Quote:
Originally Posted by puresp
Am I wrong when I think that MC pickups (cartridges) use all 4 tubes? The two middle ones (in C2500) to boost the weak MC signal to MM strength and then the two on the left also used by MM pickups. The latter is the RIAA amplifier. Otherwise how would you make the RIAA correction when using MC pickups?
Edit: Had a look at the diagram on top of the C2500 and it seems I was wrong. I guess it means the amplifier must have two parallel RIAA correction stages?
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As the top glass reflects,
2 each for Line
2 each for MC
2 each for MM
The MM & MC operate independently -- depending on cartridge type your using. There is no combining of the signal where the signal would also use the other 2 phono tubes.
RIAA is performed in the phono circuitry of the two different phono preamplifier circuits.
Best sir,
Bob
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Last edited by vintage_tube; 06-25-2017 at 09:24 AM.
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