Do MC carts sound better than MM ones? - Page 3

Geek · 6th October 2009, 06:12 AM

Given that I have not heard an RIAA pre that does not suck in some way or another, I can't answer this honestly

Cheers!

BudP · 6th October 2009, 06:17 AM

Boy, and isn't THAT always the case. I have a really great one here, built by a talented person (so we know it 's not me), sounds just magnificent, and, it hums. No matter that the power supply is remote, no matter that it is triple shielded, no matter that there is no measurable ripple in the riaa box, it hums.

Bud

Salas · 6th October 2009, 06:24 AM

Is it valve mc with step up?

BudP · 6th October 2009, 06:31 AM

Oh yes and I have tried at least a thousand different ways to ground the turntable, which is one of those devilish Yamaha, straight line tracking, 350 series devices.

I have even wound up some step up coils and by passed an entire stage of tubes, to no avail and no better sound either. If it just wasn't so good sounding....

Bud

Salas · 6th October 2009, 06:33 AM

Will PM you, maybe I can be of help.

SY · 6th October 2009, 09:41 AM

Quote:

Originally Posted by Geek

Given that I have not heard an RIAA pre that does not suck in some way or another, I can't answer this honestly

Cheers!

I thought your 6AQ4 circuit looked promising. I've got a new one which will be published shortly that might suck somewhat less...

Geek · 09:46 PM

Quote:

Originally Posted by SY

I thought your 6AQ4 circuit looked promising. I've got a new one which will be published shortly that might suck somewhat less...

It's the second best one I've heard so far, but I already even got bored with it!

This was the last one I played with:
http://geek.scorpiorising.ca/GeeK_Zo...46141#msg46141

I actually want to try a power MOSFET (

) as the input device... these IRF 5/6/710 devices sound pretty good and lowwww capacitance.
(Darn you Nelson Pass, you are getting me into SAND!

)

Cheers!

SY · 6th October 2009, 09:49 PM

Why do you have the LEDs in the cathodes paralleled? This splits the current (unevenly) and raises the impedance of each device faster than paralleling reduces it.

I've done a few experiments with power MOSFETs, but with very unsatisfactory results to date. Lots of 1/f excess noise.

Geek · 6th October 2009, 10:01 PM

Quote:

Originally Posted by SY

Why do you have the LEDs in the cathodes paralleled? This splits the current (unevenly) and raises the impedance of each device faster than paralleling reduces it.

Current handling.

I found using the diode test on the DMM can match and LED so closely for this purpose, imbalance is in the microamp range

Quote:

I've done a few experiments with power MOSFETs, but with very unsatisfactory results to date. Lots of 1/f excess noise.

Serious? Hmmmm...... maybe we'll keep the fets for line level >_>

Cheers!

SY · 6th October 2009, 10:03 PM

Really? Most red leds have a ~30mA rating.

View Poll Results: well, do MC carts sound better than MM ones?
yep	52	69.33%
nope	23	30.67%
Voters: 75. You may not vote on this poll

6th October 2009, 09:49 PM	#28
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Why do you have the LEDs in the cathodes paralleled? This splits the current (unevenly) and raises the impedance of each device faster than paralleling reduces it. I've done a few experiments with power MOSFETs, but with very unsatisfactory results to date. Lots of 1/f excess noise. __________________ “There are no greater liars in the world than quacks, except for their patients.” - Benjamin Franklin

6th October 2009, 10:03 PM	#30
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Really? Most red leds have a ~30mA rating. __________________ “There are no greater liars in the world than quacks, except for their patients.” - Benjamin Franklin

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6th October 2009, 06:12 AM	#21
Geek diyAudio Member Join Date: Sep 2004	Given that I have not heard an RIAA pre that does not suck in some way or another, I can't answer this honestly Cheers!

6th October 2009, 06:17 AM	#22
BudP diyAudio Member Join Date: Feb 2007 Location: upper left crust, united snakes	Boy, and isn't THAT always the case. I have a really great one here, built by a talented person (so we know it 's not me), sounds just magnificent, and, it hums. No matter that the power supply is remote, no matter that it is triple shielded, no matter that there is no measurable ripple in the riaa box, it hums. Bud

6th October 2009, 06:24 AM	#23
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Is it valve mc with step up?

6th October 2009, 06:31 AM	#24
BudP diyAudio Member Join Date: Feb 2007 Location: upper left crust, united snakes	Oh yes and I have tried at least a thousand different ways to ground the turntable, which is one of those devilish Yamaha, straight line tracking, 350 series devices. I have even wound up some step up coils and by passed an entire stage of tubes, to no avail and no better sound either. If it just wasn't so good sounding.... Bud

6th October 2009, 06:33 AM	#25
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Will PM you, maybe I can be of help.

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