![]() ![]() by the MOV ( Marconi-Osram Valve) subsidiary of G.E.C, also labelled as IEC/Mullard, and, in the U.S., Genalex Gold Lion. The KT88 was introduced by GEC in 1956 as a larger variant of the KT66. The screen grid is sometimes tied to the anode so that it becomes effectively a triode with a lower maximum power output. I don't have any trouble with the test probes for 6L6 or E元4 as when there break i cut into the side and replace or repair the wires. I have the TAD bias master, Great Piece of kit. The transmitting tubes TT21 and TT22 have almost identical transfer characteristics to KT88 but a different pinout, and by virtue of their anode being connected to the top cap have a higher plate voltage rating (1.25 kilovolt) and a higher power output capability of 200 watts in class AB1 push–pull. Works on most octal socket tube amps Small enough to carry in most guitar cases Requires no power source other than amp its plugged into No expensive. Want to make my own Biasing test probe for EL84. A KT88 push-pull pair in class AB1 fixed bias is capable of 100 watts of output with 2.5% total harmonic distortion or up to about 50W at low distortion in hi-fi applications. All well and good I thought until today when I was trying to bias my recently purchased 2558 and the bias voltage would only adjust to -35V, it wouldnt get to -37V. i.e set the grid voltage to between -37V and -42V. It is one of the largest tubes in its class and can handle significantly higher plate voltages than similar tubes, up to 800 volts. Ive always biased my amps using the grid voltage method - This was how a Marshall tech told me they do the amps. Specifically designed for audio amplification, the KT88 has higher plate power and voltage ratings than the American 6550. The KT88 fits a standard eight-pin octal socket and has similar pinout and applications as the 6L6 and E元4. Super Radiotron Valve Manual, Amalgamated Wireless Valve Co. Create the virtual guitar rig of your dreams. ![]()
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