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Valves / Vacuum Tubes
6h30Pi
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<blockquote data-quote="Ampdog" data-source="post: 373141" data-attributes="member: 144"><p>As Handsome said.</p><p></p><p>Just a general indicator, though. Particularly with triodes, one needs to keep in mind that transconductance is related to anode current. Data for 6h30 shows high transcondictance of 12 mS - but at an anode current of 40 mA. Data is scarce - I could not find the determining graphs of parameters vs. anode current. It would appear that for the same anode current (round about 5 mA) the 6h30 gm is about 20% higher than for 6GC7.</p><p></p><p>6h30 is different from 6CG7 - it is not 'rollable'. E.g. for Va=140V, Ia=5mA, bias for 6CG7= -4V, bias for 6H30= -10V. But as said 6h30 can make a good driver, particularly at high Ia. (I believe there is also a stiff cost difference!)</p></blockquote><p></p>
[QUOTE="Ampdog, post: 373141, member: 144"] As Handsome said. Just a general indicator, though. Particularly with triodes, one needs to keep in mind that transconductance is related to anode current. Data for 6h30 shows high transcondictance of 12 mS - but at an anode current of 40 mA. Data is scarce - I could not find the determining graphs of parameters vs. anode current. It would appear that for the same anode current (round about 5 mA) the 6h30 gm is about 20% higher than for 6GC7. 6h30 is different from 6CG7 - it is not 'rollable'. E.g. for Va=140V, Ia=5mA, bias for 6CG7= -4V, bias for 6H30= -10V. But as said 6h30 can make a good driver, particularly at high Ia. (I believe there is also a stiff cost difference!) [/QUOTE]
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Audio and Video Talk
Valves / Vacuum Tubes
6h30Pi
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