1 low noise tube) JG-6072 GE triple mica black plates "O" getter NOS 1962 in white box

1 section) 2.9ma Gm=1700

1 section) 2.3ma Gm=1500

Tested on Amplitrex 

Vplate=250V

Vgrid=-4V

Good Ma range = 2 - 3ma

Good Gm range = 1500

• sE Electronics Z5600a II Tube Microphone
• Warm Audio WA-251
• Fender Bassman 1953
• Korby Kat
  - Telefunken 251
  - Silvaweld SWC 450 preamp
  - Peluso P12 mic
  - Kondo M-1000 and Kondo KSL-M77
  - Kondo Kassai Silver amp
  - Kondo KSL-Kegon Power Amplifier
  - Avantone cv12
  - Rode mic (Classic I)
  - Audio Note L3 phono
  - Ongaku
  - AKG C12 1950's
  - AKG C12 VR
  - Soundelux U95
  - Soundelux E251C
  - Soundelux ELUX 251 (recreates the sonic beauty of the Telefunken ELAM 251)
  - Electronaut M63 mic preamp 2010
  - Pearlman Microphones TM 250 (like E LAM 250)
  - Lawson mic
  - Chunger C12 clone