The EL34 has the rep for being a 17-22 watt amp becaues that the way you see it used in Fenders, Riveras, Torres amps and the like.
But on Wiki is does say -
Specifications
In common with all 'E' prefix tubes, using the Mullard-Philips tube designation, the EL34 has a heater voltage of 6.3V. According to the data sheets found in old vacuum tube reference manuals, a pair of EL34s with 800V plate voltage can produce 90 watts output in Class AB1 in push-pull configuration. However, this configuration is rarely found. More commonly found is a pair of EL34s running Class AB1 in push-pull around 375-450V plate voltage and producing 50 watts output, while a quad of EL34s running Class AB1 in push-pull typically run anywhere from 425-500V plate voltage and produces 100 watts output.
The EL34 is a pentode, while the 6L6, which delivers a similar range of power output, is a beam tetrode which RCA referred to as a beam power tube. Although power pentodes and beam tetrodes are based on different principles of operation and have different internal constructions they are functionally closely equivalent. Unlike the 6L6, (EIA base 7AC) the EL34 has its grid 3 connection brought out to a separate Pin (Pin 1) (EIA base 8ET) and its heater draws 1.5 Amps compared to the 0.9 Amp heater in the 6L6. However, Sylvania (and possibly GE) marketed a tube as 6CA7 which was not only in a markedly different 'fat boy' envelope, but used a beam forming plate much like a 6L6. Examining the mica spacer on the top of the tube will confirm the lack of a suppressor grid. Although these tubes have similar (but not identical) characteristics, they are made very differently.
Matched EL34 Vacuum Tubes by Russian manufacturer, Svetlana
The EL34 was introduced in 1953 by Mullard and its parent company Philips and, although no longer made by them, is manufactured by JJ Electronic, Svetlana and Reflector (Sovtek, Electro-Harmonix and some brands), amongst others. Some firms make a related tube called an E34L which is rated to require a higher grid bias voltage, but which may be interchangeable in some equipment.
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Application
The EL34 was widely used in higher-powered audio amplifiers of the 1960s and 1970s, such as the very popular Dynaco Stereo 70 and the Leak Stereo 60, and is also widely used in high-end guitar amplifiers because it is characterized by greater distortion (considered desirable in this application) at lower power than other octal tubes[citation needed] such as 6L6, KT88 or 6550. The EL34 is found in many British guitar amps and is associated with the "British Tone" (Marshall) as compared to the 6L6 which is generally associated with the "American Tone" (Fender).
But I've never seen a 100 watt, dual EL34 amp.
.
No, you cannot have mine. 
