Tested 93% ip and 99% gm on an Amplitrex AT1000 tube tester (as photographed).
Item Tag: GROOVE TUBE
GROOVE TUBES ST-5751-M TUBE SILVER SERIES NEW IN BOX MAXI PREAMP TESTED
Tester 5751 Expected Gain (Mu) value = 70. SEE VIDEO TO HEAR TRIODE TAP TEST! TESTED ON A MAXI PREAMP II TUBE TESTER FOR GAIN(Mu), TRANSCONDUCTANCE(Gm) AND NOISE(dB). Gain(Mu) Section A = 71.8. Gain(Mu) Section B = 65.5.
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Pair 6SN7GTB Channel Master NOS gray ladder plate/top D getter Tubes, Japan
Gray Ladder Plates. Vacuum Tubes. NOS one reboxed. ‘Matched’ refers to comparing the gm test results between the lowest to the highest of the identical sections of a set of tubes. ‘Matched’ I consider to be within 10%.
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FENDER GROOVE TUBE SOVTEK 12AX7WC VINTAGE pair Tubes Excellent Strong
The Fender Groove Tube Sovtek 12AX7WC vintage pair tubes are known for their strong and excellent performance. Made by the brand Groove Tube, these ECC83 type tubes are modeled after the classic 12AX7WC design. With a vintage appeal and a reputation for reliability, these tubes are perfect for vintage audio and video enthusiasts looking to enhance their sound experience with authentic components.
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1X Groove Tube 12AX7 / ECC83 – Amplitrex Verified – 30 Day Returns
1X Groove Tube 12AX7 / ECC83 – Amplitrex Verified See Pictures for sample Test Scores – Please note that the Groove Tube you receive will include printed test scores in the 85% to 100% plus spec range. All tubes are tested and matched on the Amplitrex AT1000 digital tester, in Fixed Bias mode. Buy with confidence – I accept 30 Day returns. For best results – before you install your tubes be sure that your power is off, that the tube sockets are tight and cleaned periodically with a product like Detoxit 100%.