Parks Audio Waxwing measurements

[Balle Clorin]

b) A digital toolkit for my MP-500, so I can track cartridge hours, reduce the capacitive loading (L-590AXII is hard set to 320 pF)

320 pF is crazy high, but I could not find any capacitance information anywhere..

 

[watchnerd]

Wouldn’t it be just as simple as using a phono stage with lots of headroom and the waxwing as line in DSP box ..
just a suggestion for everyone that is complaining about the lack of headroom.

I've started playing with this using my Puffin.

Using it as a headamp with only 24 dB of gain for MC carts, no RIAA eq, and DSP tools.

Same for MM carts, but with 0 db of gain.

 

[Salt]

Interesting approach to a wholly grail of enthusiasts.
There was a discussion here about stabilisation of stylus by Preamp input configuration?

 

[watchnerd]

320 pF is crazy high, but I could not find any capacitance information anywhere..

I asked their support years ago when I was purchasing for more info on the specs of the phono stage. From email:

"Luxman factory specifications for both L-509x and L-590aXII are identical as follows:

• Input Capacitance = 320pF (fixed, non-adjustable)
• MM input impedance = 47k Ohms (fixed, non-adjustable)
• MM input sensitivity = 2.5 mV (nominal average) for full amplifier output.
• MC input impedance = 100 Ohms (fixed, non-adjustable, suitable for MC cartridges having an ~approximate~ internal coil impedance range of 3- 40 Ohms)
• MC input sensitivity = 0.3 mV (nominal average) for full amplifier output."

SME also said, re: the cable that came with my M2-9R:

"The arm lead capacitance for this arm is 58pF"


So that means 378 pF loading that is unavoidable if I use traditional MM route.

 

[watchnerd]

Interesting approach to a wholly grail of enthusiasts.
There was a discussion here about stabilisation of stylus by Preamp input configuration?

Are you referring to Azimuth adjustment?

Or cartridge loading?

 

[Salt]

It was about cartridge loading if memory serves correctly.

 

[Salt]

Found the thread. It was discussed around this post: https://www.audiosciencereview.com/.../phono-preamp-headroom-why.56265/post-2066165

 

[watchnerd]

Found the thread. It was discussed around this post: https://www.audiosciencereview.com/.../phono-preamp-headroom-why.56265/post-2066165

Perhaps I'm misunderstanding what you're asking, but that seems to reiterate that (for MC carts) changing the loading doesn't do anything meaningful, electro-mechanically.

 

[Salt]

Perhaps I'm misunderstanding what you're asking, but that seems to reiterate that (for MC carts) changing the loading doesn't do anything meaningful, electro-mechanically.

So I understand that, too, but there were different opinions in the discussion (that I, to be honest, don't understand completely in all technical aspects ).

 

[watchnerd]

So I understand that, too, but there were different opinions in the discussion (that I, to be honest, don't understand completely in all technical aspects ).

The test data in the recent Stereophile article on loading backs up the theory that MC loading changes to R doesn't do much except change the output level.

 

[Balle Clorin]

I have measured MC with internal resistance if 12 ohm ATOC9MLii and found noe change in response apart from revel reduction at lower R, distortion and crosstalk and tracking unchanged too.


Edit

47k increased noise level.

 

[Balle Clorin]

Effect of loading on MC cartridges.
Post in thread 'Ultrasonic ringing in low output MC cartridges'
https://audiosciencereview.com/foru...n-low-output-mc-cartridges.58099/post-2125633