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Old 12th March 2007, 01:53 PM   #1
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Default To SRPP or not?

I have searched the threads but of course the debate rages... Whats the lowdown on SRPP... vs Cathode follower (with regards to a 6sn7 preamp) and what if you convert the srpp into a true ccs? what then. Is this all about cancellation of the second harmonics and harshness (read odd order harmonics)
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Thanks for your help
Nick
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Old 12th March 2007, 02:45 PM   #2
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Default Briefly...

SRPP has gain; a cathode follower generally has about 1dB loss. SRPP doesn't have the full gain of mu, so it has significantly higher distortion than a mu-follower. The distortion of the lower valve has to be very low before there's any cancellation with the upper valve (effectively a cathode follower), so that means that only mu-followers need apply for cancellation, and even then the effect is barely noticeable.
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Old 12th March 2007, 03:01 PM   #3
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They have low output impedance BUT that doesn't mean they can source unlimited current.
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