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

Sale price$382.50 Regular price$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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4.4 ★★★★★
Based on 199 reviews
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David
Alexandria, US
★★★★★ 5
Finally a ball my power chewers cannot destroy
Size: Medium
I have two dogs, an American Bully and an American Pit Bull Terrier, and both of them love to chew. Most balls last a very short time around here before they are shredded or missing big chunks. This one has actually held up. They chase it, tug on it and sit and chew on it, and it is still in one piece with no pieces breaking off. One of my favorite things is being able to put food inside. I add some kibble or small snacks, and they will happily sit and work on it for a long time. It keeps them busy, gives them something safe to chew, and they get a little reward while they play. When they are done, I just rinse it out and it is ready to go again. If you have strong jawed dogs that usually destroy toys, this ball is worth trying. Mine really enjoy it and I feel better knowing they finally have a ball that can keep up with them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 22, 2025
J
Verified Purchase
Jen Siefert
Port Orchard, US
★★★★★ 5
My dog LOVES this ball
Size: Medium, Size: Medium
Does your dog destroy tennis balls in seconds? Yes? Then your dog NEEDS this ball! It's squishy like a tennis ball, fits in ball launchers (even the cheap ones) and bounces when it hits the ground. My dog has been literally playing with this ball all day and not a single mark on it! The only bad thing is that it does not float. Definitely worth the money! Put it in your cart!
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Reviewed in the United States on March 8, 2026
W
Verified Purchase
Wolf-Haven
Draper, US
★★★★★ 5
Perfect for ball demolishers
Size: Medium
The dogs love the chuck it brand. I don’t know what it’s made of but they go crazy over them. Will not play with another ball. Wonder if it’s “laced” with an addictive scent. Have pits. Very durable. Not able to chew to pieces. Last for about 6 months before there is a small break. I keep a back up because when the ball goes missing the house is in chaos. 😆 🤪
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Reviewed in the United States on March 27, 2026
T
Verified Purchase
Tatiana
Houston, US
★★★★★ 5
Most durable ball!
Size: Medium
This are my dogs fav ball 😍 they last forever!
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Reviewed in the United States on April 23, 2026
N
Verified Purchase
Nana
Belleville, US
★★★★★ 4
Chuckit medium rebound balls
Size: Medium
My 8 month old German shepherd dog loves these balls. They are easy to throw, they bounce great, they are very chewable! She keeps one in her mouth most of the time. It satisfies her need to chew and she does not chew other things. She drops it in the water and lets the hole fill up and drinks that way. The only problem that has caused is suction in her mouth and difficulty in dislodging it for her. However, she would be lost without it!
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Reviewed in the United States on April 19, 2023

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