Gain and gm of a QQE03/20 anyone ?? - diyAudio
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Old 1st April 2013, 05:57 PM   #1
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Default Gain and gm of a QQE03/20 anyone ??

I am toying with the idea of building a spud amplifier using the QQE03/20 applied to the original Schade feedback arrangement. Since this valve is designed for radio duty applications none of the datasheets seem to publish the gain or gm of this valve. Anyone with any experience care to suggest values.

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Old 1st April 2013, 06:14 PM   #2
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http://www.r-type.org/pdfs/qqe03-20.pdf
2*10W Pa, interesting

http://frank.pocnet.net/sheets/183/q/QQE03-20.pdf
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Old 1st April 2013, 06:16 PM   #3
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Just looked again and the values are g1g2 of 8 and gm of just 4.5mA/V.
This makes it far from a great candidate for this application.

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Old 1st April 2013, 06:42 PM   #4
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Seems the only candidates are;
QQV2-6 10.5mA/V ug1-g2 31
QQV04-16 10.5 mA/V ug1-g2 26

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