NOS matched pair of Genelex (Marked Mullard IEC) KT-88 power tubes. The orig boxes were not available when I received them, but the tubes have not been used other than on testers. Flashing is perfect with 3 total getters. Black plates with support rods. Tested for transconductance on a calibrated Hickok 539C and for current draw on a custom made matching tester. Testing for current draw was done with both tubes together on the tester…as in an amp under load. Readings show a 97.2% match on current draw.
Test parameters: 400 vdc plate voltage with G1 bias voltage of -40.0 vdc.
Minimum transconductance value on the 539C is: 6250 mmhos.
Tube 1: 12500 mmhos and 55.2 ma. Date code: 1022-652 (1976)
Tube 2: 12500 mmhos and 53.6 ma. Date code: 1022-720 (1977)
Price is $700.00 for the Pair....not each one!
Preferred payment is by Money Order, Cashiers check, Personal check with hold (USA only). Any purchase outside the USA must be in USD drawn on a US Bank. NO PayPal due to their political interference.
Tubes will be packed very well! Shipping cost is actual dependent on ZIP code. Insurance is mandatory.
If you have any questions about these tubes....please ask. Thanks!