Platinum Matched Pair ECC33 Mullard 6SN7 CV2821 100% Brown Base Great Britain
SKU: 58159504819

Platinum Matched Pair ECC33 Mullard 6SN7 CV2821 100% Brown Base Great Britain

$382.50 $425.00
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Description

Platinum Matched Pair ECC33 Mullard 6SN7 CV2821 100% Brown Base Great BritainExtremely rare Mullard UK ECC33 CV2821 (6SN7 sub with a bit higher gain), platinum matched pair (2 tubes) Brown base, gray coated, old type square getter with two rods. Used, tested 110% of NOS values. The same date production. 100V on anodes and 0V on grids: (10. 8 10. 9) (10. 9 10. 8) mA 250V on anodes and 6V on grids: (2. 2 2. 3) (2. 4 2. 3) mA Made in famous Blackburn tube plant in 1958, fX1 B8L, the same etched codes. The same codes on base as

Extremely rare Mullard UK ECC33 CV2821 (6SN7 sub with a bit higher gain), platinum matched pair (2 tubes)
Brown base, gray coated, old type square getter with two rods.

Used, tested 110% of NOS values. The same date production. 

100V on anodes and 0V on grids: (10.8/10.9) (10.9/10.8) mA
250V on anodes and -6V on grids: (2.2/2.3) (2.4/2.3) mA

Made in famous Blackburn tube plant in 1958, fX1 B8L, the same etched codes. The same codes on base as well.

Tested for microphonics and noise in RIAA preamp.


Genuine Great Britain product, made in 1958. Hard to find today.



I collect tubes and tube gear for more then 35 years and I start to sell recently, please be sure to check my other items and visit my store for more rare NOS tubes and parts.

If you buy any item on ebay from me and for if you are not fully satisfied for any reason or have any complains, please send me message before leaving negative or neutral feedback or opening a case. I really do care about your satisfaction and I’ll do my best to solve any kind of problem.

I have more than 250000 NOS tubes in stock and just small part is listed here, if you are interested in any specific tube or part, please send me message.


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Exchange/Return Notes
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SKU: 58159504819

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4.2 ★★★★★
Based on 804 reviews
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Kathy Sweatmon
Carnegie, US
★★★★★ 5
Good product
Color: Black, Size: Medium
It is as described, looks neat and tidy on the sink. Just big enough to do what I need it to do. My sink stays dry because the wate goes back int the sink.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 14, 2026
E
Verified Purchase
Ethel White
Dallas, US
★★★★★ 5
Quality is good.
Color: Black, Size: Medium
A product that works as promised.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
Y
Verified Purchase
Yaelita
Phoenix, US
★★★★★ 3
It is almost great.
Color: Black, Size: Medium
It is a nice sponge holder but the tray is not wide enough and it falls. Because it was the only one I found with a spout, I am keeping it, and figured a way to stick it so the tray doesn't fall. The other thing is that the tray is not sunken enough in the middle for all the water to be routed there, and the spout doesn't always get rid of all the water inside, so once in a few days, I have to manually press it down and more water comes out. The dishcloth rack is not great for cloths, they get wet. Other than that, it looks very nice, it is aesthetic, big enough for all my kitchen stuff, and makes my kitchen neater, so I like it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 17, 2026
A
Verified Purchase
Aprilfool
Port Orchard, US
★★★★★ 4
Love this product very convenient
Color: Silver, Size: Medium
This was great to keep all my brushes, cloth, detergent and scrubby together and neat. I love the drainage and it looks clean. The only thing I don't care for is the bar that holds the cloth comes off all the time. Other than that it is great.
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Reviewed in the United States on March 30, 2026
D
Verified Purchase
Dadhich Sawant
Lowell, US
★★★★★ 5
Nice Product
Color: 2 Tier-Black, Color: 2 Tier-Black
Super Handy and So Stylish — A Must-Have for Any Kitchen! I’m really impressed with the Sinnsally Kitchen Sponge Holder! It’s simple, practical, and makes keeping my sink area neat so much easier. The 2-tier design is brilliant — the top shelf holds my sponges perfectly, while the bottom area keeps scrubbers and brushes organized and easily accessible. The stainless steel looks sleek and modern, and it has held up beautifully with daily use. Water drains well so everything dries quickly, and cleanup is a breeze. No more soggy sponges sitting around! Installation was quick and easy — it fits nicely right by the sink without taking up too much space. This little holder has made a big difference in keeping my kitchen tidy. Highly recommend for anyone who wants a clean, organized sink area with a touch of style!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 3, 2026

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