Telefunken AC701K Tube.
Tested with Funke W20 tube tester. Emission Ia=2,4 mA , new is 2,1 mA. Then soldered in the Neumann M49 microphone and tested after 24 hours of power. Tube ringing, therefore the tube is not suitable for use in a tube condenser microphone.

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Listed12 hours ago
ConditionFair (Used)
Fair condition gear should function but will show noticeable cosmetic damage or other issues.Learn more
Brand
Model
  • AC701K Tube #2
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Retrosonic Pro Audio

Tallinn, Estonia
Joined Reverb:2016

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