how to see if a Mullard 12ax7 reissue is long or short plate

Mr. Green · 2013-01-16 5:36 pm

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 · 2013-01-16 5:55 pm

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

Salectric · 2013-01-16 6:03 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 · 2013-01-17 5:38 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 · 2013-01-17 7:17 am

Thank you fro your replies, they where very helpful.

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