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    Building, troubleshooting and testing of these amplifiers should only be
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Let's talk triode-pentode

Lamber

Member
2013-05-05 3:20 am
I recently built the K-12G kit and it comes with 4 10GV8 triode-pentode tubes, 2 for each channel.

Can anyone explain exactly what a triode-pentode tube is? Why do they use them? I'm new to tubes and I haven't been able to find much literature on triode-pentode tubes.

thanks!
 
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Can anyone explain exactly what a triode-pentode tube is? Why do they use them? I'm new to tubes and I haven't been able to find much literature on triode-pentode tubes.

Just what it sounds like: a dual VT that has a triode and a pentode in the same bottle. The small signal types were frequently used as oscillator/mixers for TV and FM receivers. The large signal types were used in color TVs as plate coupled multivibrators and vertical deflection PAs.

The small signal types can be used as paraphase splitters or active regulator error amps; the large signal types can use the triode as a grid driver for the pentode final. Quite a few of these have good linearity and audio performance.