Author Topic: 7N7 tubes  (Read 801 times)

Offline Nick B

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7N7 tubes
« on: January 07, 2022, 09:40:45 PM »
I bought a used Supratek Chardonnay preamp some months ago. Itís a two chassis design and sounds wonderfulÖ a delightful preamp and best Iíve ever owned. It uses
6NS7 tubes and Iíve tried a few brands. There was a post over at AC recentlyÖI forgot which threadÖ but one of the guys said that the 7N7 is an equivalent substitute for the 6NS7, sounds very good and is inexpensive. It does need an adapter, though. Iíve been doing a bit of reading on this. Apparently Sylvania made most or all of these even though theyíre branded otherwise.

Does anyone know about this tube, what types/years might sound best and which adapters to use? Itís intriguing and a pretty cheap experiment.
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline P.I.

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« Last Edit: January 07, 2022, 10:53:34 PM by P.I. »
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Offline Nick B

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Re: 7N7 tubes
« Reply #2 on: January 07, 2022, 11:05:32 PM »
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline ejk

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Re: 7N7 tubes
« Reply #3 on: January 08, 2022, 08:23:11 AM »
Nick you can message member Jbtrio with any questions about the preamp. He had one for years and he rolled many tubes through it
Rogue Audio Sphinx V3, Bluesound N130, Mhdt Orchard DAC, Audio Physics Classic 20, Willsenton R8, IfI DAC, Zu Omen MKII w/Clarity cap, Triangle Borea BRO3, HifiMan HE400SE

Offline Nick B

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Re: 7N7 tubes
« Reply #4 on: January 08, 2022, 10:40:10 AM »
Nick you can message member Jbtrio with any questions about the preamp. He had one for years and he rolled many tubes through it

Thanks, Evan. Just sent him a PM. Jack also owns one and has rolled some through as well. I think it was Joe who I bought my Border Patrol SEi dac from
« Last Edit: January 08, 2022, 10:54:50 AM by Nick B »
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline Jack

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Re: 7N7 tubes
« Reply #5 on: January 08, 2022, 06:02:32 PM »
Nick

After listening to what you had and what I sent you what did you decide worked best with the rest of your setup?
JVC QL-Y7 w/ Denon DL-301 Mk II
Vista Phono II
Jays Audio CDT3 Mk III
Supratek Cabernet
Kinki Studio EX-B7's
Holo Audio May KTE
Auralic Aries G1
Verity Otello
(2) Rythmik F12SE
TWL PC's
Audio Envy IC, PC, SC
Inakustik USB, I2S
PSA Stellar P3
Uberbuss

Offline P.I.

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Re: 7N7 tubes
« Reply #6 on: January 08, 2022, 07:49:34 PM »


Thanks, Dave. Iíll check those out. Quality-wise, would a ceramic adapter be fine? I saw some Yamamoto Teflon adapters. Very expensive  :roll:
IMO - Yamamoto teflon tube sockets are not worth the $$$ for mere mortals like us, but there are these:

https://tctubes.com/tube-sockets.aspx
« Last Edit: January 08, 2022, 07:54:35 PM by P.I. »
"A man with an experience is never at the mercy of a man with an argument." - Hilmar von Campe

Offline Nick B

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Re: 7N7 tubes
« Reply #7 on: January 08, 2022, 07:50:50 PM »
Nick

After listening to what you had and what I sent you what did you decide worked best with the rest of your setup?

Jack,

As you might recall, my Supratek preamp came with 6NS7 Tung Sols and you sent me GEs and Raytheons. It took me a little while, but I finally found some comments I had made that indicated I preferred the Raytheons to the Tung Sols. For the last few months now, Iíve been using the GEs which are very detailed and dynamic. On many/most songs, theyíre quite nice to listen to. There is some occasional harshness, but itís likely mostly recording related.

The tube listening has also been complicated a bit because I bought two Wywires Silver ICs and a Wywires Platinum digital cable. Even though two of the three were used, they needed many hours on them to sound their best.Tonight Iíve put the Raytheons back in again and will be living with that for a few weeks and advise. I will continue to check out the availability of 7N7 tubes if the price is reasonable. It would be a fun ..and inexpensiveÖ experiment.

