Does it look like fake ECC83 / 12AX7 Mullards?

denrrou

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The valve has gone to air due to the incorrect positioning of the pins and a forced insertion.
Not a fault of the valve.
Glass cannot bend and the misplaced pin broke the seal.
It doesn't matter if the valve cost £0.30p or a ridiculously high priced £135, all glass will break when abused.
if the tube broke when inserting should the amp work? I played the amp for a while and the tube worked.
 

denrrou

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As the vacuum fails, the valve will lose functionality.
so unless the vacuum takes considerable time to fail after breaking the glass, i think it was not the case, i played the amp for some good time and it worked normally. For sure the pins bented while trying to remove the tube once i noticed it was dead since it was made almost in two parts, but while inserting i always do it gently and with deliberated care so that i cant be 100% sure it was not due to bad handling, but i think it is improbable
 

Amadeus91

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Never look at the printed logo. Look at the etched code. The triangle means Heerlen NL, B means Blackburn UK. I have Blackburn logo tubes made by Telefunken...
Yes, here is one I thought you might find interesting.
Mullard black logo, BUT it was really made in Hamburg (1956). The code is D6.
The Hamburg ones are really, really outstanding.
IMG-0314.jpg
IMG-0329.jpg
 

StingRay85

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Yes, here is one I thought you might find interesting.
Mullard black logo, BUT it was really made in Hamburg (1956). The code is D6.
The Hamburg ones are really, really outstanding.
IMG-0314.jpg
IMG-0329.jpg
I have 3 of those Hamburg long plates with philips label. mC1 and mC5 if I'm not mistaken. And also I60 short plates from Hamburg
 

Jon Snell

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if the tube broke when inserting should the amp work? I played the amp for a while and the tube worked.
Air enters the valve slowly in the case of a crack in the glass when it is on the base.
Sometimes it can be 5 minutes before the heaters burn up, so it can still amplify for that length of time due to the getter absorbing the air.
It is highly unlikely, in my opinion, to have been a fault in the glass as if it would, the likelyhood of it failing when plugged in is doubtful.
You can try and make it look like as it warmed up the glass broke, in that case it is likely it would have cracked/broken when it was tested before you received it.
 
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Jethro Rocker

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I will admit, the cartons are a nice touch, but really, who's going to believe 50 year old Mullard cartons in absolutely pristine, unfaded condition, either? That's just as suspicious as the misspelled stamp.
Yep those are not original Mullard 50 year old boxes. Fonts and printing all wrong for that period too.
 

Chappy

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Someone in Bulgaria is making reproduction Mullard tube boxes and there are multiple listings on EBay. I bought a bunch a few years back for my Mullard tube stash.
 

Amadeus91

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Yep those are not original Mullard 50 year old boxes. Fonts and printing all wrong for that period too.
Sometimes, you can get lucky.......
IMG-0253.jpg
IMG-0254.jpg
IMG-0255.jpg
IMG-0256.jpg
IMG-0257.jpg
IMG-0258.jpg
IMG-1554.jpg
IMG-1818.jpg
IMG-1817.jpg
IMG-1819.jpg

Look at the price for the EL34s!
The first time the EL34s were opened since they were packaged
was so they could be tested for me.
 
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denrrou

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The new replacement of the mullard of madness has arrived. None of them came in the blue mullard box... none of them have any sigh of etch code at all. One pin came bented by default, that might have to do with the previous one cracking... lets see how long this one will takes to blow...
 

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stickyfinger

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I'm no tube expert but didn't the Chinese or Japanese buy the old Mullard tube equipment and make tubes that structurally look like vintage Mullards but were called (don't remember name started with a M...)
 

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