the output valves. Unfortunately, it can provide way too much drive for a sensitive valve like the EL34, and can easily drive them into fairly heavy grid current, as well as cause them to turn off completely. The effects of this will described later. Figure 5 - Phase Splitter (Typical) The circuit may
assumptions may be made as long as the power output of an amp is known: A 50 watt amp with two 6L6 or EL34 tubes, or a 100 watt amp with four 6L6 or EL34s, is a push-pull amp. 100 watts with two KT88 is also push-pull. A small Fender amp with one 6V6 and 3 watts is operating in class A. Class A operation
no-frills design Design by Bob Stuurman This valve power amplifier is a push-pull design using two EL34s (or their 6CA7 US equivalents). It has been kept fairly simple to avoid problems with DIY construction. The output power is well above 35 watts, with low distortion and a wide frequency range. This
Electrical" thermal resistancejunction /solderpoint(typ.) R th JS el 30 K/W 4) page 21 (max.) R th JS el 34 K/W "Elektrischer" Wärmewiderstand Sperrschicht / 4) Seite 21 Lötpad (with efficiencyeη = 15 %) Note: Individual forward voltage groups see next page Anm.: Durchlassspannungsgruppen siehe nächste Seite
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