IntroductionCT1-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.FeaturesCeramic 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.FeaturesBrand: Douk AudioModel: CT1-BOXDC Plug: 5.5/2.2 mmLength of tube socket cable: 23cmMaterial of tube socket: ceramicRange of current meter: 100mADimensions of box (W*D*H): 150*106*70mm / 5.90*4.17*2.75inNet weight: 500g / 1.10lbPackage weight: 1000g / 2.20lbHow 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 List1 Pair × Probe Tester1 × Current Meter Box
| Weight | 0.8 kg |
|---|---|
| Dimensions | 23 × 20 × 12 cm |
| DOUK AUDIO Model | CT1-BOX |
| Maximum Power Per Channel | NO POWER |
| Package | Yes |
| Channels | 2 (2.0) |
| Certification | CE |
| Model Number | CT1-BOX |
11 reviews for Nobsound 8-Pin Dual Bias Current Probes Tester+Dual Large Ampere Meter for EL34,KT88,6L6,6V6,5881,6550,KT66,KT100,KT120 Tubes
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Shopper –
Everything is great, works wonderfully, thank you.
M***a –
Looks beautiful and well finished. I am currently testing it and everything is fine! Beautiful meters, very happy with it! It was also shipped in record time, only three days, absolutely excellent! Thank you seller!
M***a –
It arrived without issues and within the established time. Good product.
Shopper –
Everything went well, within the expected timeframe, and the device seems to function perfectly. Thank you very much.
B***h –
Everythig was fine – i’m very happy with the service…
Shopper –
Good tool for push-pull tube amp tuning
L***s –
Nagyon szuper!
Shopper –
Simple and efficient measuring device
Shopper –
Useful tube amp tuning tool!
k***r –
I haven’t used it yet, but i ran a few tests with a multimeter and so far it looks ok.
The unit came in a bag, and inside it, a retail box.
The overall feel of the box, of the inner packaging and of the device is excellent.
The enclosure of the meters is metallic and sturdy, it can be opened by a few screws if need be, it has rubber feet, it is a proper, professionaly made, decent product. The socket extensions seem very well built too.
I’m very happy with this purchase.
P***y –
Rapid delivery, well packed, and working well – this should be very useful!