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-   -   how to see if a Mullard 12ax7 reissue is long or short plate (http://www.diyaudio.com/forums/tubes-valves/227965-how-see-if-mullard-12ax7-reissue-long-short-plate.html)

Mr. Green 16th January 2013 04:36 PM

how to see if a Mullard 12ax7 reissue is long or short plate
 
Can anybody help me out how to see if my re-issue mullards are long or short plate ? How do can you tell the differnce? Any special markings ?

kevinkr 16th January 2013 04:55 PM

The length of the plates themselves, there should be plenty of photographic examples online to allow you to verify this.

Salectric 16th January 2013 05:03 PM

Take a look at the Mullard photos on the Tubeworld.com website. They clearly show the difference between long and short plates.

TubeHead Johnny 17th January 2013 04:38 AM

The reissue (Russian) Mullard 12AX7 is the exact same tube as the Sovtek 12AX7LPS, which are both long plate, with a spiral filament.

Mr. Green 17th January 2013 06:17 AM

Thank you fro your replies, they where very helpful.

I found out they are long plates, and can now tell the difference. Thanks


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