Tested on an Amplitrex AT1000. (2) Groove Tubes GT-ECC83-S Premium Preamp Tubes | Excellent Condition |.
Item Tag: Groove Tubes
Groove Tubes EL34 6CA7 GT-E34LS Power Vacuum Tube Amplitrex Tested NOS 99%
Tested 93% ip and 99% gm on an Amplitrex AT1000 tube tester (as photographed).
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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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Strong GT GROOVE TUBES GT-12AX7R ECC83 7025 Vacuum Amp Tube 104 FAST SHIPPING
Made in the United States, this unit has been tested for quality and reliability.
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Groove Tubes Gold Series Performance Matched EL34 Power Tubes Duo GT-EL34-MD-L
Groove Tubes Gold Series Performance Matched EL34 Power Tubes Duo GT-EL34-MD-L. 2 each per box.
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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%.