TWO McIntosh 7591A Tubes / Amplitrex Tested /Strong Plate Current/Close Gm Match
USD 329.00 USD
Specifications
| Brand | McIntosh |
| Type | Vacuum Tube |
| Model | 7591 7591A |
| Country Of Origin | United States |
TWO McIntosh 7591A vacuum tubes. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). 85.6% / 86.8% gm mutual conductance. Tubes test at 8740 and 8860 where 6630 micromhos is pass/fail grade. Tube 1: 8740 micromhos @ 60.6mA plate current emissions.
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