For Sale NOS Sylvania/Philips ECG STR-387 6L6GC / 7581A Matched Pair

[FourT6and2]

NOS Sylvania/Philips ECG STR-387 6L6GC / 7581A matched pair
True 30W 6L6 tubes
Plate Current: 46.0
Transconductance: 5000

Original boxes
Green lettering
Double "OO" getters

None of my amps use 6L6 so I don't need these.

$325 shipped

 

[FourT6and2]

Just tested on a new Maxi-Matcher 2.
Plate voltage: 400v
Bias voltage: -48

For 6L6, expected plate current range is 12-40mA and minimum Gm is 2.2. For reference, brand new TAD 6L6GC-STR have a Gm of 2.42.

Tube 1: 28.8mA / 2.62 Gm
Tube 2: 30.9mA / 2.58 Gm