5 slots directly. The difference is that in the 6J5 slot triodes are in parallel, running at 2mA while on 6SN7 slot they are at 4mA. I never really understood the sonic difference between these 2 cases, but of course it might be something. 6N7 is incredible and RCA are some of my favourites.

2022-07-30 13.12.33-1.jpg
That RP RCA is the same construction as the 14F7 RCA that I have used in place of a 12AX7 on my APPJ amp and liked a lot, but still not found a black plate though.
 
Jul 31, 2022 at 5:26 AM Post #5,843 of 7,528
Just went to CanJam London yesterday. Since we all love our tube amps here, thought I'd showcase the tube amps that was in the exhibition.

There was a $100,000 set up with Hifiman Shang-ri la but my favourite is the CRBN with the STAX tube amp, and the Auris Nirvana with the Meze Elites.

Had goosebumps and almost shud a tear with the Shang-ri la setup listening to Pink Floyd's time album, but this is beyond what I can realistically afford

The Susvara and the Feliks Envy was great, and sounded like a fast SS amp with a touch of the tube softness. The tubes used is similar to that of the beloved Telemachus, but haven't heard the tele so don't know how similar they will sound. The Auris Nirvana with EL34 sounded more the tube-sound I was accustomed to with great warmth, impact, noticable decay but still have good speed and doing well with the technicalities.

You dont need 100k to reach audio nirvana.
 

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Jul 31, 2022 at 5:43 AM Post #5,844 of 7,528
Just went to CanJam London yesterday. Since we all love our tube amps here, thought I'd showcase the tube amps that was in the exhibition.

There was a $100,000 set up with Hifiman Shang-ri la but my favourite is the CRBN with the STAX tube amp, and the Auris Nirvana with the Meze Elites.

Had goosebumps and almost shud a tear with the Shang-ri la setup listening to Pink Floyd's time album, but this is beyond what I can realistically afford

The Hifiman and the Feliks Envy was great, and sounded like a fast SS amp with a touch of the tube softness. The tubes used is similar to that of the beloved Telemachus, but haven't heard the tele so don't know how similar they will sound. The Auris Nirvana with EL34 sounded more the tube-sound I was accustomed to with great warmth, impact, noticable decay but still have good speed and doing well with the technicalities.

You dont need 100k to reach audio nirvana.
Did you also get a chance to check out the Zahl HM-1? It seems to be getting a ton of attention and hype since it's debut in Germany a few months back..
 
Jul 31, 2022 at 5:48 AM Post #5,845 of 7,528
Did you also get a chance to check out the Zahl HM-1? It seems to be getting a ton of attention and hype since it's debut in Germany a few months back..

Unfortunately no, I could not find these guys yesterday. but I also found the spirit grand torino set-up
 
Jul 31, 2022 at 5:57 AM Post #5,846 of 7,528
Unfortunately no, I could not find these guys yesterday. but I also found the spirit grand torino set-up
What did you think of the Spirit? Heard Raal's upcoming CA-1A got a ton of positive impressions yesterday with some stating on par with Susvara at roughly half the price.
 
Jul 31, 2022 at 6:00 AM Post #5,847 of 7,528
What did you think of the Spirit? Heard Raal's upcoming CA-1A got a ton of positive impressions yesterday with some stating on par with Susvara at roughly half the price.

Spirits were good, it sounds like typical DD headphones. it had great imaging in 360 space, but could not keep up with the E-stats with layering and depth seperation. Stood out most in the mids to my ears, where it conveyed a large sense of space and with good body.

queue for the Raal's was too long I gave up as I had to leave unfortunately. Next time.
 
Jul 31, 2022 at 6:03 AM Post #5,848 of 7,528
What did you think of the Spirit? Heard Raal's upcoming CA-1A got a ton of positive impressions yesterday with some stating on par with Susvara at roughly half the price.
 

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Jul 31, 2022 at 11:22 AM Post #5,849 of 7,528
That RP RCA is the same construction as the 14F7 RCA that I have used in place of a 12AX7 on my APPJ amp and liked a lot, but still not found a black plate though.
That RCA is bound to be the same as a Sylvania 6sl7. As far as I can tell all the American loctal tubes were made by Sylvania with the rare exception of NU round plate 7n7. Of course it being a Sylvania 6sl7 means it's bound to be a great tube:)
 
Jul 31, 2022 at 11:32 AM Post #5,850 of 7,528
I also consider 6N7 to be exceptional inputs for UltraSonic amps. I have many, use them often and bought them for nothing. I am glad others share my opinion.
It is true I prefer the glass types instead of full metal, but recently I discover more and more full metal tubes which sound excellent. I can use them via adapter in the 6SN7 slot or if I have a pair in the 6J5 slots directly. The difference is that in the 6J5 slot triodes are in parallel, running at 2mA while on 6SN7 slot they are at 4mA. I never really understood the sonic difference between these 2 cases, but of course it might be something. 6N7 is incredible and RCA are some of my favourites.

2022-07-30 13.12.33-1.jpg
Ugh. Now Have another tube to obsess over... lol. I bought some ecc31 and adapters but the Mullard simply does not work in my amp. There are weird and significant frequency changes. I think it's because the plate resistance is about twice the other tubes I usually use. It looks like the 6n7 has much more reasonable plate resistance so I might try some. They are cheap so why not?

At the time I asked if there are any 6n7 worth considering. was given the advice to not bother if I have the Mullard, nothing else will come close. Too often threads here end up obsessing about European tubes and less expensive tubes are inevitably looked down on. I'm glad to hear you've had good experiences with American 6n7 tubes. Have you tried the earlier version of the 6n7, the 6a6? They do look cooler and I'm not ashamed to admit I'm a sucker for a good looking tube:)
 

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