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In Reply to: Will be same as triode connection curves. nt posted by sser2 on September 27, 2005 at 12:06:17:
Hi.I start to see your "common sense" reasoning. But I am not saying pentode UL transfer curve is IDENTICAL to its triode mode. But it gets pretty close to triode.
Let's take a look at the dynamic charateristic curves of 6SJ7 pentode & triode-strapped (with the same B+ 250V, Rl=250kR, Vgs=22.5, Ib=0.5mA) with slope factor added. We can see both pentode & triode strapped curves are virtually identical & very linear per
a typical triode."The general treatment & the calculation of gain (of pentodes) are identical with those for ideal dynamic characteristics as applied to triodes. In the case of pentodes, the operation can be kept outside
the grid current region, without any other loss, by selecting a suitable screen voltage." - extract from RDH.Good listening
cheap-Jack
Sept 28, 2005.
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Follow Ups
- Dynamic curves of a pentode vs triode. - cheap-Jack 11:35:29 09/28/05 (0)
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