Replacement for SED 6550C Winged C


 I am now using SED 6550C winged C from 2008.  I really love the tone texture of these tubes.

I am having some trouble with my set (4) of these tubes and would like to get a replacement, however I am not finding the exact replacement, made in St. Petersburg, at a reasonable price from a trustworthy dealer.  I could get a set from  Russia but I prefer to try domestically first.

Consequently, I am asking if any of you, having experience with this tube, if you know of another tube that has such tone and texture.  I focus primarily on vocals.

chinook9
I just bought some Gold Lion KT88s for my Prima Luna. A very nice sounding tube. 
Replacement for SED 6550C Winged C

I had great results with Rogue M120 monoblocks, modded with far better output transformers with KT90’s then after KT120’s from Mike Mathew’s New York company "New Sensor" or "Electro-Harmonix" Whatever he calls it today. Just make sure the heater circuit is up to it, as from memory I think one or the other may take a bit more current than the 6550.

https://shop.ehx.com/item/kt90eh/
https://shop.ehx.com/item/kt120%20tung-sol/

Even cheaper with an account.

Cheers George




As for the best sounding 6550 I’ve listened to, it been NOS Mil Spec Green Label GE plain white box, like these $350usd each!!!!!
https://cdn.shopify.com/s/files/1/0333/7633/products/1_df378355-c1a5-4552-aa85-251a38398fc0_large.jp...
The glass was twice as thick you feel it in the weight and hear it when you flicked them with your finger nail.

Cheers George
I switched from SED 6550C Winged "C" to Gold Lion-KT-88's for my VTL amps many years ago.  They are a bit warmer with better bass. I enjoy them so much I've not considered trying another brand of tube.
Also use NOS JAN GE 6550. Winged C 6550 do come up from time to time from US Resellers.