how to see if a Mullard 12ax7 reissue is long or short plate - diyAudio
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Old 16th January 2013, 04:36 PM   #1
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Default 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 ?
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Old 16th January 2013, 04:55 PM   #2
kevinkr is offline kevinkr  United States
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The length of the plates themselves, there should be plenty of photographic examples online to allow you to verify this.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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Old 16th January 2013, 05:03 PM   #3
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Take a look at the Mullard photos on the website. They clearly show the difference between long and short plates.
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Old 17th January 2013, 04:38 AM   #4
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The reissue (Russian) Mullard 12AX7 is the exact same tube as the Sovtek 12AX7LPS, which are both long plate, with a spiral filament.
"No man really becomes a fool until he stops asking questions" - Charles Proteus Steinmetz
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Old 17th January 2013, 06:17 AM   #5
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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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