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In Reply to: RE: Nah posted by Mendel on April 06, 2014 at 09:30:22
is correct.
Philips of Holland owned Mullard, and bought them out in 1927, quiite a while ago.
Theoretically all the Philips factories followed the same blueprints for tube design. This would be particularly true for the 6DJ8/ECC88 types, but funny how all the different Philips plants sound a bit different (as Coors would say, its the water.....)
Incidentally I have seen mC1 with a Heerlen designation, IIRC. It was on Ebay and I could barely make out the acid etched code in the photo, Didn't buy it and didn't inquire any further either. IIRC I have a few I65 with Blackburn factory codes, but I'll have to double check
Follow Ups:
Curious and I will have to repeat my experimentation to rejog my memory, but IIRC, the Heerlen I's sound different from the Blackburn I 12 AX7's. As memory serves me the Heerlen version always sounded a tad brighter than the Mullards for some reason.
Its like 5751 and comparing Sylvania's to GE's. The Sylvania's consistently sound a bit darker than the GE's even though the internals almost seem to be identical.
Stu, my experience mirrors yours on the Blackburn/Heerlen tubes.
I'm sure you're right about the sound.
I was only committing on the "cross labeling" and wondering that since the plants were owned by the same company if it's really correct to call it cross labeling.
No biggie.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Tre, it looks like nothing has changed. Look at the variations in the Shuguang Treasure and Psvane tubes. The Russian new production has changed over the years. SED Winged C's are now NOS.
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