I am selling a lot of my spares from my private tube based music studio! I have too many tubes for my needs!

Vintage premium 6X4WA/EZ90 rectifier tube by one of my favourite brands, Tung Sol.

Early 60s - very rare tube!

Amazing tube for any application! One of the best ever made! 

Great for those hi-fi Nobsound preamps used with an adapter from 6Z4 to 6X4!

With black plates and ring getter.

Tube is new, never used. 

Please check all pictures.

Test very strong.

Tested with my calibrated TV-7/U military tester with these values:

Tube 1 - 55/56

No gas, no leaks.

The TV-7/U minimum recommended value (65%) for each plate of the 6X4 is 40. Data is from the RCA Receiving Tube Manual.

This is a high end premium tube from the early 60s. Current production tubes simply can´t compare to this construction and sound quality. 

Great for DACs, preamps, amplifiers, tape recorders, guitar amps, and/or other critical situations where the minimum noise and maximum quality is required.

Vintage sound from the 60s - no modern tubes can do it! Get it while you can!

Sold as is - no returns.

Flat shipping fees:
- Tracked shipping to Europe is 10$, Worldwide shipping is 14$.

I accept combined shipping so check out my other items!

This is an honest listing - I tried to describe the item the best I can.

I always pack very carefully, just as I like to receive the items myself.

I am not responsible for any customs fees and/or import duties.

I am a private collector, not a business, so no warranty is given. 

I cannot ship on Mondays and Tuesdays.

No sales for accounts with less than 5 feedbacks - no exceptions - they will be cancelled.

No shipping to Russia, China or Africa - sorry but it´s too insecure to ship there.

Due to the recent lack of feedback from the customers, from now on, feedback will be only left after the buyer leave feedback.

Thanks for looking!