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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: I concede your point after thinking about it posted by Russ57 on August 2, 2007 at 09:51:46:
that the paraphase has two consecutive grounded cathode stages in the non-inverting (actually twice-inverting) channel, whereas the LTP has a cathode follower followed by a grounded grid stage in its non-inverting channel.The paraphase can be difficult to balance and may never give really good balance across the audio spectrum, especially as the tubes age. It seems insufficiently stable to me.
The OP signals from an LTP, on the other hand, can be pretty well balanced for ever, by using a good CCS in the tail with well-matched plate loads. The balance does not depend upon the gain in each half; in fact, you could use dissimilar tubes and it would still work!
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- I think the difference is . . . - Ray Moth 08/3/0700:52:03 08/3/07 (0)
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