Nobsound 8-Pin Dual Bias Current Probes Tester+Dual Large Ampere Meter for EL34,KT88,6L6,6V6,5881,6550,KT66,KT100,KT120 Tubes

Introduction CT1-BOX is designed by Douk Audio, in order to measure the cathode current of the power tube for bias reading (at low voltage side of the tubes), suitable for EL34, KT88, 6L6, 6V6, 5881, 6550, KT66, KT100, KT120, 7027 etc., equipped with large current meter, easily and distinctly to read. Features Ceramic socket and gold pins for longer service life, tough gold pins with a thick gold plating. Dual larger current meter reader, max test current range up to 100mA. Adopting copper wire to ensure excellent conductivity. Each probe tester is soldered by outstanding craftmanship. Metal case, more solid and with better shielding performance. Features Brand: Douk Audio Model: CT1-BOX DC Plug: 5.5/2.2 mm Length of tube socket cable: 23cm Material of tube socket: ceramic Range of current meter: 100mA Dimensions of box (W*D*H): 150*106*70mm / 5.90*4.17*2.75in Net weight: 500g / 1.10lb Package weight: 1000g / 2.20lb How to use it ? 1. Turn off your amplifier, and connect two probe testers separately to the A and B interface of CT1-BOX. 2. Remove the power tubes, insert them into the bias probe sockets. 3. Insert bias meter probes into the tube sockets of the amplifier. 4. Turn on your power amp, let the tubes get warm about 5 minutes, then read the bias measurement. 5. The left current meter is reading "A" input, and the right current meter is reading for "B" input. If the reading value of both are the same, that's perfect. If not , the difference should be no more than 2mA or 3mA for a good balance between the tubes. Packing List 1 Pair × Probe Tester 1 × Current Meter Box