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Old 27th March 2010, 03:44 AM   #1141
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The Scope is a UNI-T 2042C.
I think the slight downtilt comes from the 2uF cap i use between the MPP and the Inductive RIAA ( 47kOhm Input Impedance) and the Inductive RIAA has a small lokal rise of 0.5dB at 20Hz. Same result on the DAAS. The serial resistor in series with the inductor could be finetrimmed but i kept it that way because i like the sound very much.
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Old 27th March 2010, 03:51 AM   #1142
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One last try-
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Old 27th March 2010, 03:58 AM   #1143
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well yes, when i correctly remember the Inductive RIAA had a very slight downtilt from bass to treble on the DAAS. On my system that is not shy in treble it sounded swell.
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Old 27th March 2010, 04:11 AM   #1144
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Yes, I was remembering so too. If the 2187us, 750us, 318us are met, then slight tilt tailoring can be benign to the correct proportion of overtones to fundamentals. But synergistic overall. Has to do with the majority of MC carts passing supersonic from tip mass on vinyl resonances maybe. Beyond the usual last octave mount. Some speakers do tease easily if excited up there. Not directly, sounds like 3rdH.

P.S. Send me the pics to have a try uploading 4U.
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Old 27th March 2010, 04:19 AM   #1145
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Have send the pictures.
My Titan has a slight rise in the treble that gets less towards the inner groove.
The third or forth song on an album usually sounds best. Has to do with tonearm geometry ( has minimum error there) and record flattness too that gets better towards the inner when you think about it.
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Old 27th March 2010, 04:26 AM   #1146
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In general a slight tilt like 0.1dB to 0.2dB maybe can be evaluated like no big deal on first thought, but when spreading over 10 octaves can have much more of an impact. Who ever tuned a speaker can understand.

Here are Joachim's awesome vintage valve meter's readings for 1kHz and 200kHz left to right. Were just too big that is why they would not upload. I reduced them to 1024x748.
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File Type: jpg Level at 1kHz.jpg (187.8 KB, 344 views)
File Type: jpg Level at 200kHz.jpg (208.9 KB, 336 views)
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Old 27th March 2010, 04:33 AM   #1147
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Again the 7dB 450kHz picking for easy comparison.
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File Type: jpg 7dB Peak at 450kHz.jpg (186.0 KB, 325 views)
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Old 27th March 2010, 04:34 AM   #1148
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Thanks Salas ! I go to bed. New adventures tomorrow.
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Old 27th March 2010, 04:34 AM   #1149
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See ya!
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Old 27th March 2010, 12:48 PM   #1150
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Joachim,
What do you have that can measure caps reliably to better than 0.5%?

Regards, Allen
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