Reliable Dealer for 6CS7 tubes

I just checked there are 6CS7 tubes available at Ebay. Most of them are NOS.

Yes, but thats not the issue.  I have found the matching is not reliable.  So one thinks they are buying a quad of NOS only to find out later that were not well matched.

Brent Jessee has them listed in his inventory. 

On the Leben modification, if you haven't already, reach out to James Koch of High End Repair in Arizona. 

Tube Amp Doctor seems to have them.

https://www.tubeampdoctor.com/en/6cs7-double-triode

Thanks for the suggestions.

Unfortunately, those vendors both have a single tube.  I did reach out to High End Repair and he emphatically told me there was no such modification available or planned.

Here ya go!

https://www.tubedepot.com/products/6cs7

@rivinyl Have you contacted Yoshi Hontani about the modification? He's responsive and very helpful. 

No

how does one reach him?

thanks

No worries...I don't think his email can be posted here but it's a trivial search to find elsewhere. Best of luck!

Ok

but who is he?

Ahh, found him online.

Will reach out to him.

Thanks for all the advice.  Another interesting tidbit.

The US distributor shared that the preamp tubes do not have to be a complete match.

Again I appreciate the input.

@rivinyl also check Andy Bowman of Vintage Tube Services.  He is the only one I trust and has quality tubes.  https://vintagetubeservices.com/

I did reach out to Y Hontani and he did say the modification is available.  I must say I am wondering if its available in the USA as in the recent past, J Halpern stated it was not.  But if it is an option, has anyone ever heard the sound of the modified cs 600?