The sound that Iíve been getting the last few months is so good. There is a synergy with all the gear and the combination of the Audio Envy speaker cables and power cords with the Wywires is quite good.

Nick
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline Nick B

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Re: 7N7 tubes
« Reply #8 on: January 08, 2022, 07:53:42 PM »


Thanks, Dave. Iíll check those out. Quality-wise, would a ceramic adapter be fine? I saw some Yamamoto Teflon adapters. Very expensive  :roll:
IMO - Teflon tube sockets are not worth the $$$ for mere mortals like us.

YeahÖI quite agree. Itís easy to spend too much 💰 in this hobby  :roll:
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline Jack

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Re: 7N7 tubes
« Reply #9 on: January 08, 2022, 08:24:33 PM »
Nick

I've always thought the GE's to be a bit forward for me and generally only use them as driver tubes in amps or preamps that have 6SN7"s as drivers and input tubes like the Sachs. They have a lot of fans though. I have on pair of Canada GE's that have a completely different sound though and appear to be based on an earlier Hytron design. Over the last few months I've been gravitating more and more towards the RCA sound in both preamps for input tubes. Just something comfortable about them. Periodically I will put in the Raytheon VT-231's or the Hytron GT's but in a few days go back to the RCA's especially with the new Rosso speakers. 

Like Dave I would stick with ceramic adaptors if you can find them. Might want to check with Tyson as he knows where to find all of that kind of stuff especially involving the 6SN7 and other octal tubes. 
JVC QL-Y7 w/ Denon DL-301 Mk II
Vista Phono II
Jays Audio CDT3 Mk III
Supratek Cabernet
Kinki Studio EX-B7's
Holo Audio May KTE
Auralic Aries G1
Verity Otello
(2) Rythmik F12SE
TWL PC's
Audio Envy IC, PC, SC
Inakustik USB, I2S
PSA Stellar P3
Uberbuss

Offline Nick B

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Re: 7N7 tubes
« Reply #10 on: January 08, 2022, 09:48:32 PM »
Nick

I've always thought the GE's to be a bit forward for me and generally only use them as driver tubes in amps or preamps that have 6SN7"s as drivers and input tubes like the Sachs. They have a lot of fans though. I have on pair of Canada GE's that have a completely different sound though and appear to be based on an earlier Hytron design. Over the last few months I've been gravitating more and more towards the RCA sound in both preamps for input tubes. Just something comfortable about them. Periodically I will put in the Raytheon VT-231's or the Hytron GT's but in a few days go back to the RCA's especially with the new Rosso speakers. 

Like Dave I would stick with ceramic adaptors if you can find them. Might want to check with Tyson as he knows where to find all of that kind of stuff especially involving the 6SN7 and other octal tubes.

Jack,

The Raytheons are in and sounding pretty good nowÖ It helps if I let those tubes warm up a bit  :lol: I am testing my memory and trying to repeat what I listened to last night. I had not heard of the Canada GEs, so Iím doing a search on them. Glad you are enjoying those GEs and the Rosso speakers 🎶

As to the adapters, I looked at the jacmusic site Dave recommended and Iím pretty sure theyíre ceramic. Dave also just gave me another site with more reasonably priced Teflon adapters.

Thanks,
Nick



Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS

Offline Nick B

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Re: 7N7 tubes
« Reply #11 on: January 08, 2022, 09:50:39 PM »


Thanks, Dave. Iíll check those out. Quality-wise, would a ceramic adapter be fine? I saw some Yamamoto Teflon adapters. Very expensive  :roll:
IMO - Yamamoto teflon tube sockets are not worth the $$$ for mere mortals like us, but there are these:

https://tctubes.com/tube-sockets.aspx

Thank you  :thumb:
Van Alstine SET 120 Control Amp
Supratek Chardonnay preamp
Fritz Carrera 7 BE speakers
Border Patrol SEi dac
iFi Zen Stream & Mojo Audio lps
Wywires Silver cables & Audio Envy power cords
Roon, Tidal, Qobuz
PI Audio UberBUSS