Posted by Damir [ 213.202.110.114 ] on February 16, 2006 at 07:43:02:
In Reply to: Re: Cascode....hmmmm...have you considered/tried posted by Damir on February 15, 2006 at 15:27:53:
Today I tried A/B test with 4,7µ Mundorf Supreme coupling cap and 0,47µ Auricap "in front of" the grid choke. Larger cap (Mundorf) has "silky" highs, and somewhat "soft" sound, but detailed. 0,47µ Auricap has more "punch" and "harder", more "dominating", but little "rougher" sound.
With little help of test CD I measured bass response of both combinations (anode out of CCS-ed 6J5GT), and 0,47µ / grid choke combination has little bass boost on 20Hz, about 0,84 dB. This resonance started at about 160Hz, and has it`s peak probably somewhere around 4-5Hz, but I don`t have <20Hz test tones. "Larger" combination (4µ7 cap) gives less then 0,3dB boost on 20Hz.
Resonances are probably part of the reason for very different sound in both cases, along with difference in materials/manufacturing...
Again, no test instruments... 
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