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The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, which was owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...
12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain.Developed around 1946 by RCA engineers [2] in Camden, New Jersey, under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947.
Continuously transmitting tubes: Maximum anode dissipation in W or kW in Class-C amplifier telegraphy; Pulsed transmitting tubes: Maximum peak anode current in A (number preceded by "P") Rectifiers: Maximum average anode current in mA; Thyratrons: Maximum average anode current: Less than 3 digits: in mA; 3 or more digits: 1st digit: =0 – in mA
6V6S – A modern production, large plated tube, heater current 500mA, with a higher plate and screen voltage rating. Made by JJ Electronic. 6V6GT(A)(B)-STR – Modern production valve, STR signifying "Special Test Requirement." Claiming to be heavy duty, suitable for high plate voltage. Military specification 6V6 tubes and their equivalents
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.
All amps are individually made: "it's possible that no two Trainwreck amplifiers actually have the exact same circuit". They are usually equipped with three 12AX7 preamp tubes. [10] Fischer made three kinds of models: Express; two EL34 or two 6V6 output tubes. Two 12AX7 preamp tubes and one 12AX7 phase inverter. (Highest-gain amplifier in the ...