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Old 5th January 2003, 05:11 PM   #11
Chris is offline Chris  Norway
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Hi Peranders

Yes Nemko would most certainly their heads if they could see
the wiring. Thats why I`m in the process of making it better right now... No more unisolated parts !!!
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Old 6th January 2003, 10:38 AM   #12
Mad_K is offline Mad_K  Norway
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Actually, it says;

"Recommended load capacitance: 200-400 pF" on the ortofon website...
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Old 5th June 2003, 01:38 PM   #13
Cobra2 is offline Cobra2  Norway
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Default Even when the sun is shining...

As a "hard-core DIY'er", I have kept on.... And now;

QSXM3 (PerAnders' design).
Just finished the board, on test now :-)

Arne K
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Old 5th June 2003, 01:54 PM   #14
Electrons are yellow and more is better!
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Does it work yet?

Arne, do you have DC-servo PLUS capacitor? Either one fat mama or DC-servo. Check carefully how you choose between "Linear Tech original" and "P-A original" feedback network.Check here and the part about DC-servo.

Note also parts for optional compensation.

We had a diy party when we used my monster QSXM2 together with a homemade TT with tangential arm. Look at the painting of the TT! I thought it was plastic imitation.

We hadn't time to REALLY listen to the amp or TT but it didn't sound bad anyway. The power came from two norwegian Mascot lab PS, not very high tech.

http://www.hififorum.nu/topic.asp?TOPIC_ID=14408
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Old 5th June 2003, 02:29 PM   #15
Cobra2 is offline Cobra2  Norway
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Default Yes, it works

Even being a bit "over-stuffed" !

Have to verify the parts-count again...too many options...

BTW, may I also have a few more dB (4-5) gain on MM?
And how much gain is it set up for on MC?

Arne K
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Old 5th June 2003, 05:15 PM   #16
Electrons are yellow and more is better!
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I suggest that you make the DC-servo working as intended, remove the C11, C12, C13. Use not R5, R23.

You may otherwise get the "golden ears" haunting you. You must achieve accurancy below 0.1 dB!

More gain:

MM R6, MC R4. Half the value double gain = 6 dB

MC has 20 dB more gain. Note the differnce between R6 and R4.
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Old 5th June 2003, 05:36 PM   #17
EC8010 is offline EC8010  United Kingdom
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Quote:
Originally posted by Chris
The sound is nice. Good soundstage, relaxed but dynamic..
However it has a somewhat enhanced s-sound.
The Ortofon OM10 is a bit sibilant, that's almost certainly the cause of your "enhanced s-sound." I had an OM10 in an SME3009 S2, and had the same problem, so I changed the stylus for an OM30 stylus (the bodies are identical), and the problem went away.
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Old 5th June 2003, 05:46 PM   #18
Cobra2 is offline Cobra2  Norway
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Default Re: QSXM3

Will do, PerAnders, have not listened to it yet, more than confirming that it works, and is very quiet :-)

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Old 5th June 2003, 07:35 PM   #19
Mad_K is offline Mad_K  Norway
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Quote:
Originally posted by EC8010


The Ortofon OM10 is a bit sibilant, that's almost certainly the cause of your "enhanced s-sound." I had an OM10 in an SME3009 S2, and had the same problem, so I changed the stylus for an OM30 stylus (the bodies are identical), and the problem went away.

Yepp, I did the excact same thing
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Old 6th June 2003, 12:03 AM   #20
Cobra2 is offline Cobra2  Norway
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Default Re: QSXM3

And it also sounds great ! Now, I need to find a home for it (chassi).
A little gain-adjustment 100ohm -> 75ohm was what I needed.
All components are matched, even had to order another 10 of the RIAA caps for getting a match...

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