SKU: 60147520593

EL34 6CA7 Mullard Xf3 NOS Platinum Matched Quad Blackburn 1975 Rebranded Siemens

$562.27 $624.75
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Description

EL34 6CA7 Mullard Xf3 NOS Platinum Matched Quad Blackburn 1975 Rebranded SiemensOne perfectly matched quad of genuine EL34 6CA7 made by Mullard, Blackburn in 1975, Xf3 codes. They are rebranded Siemens (Siemens has never made any EL34!), NOS NIB, in original Siemens boxes. Top mica spacer with 10 support points, folded plates (stapled), two slots on plates, black base with central hole in guiding pin. I had a few dozen of these tubes (all the same date codes!!!), and all quads I have are carefully tested and matched by plate

One perfectly matched quad of genuine EL34 / 6CA7 made by Mullard, Blackburn in 1975, Xf3 codes. 


They are rebranded Siemens (Siemens has never made any EL34!), NOS NIB, in original Siemens boxes. 
Top mica spacer with 10 support points, folded plates (stapled), two slots on plates, black base with central hole in guiding pin. 


I had a few dozen of these tubes (all the same date codes!!!), and all quads I have are carefully tested and matched by plate current on my Metrix U61-B tester. Due to big number of tested tubes, they are matched within 5% or less!!! These are very strong examples, selected from big number of the same batch tubes!

It's really hard to find four practically exact genuine NOS Mullard EL34 with perfect prints and the same etched codes today, be fast and take this opportunity while they are still in stock!!!












This is a private listing and I do not give a warranty about the quality of the valves, and I do not accept returns. These valves are carefully matched and they are 100% in perfect working condition, I simply can not take responsibility for some users who do not know how to change tubes in their amplifiers.

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 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.

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: 60147520593

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4.2 ★★★★★
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Kelly S.
Louisville, US
★★★★★ 3
Not for aggressive chewers
Size: Medium Chew Stick, Style: Peanut Butter
Not for aggressive chewers. Our dog tore pieces off within minutes
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Reviewed in the United States on February 15, 2026
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Kristy Moss
Lowell, US
★★★★★ 2
Not very strong
Size: Medium Chew Stick, Style: Peanut Butter
We have a different bone from this company that my dogs love and it’s been indestructible for my hard chewers, but NOT this one. Within 20min of chewing he was pulling pieces off. It’s not nearly as tough as the other one we have. Pretty disappointed.
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Reviewed in the United States on January 18, 2026
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Pat
Lexington, US
★★★★★ 1
Recommended for Seniors, Not for Chewers
Size: Medium Chew Stick, Style: Pork Sausage
My 12lb dog loves Playology toys because of the long-lasting scent that's stimulating for her (even though I can't detect the smell). I got this toy because I wanted to add a different texture to her toy bin since most of her toys are rope & plush. Unfortunately, after only 10 minutes of playing with this toy, she managed to tear the pieces of the rubber off and I had to take it away so she doesn't choke on the pieces that were breaking off. Now I see why this toy's recommended for senior dogs. Definitely not recommended for active dogs or heavy chewers.
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Reviewed in the United States on July 27, 2024
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Amanda
Belleville, US
★★★★★ 5
Very well made and helps clean teeth and mouth! Great for all age dogs!s!
Size: Medium Chew Stick, Style: Peanut Butter, Size: Medium Chew Stick, Style: Peanut Butter
My pup absolutely loves it and it's helping him with teething. It doesn't break off in a bunch of big pieces, just tiny pieces. He spits out the little pieces thankfully! Very well made and smells appetizing to dogs! It definitely helps clean his teeth & the rest of his mouth!
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Reviewed in the United States on April 6, 2025
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Whoknewit'sme
Houston, US
★★★★★ 5
Mini Aussie LOVES
Flavor Name: Peanut Butter, Size: Large, Flavor Name: Peanut Butter, Size: Large
My little Meg loves these chew bones, she sneaks in and steals them from our Golden Retriever and our Great Pyrenees. She chews the orange covering off in minutes and the under bone lasts a few weeks. The dogs steal them from each other all the time, even though I buy them each one. Highly recommend if you have a super chewer, just be mindful the orange cover is easily chewed off.
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Reviewed in the United States on May 13, 2024

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