(!!!) (Best Single) EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 (10ma) (mic)
$89.99
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EC92=6AB4 Siemens Halske Germany branded Mullard NOS 1964 10ma Gm=5700 Tested on Amplitrex: Vplate=250V Vgrid=-2V Good Ma range 7.5-10ma Good Gm 5000-6000 (low noise, balanced, nice detail and extension)
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