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Description
EL34 Mullard Platinum Matched Quad NOS NIB Blackburn Xf4 1979, rebranded PhilipsMullard Blackburn EL34 6CA7 Platinum matched quad (4) tubes Platinum matched quad within 5% of rare Xf4 type, rebranded Philips in genuine yellow Philips boxes. I had few 100 pcs boxes of these gems, so all quads I offer for sale are perfectly matched, within 5% or less. Two slots on plates, four support points on both spacers, folded plates (stapled), copper grid posts, black base! They are made in Mullard Blackburn tube plant, and etched codes the
Mullard Blackburn EL34 / 6CA7 Platinum matched quad (4) tubes
Platinum matched quad within 5% of rare Xf4 type, rebranded Philips in genuine yellow Philips boxes.
I had few 100 pcs boxes of these gems, so all quads I offer for sale are perfectly matched, within 5% or less.
Two slots on plates, four support points on both spacers, folded plates (stapled), copper grid posts, black base! They are made in Mullard Blackburn tube plant, and etched codes the same. The codes are clearly visible on photos Xf4 B9K4.
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4.8 ★★★★★
Based on 1776 reviews
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Product Reviews
★★★★★ 5
Dog toy is tough and durable
Color: Blue&Red Fish
It’s great for aggressive chewers, my pittbull loves it
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Reviewed in the United States on May 2, 2026
★★★★★ 1
Our dogs hurt their mouths chewing these bones
Color: Purple & Blue
I don't do a lot of reviews because I realize many are objective opinions. However, in this case I felt it was necessary to warn others. Our dogs are aggressive chewers. Their last rubber bones (not these) which we've purchased before, and recently purchased again, were destroyed quickly. Chunks of rubber came off the ends. Since those didn't hold up like they used to, I found these harder bones hoping they would last longer. They were able to gnaw into the hard plastic within a few minutes. This created sharp edges that cut their mouths. When I saw a bit of blood on the bones, I took them away from the dogs and threw them away. I wondered why they quit chewing on them after being so excited at first. Also, these are hard enough to damage a tooth.
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Reviewed in the United States on December 6, 2025
★★★★★ 2
Pups have shown zero interest in these toys….
Color: Purple & Blue
I would agree that these are indestructible being neither of my dogs have shown any interest in these at all. At this rate they should last forever…
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Reviewed in the United States on April 10, 2026
★★★★★ 4
Durable but losses interest
Color: Purple & Blue
My dog is an aggressive chewer. She was interested in this toy while it was new, but soon after lost interest. Good news is although it took a beating it did not break or splinter. If soppy toys are disposable in your house, give it a try.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Chew toy that will last!
Color: Blue&Red Fish
Great toy for a real chewer. It's been in the house for about 5 days and the toy is still intact and the squeaker is still squeaking.
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Reviewed in the United States on May 28, 2026