Systemic Development > Amplification and Preamplification

7N7 tubes

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Nick B:
I bought a used Supratek Chardonnay preamp some months ago. It’s a two chassis design and sounds wonderful… a delightful preamp and best I’ve ever owned. It uses
6NS7 tubes and I’ve tried a few brands. There was a post over at AC recently…I forgot which thread… 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. I’ve been doing a bit of reading on this. Apparently Sylvania made most or all of these even though they’re branded otherwise.

Does anyone know about this tube, what types/years might sound best and which adapters to use? It’s intriguing and a pretty cheap experiment.

P.I.:
Nick,  here you go:

https://www.jacmusic.com/sockets/Socket-Adapters.htm

https://www.nosvacuumtubes.net/product-category/other-tubes/other-tubes-7n7/

https://www.nosvacuumtubes.net/product-category/other-tubes/other-tubes-7n7/

Nick B:

--- Quote from: P.I. on January 07, 2022, 10:48:20 PM ---Nick,  here you go:

https://www.jacmusic.com/sockets/Socket-Adapters.htm

https://www.nosvacuumtubes.net/product-category/other-tubes/other-tubes-7n7/

https://www.nosvacuumtubes.net/product-category/other-tubes/other-tubes-7n7/

--- End quote ---

Thanks, Dave. I’ll check those out. Quality-wise, would a ceramic adapter be fine? I saw some Yamamoto Teflon adapters. Very expensive  :roll:

ejk:
Nick you can message member Jbtrio with any questions about the preamp. He had one for years and he rolled many tubes through it

Nick B:

--- Quote from: ejk 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

--- End quote ---

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

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