2x TESLA EL51
You are bidding on a matched pair old-production TESLA EL51
audio frequency power pentodes
These are huge tubes capable of delivering 45W of power, two of these in
a balanced circuit at 750Va will deliver 140W of power!
These are one
of the biggest audio output tubes made (up to with EL151, EL156, F2A
etc.)
Tubes are never used a come in original carton boxes!
Tubes are matched by emissions, by batch and datecodes.
Tested:
Tube1: Ia = 103 mA ; S = 14 mA/V
Tube2: Ia = 107mA ; S = 14 mA/V
Datecode: 6/1956
Extremely high quality audio tubes for hifi/high-end/guitar amplifiers.