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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
His Master's Noise: A Thoroughly Modern Tube Phono Preamp
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Old 24th July 2010, 04:37 PM   #41
sonidos is offline sonidos  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
I live approximately six miles from SY and after several months, we finally had time for personal introductions and I spent a rewarding evening listening to SY's 'Noise'. We got down to business right away. We switched liberally between CD and vinyl. Fortunately, no brain probes were involved. Lucky me!

If anyone has inquiries regarding buzzing, hissing, humming, or downright rude noises coming from his concoction, let me lay all doubts to rest. It was quiet. VERY quiet. Now I did not go to the speakers and lay my ear next to either one, but I never listen that way!

So I ended up having to fight the urge to drool because the music was very enjoyable and SY can attest that my full attention was on the music. In conclusion, I will do everything in my power to convince SY to finish his MM version. My guess is that it would make some great noise in my personal system!

Thanks, SY for the invitation!
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Old 24th July 2010, 05:35 PM   #42
SY is offline SY  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
Delighted to have you over! Having Stevie Ray Vaughn albums tucked under your arm was a sure sign of class.

Your Rega will be a perfect guinea pig (non-Peruvian) for it.
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Old 24th July 2010, 05:57 PM   #43
Pano is online now Pano  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
They eat Guinea pigs in Peru, so be careful!
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Old 24th July 2010, 07:19 PM   #44
sonidos is offline sonidos  United States
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I know Pano! My wife is Peruvian.

SY just wants my ears and the audio interpreter between them. gulp!
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Old 12th October 2010, 03:03 AM   #45
jackinnj is online now jackinnj  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
I'm thinking something like this -- the board splits in half (use your band saw or some aircraft snippers):

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Old 20th October 2010, 03:32 AM   #46
jackinnj is online now jackinnj  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
Default On a PCB

Here's HMVS on a PCB -- the Sowter trafos not yet mounted:




Last edited by jackinnj; 20th October 2010 at 03:44 AM.
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Old 22nd October 2010, 11:16 AM   #47
Skorpio is offline Skorpio  Denmark
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Very nice article, thank you!

Any reasons for using the output buffer instead of taken the output from the source of the lower DN2540 at the CCS second stage?
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Old 22nd October 2010, 01:03 PM   #48
SY is offline SY  United States
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His Master's Noise: A Thoroughly Modern Tube Phono Preamp
That's another valid design path which I didn't explore. I like esthetically to use tubes exclusively as the signal amplifiers in this design, there's an extra tube section available, and I've had great luck with ECC88 cathode followers. But one might get an equally excellent result using (effectively) a source follower. The downside is that it reduces the effective plate load, though I suspect not enough to materially affect the circuit performance (haven't measured or simmed the effect of the load shunting the source to ground).
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Old 22nd October 2010, 01:08 PM   #49
luvdunhill is offline luvdunhill  United States
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SY, I was surprised about how dead quiet this thing was last night, combined with the tube headphone amp I brought. I cranked the thing with the needle up and couldn't hear a thing over the din of the party. Amazing!
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Old 22nd October 2010, 01:12 PM   #50
SY is offline SY  United States
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Unfortunately, the headphones you left here totally spoiled me. I had been getting by with some cheapies but now... dammit.

Your 'phone amp sounds excellent, BTW. I will need to study this at length.
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