• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Small tube stash - whats useful?

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Eli Duttman

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Joined 2004
And in the name of getting started on a cheap build, what sort of plate to plate impedance does a pair of 6l6gc's want?
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6.6 Kohms. Both Mullard and Williamson style circuitry incorporate the O/P "iron" in a global negative feedback (GNFB) loop. To prevent O/P trafo core saturation from the low freq. error correction signal extra magnetic headroom above the O/P power produced is necessary. A look at a 6L6GC data sheet shows 40 WPC to be an easy enough goal. Edcor's CXPP100-6.6K O/P trafo will easily fill your need and allow for flirting with even more O/P power. Hammond's model 1650P is another possibility and may be easier for somebody in "Oz" to source.
 
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