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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: What do they do? posted by abysmillard on July 30, 2002 at 19:44:57:
Hi,the CF's are buffers, high input impedance, so that the line gain stage and any selected source in combination, see an easy load, and don't sag in frequency response / balance terms, helps with noise too.
The cathode follower's output impedance is also low, which allows the VC and line out stage to drive the cabling to and load of your power amp/s again without FR or balance cahnges or noise getting in.
The line gain stages provide you with the capability of matching listening levels on different sources, eg a tuner 400mv 0db out to CDP @ about 2 volts out!
And, secondly to provide neough drive to match with power amps sensitivities ahich can rnage from 125 mv on Leka maps top 2 volts on some big SS mothers.
don't know the preamps so cannot advise on which tubes do which.
BTW good 6SN7's are very nice sounding tubes, blameless, can drive headphones in the right circuit, and David Berning uses thewm in his baby OTL power amp.
What has it done for your music; which music too?
smile
timbo
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Follow Ups
- Re: What do they do? - Timbo in Oz 20:00:39 07/30/02 (2)
- Re: What do they do? - abysmillard 20:17:13 07/31/02 (1)
- Re: What do they do? - Timbo in Oz 21:03:18 07/31/02 (0)
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