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Fatman i-Tube MKI / II Vacuum Tube Upgrade Kits

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Choose Your Grade of Vacuum Tubes –  6N1 (2) Standard, Premium or Elite & a 6E2 Magic Eye Indicator Tube.

A Complete 6N1 Upgrade Vacuum Tube Kit for the Fatman iTube mki and mkii Amplifier. The kit contains matched 6N1 Pair Upgrade plus the 6E2 Magic Eye Volume Indicator.

Our  6N1 and 6E2 Vacuum Tubes are also available seperately.

We Stock 6N1 Tube Equivalents 6N1P, 6N1P-ev & 6N1P-v (Elite).

Due to USSR military Specification, they make a superb Upgrade.

1.Standard: 6N1P by former Novosibirsk (NEVS) Plant, Russia c.1980s NOS. is a capable well made vacuum tube which will deliver good results. 2000 Hrs Life Expectancy

2.Premium: A ruggedized 6N1P called 6N1P-ev by former Voskhod Factory, Russia c.1980s. These are the famous ‘Voskhod Rockets’ and were made to Military Specification including nickel plated pins for good conductivity and gold grid for improved sound. Life expectancy 5000hrs. A well made vacuum tube which will deliver excellent results and reliability.

3.Elite: A rare 6N1P Military variant from the 1960s to early 1970s known as 6N1P-v by Former Voskhod & Reflektor Plants, (USSR) Russia. These are an outstanding vacuum tube built to military specification and nickel plated pins for improved conductivity. They contain large amounts of rare earth metals such as Caesium and Gold, now too expensive and scarce to employ in modern tubes. These rare earth metals improve both odd and even harmonics and will therefore sound superb in any 6N1P application. These are sold strictly subject to availability and may not be restocked once current supplies diminish.

Above all, our Fatman iTube MKI and MKII vacuum tubes are Fully Bench tested. Certainly No Leaks or Shorts.

As a result of their high specification, they are extremely robust.

Life expectancy of 5000 hrs.

Military grade also means improved tighter and deeper bass!

Open mid-range, detailed treble, better timing and overall cohesion can be expected.

Free 2 x BS310 Set of silicone anti-vibration dampers.

Full fitting instructions included.

If you are unsure about your Amplifier’s requirements you can download a .pdf User Manual for free here

*Never buy these tubes from an untrusted source. Vintage tubes may cause serious damage when untested.

 Tested in the UK. Full 30 Day Guarantee. No lengthy returns or customs duties!



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Additional information

Weight 0.26 kg
Returns & Delivery

We offer a No-Quibble 30 -Day Return & Refund on all our Products. Please refer to our Return & Refund Policy for full details.

We aim to ship next Working Day by your chosen Postal Service. See our Shipping Policy for further details.


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