Mpp

[Salas]

Yes I actually knew that, that is why I run the pink band 13 L+R that is in the middle of that record, and not the left only pink band track 1. I think that the cartridge manufacturers must be balancing a lot by ear... So you suggest I try 1nF to 10nF shunting my prefered Rload and check out transient subjective distortion in the treble? What kind of cap material you found better at it?

BTW, If anyone has the Cardas ''burn in'' record with the smiling guy plucking the acoustic bass on the cover, please dont use it for FFT, it is skewed spectrum.

[Joachim Gerhard]

tonight i had an idea for two varieties of the MPP that are even simpler.
The input is not a transimpedance stage any more but that has the advantage that other cartridges with higher impedance can be used. The bipolar version has around 250 to 500 ohm impedance depending on the idle current and a 6 dB noise advantage compared to the
un-bypassed MPP. it can be as low as 0.3VqHz. The fet version is slightly noisier and has a high input impedance. noise in the fet version can be reduced by paralleling. i hope this circuits are use full because they are ultra simple and should work well :
i call them ASAP-B and ASAP-F

[Joachim Gerhard]

please do not hammer on my head but i used Epcos MKT. They are made for EMV suppression in cars. they sound excellent and because i was happy i did not try something else. i should try the new MKP´s from Vishey-Röderstein or even a polystyren or teflon cap
i tried the MKPs and Styrens (LCR in england makes them) in my RIAA amps and they are excellent. yes, try 1n - 10n and tell me what you think. your fet riaa may sound very different from my bipolar although i am shure you solved the riaa math successfully.
thank you for alerting me on the cardas, i have it
concerning voicing of cartridges you are right. i watched Mishima San making a cartridge.
he uses a special Stax headphone with very thin foil and i think a self made equalizer. he has a kenwood direct drive with exchangable head shell . he listens a lot to choir music
and tries to deceifer how many voices he can here. then he adjusts the suspension and also puts tiny dots of laquer here and there. it´s amasing the whole space is not bigger the 2qMeters.

[Salas]

To the contrary, I have a couple of Siemens axial MKT 10n ready. Many good MKT are better than many PP. Ask Jadis.
The FFT of the DL103R I have shown is through that fet phono, so no worries. I am having smooth transients even on metallic tweeters I use, but there is always more to look for. Will let you know hopefully tomorrow.

[Salas]

Originally Posted by Joachim Gerhard

i watched Mishima San making a cartridge.
he uses a special Stax headphone with very thin foil and i think a self made equalizer. he has a kenwood direct drive with exchangable head shell . he listens a lot to choir music
and tries to deceifer how many voices he can here. then he adjusts the suspension and also puts tiny dots of laquer here and there. it´s amasing the whole space is not bigger the 2qMeters.

Thankfully you know the right Mishima. Not the other.

[Joachim Gerhard]

to salas i found the guy that measured cables and found that reflexions matter in the audio range his name is Cyryl Bateman i will add two pdf´s with his research on capacitors unfortunately i could not find the literature about the cables yet
anyway good night i go to sleep

sorry salas they are too big but you can find the work of bateman yourself on the web

[Salas]

OK, will look. Cheers & goodnight. Too much electronics talk today, don't dream of wires.

[Iain McNeill]

Cyril Bateman published regularly in Electronics World (formerly Wireless World) on both speaker cable and capacitor performance.

Many citations but the ones that come to hand:

Measuring Speaker Cables, Electronics World, Jan 1997, p52-56
Speaker Cables, Electronics World, Dec 1996, p925-928
Understanding Capacitors (one of several parts) Electronics World, Aug 1998, p 640-644

from Cyrils references come many more texts.

[Joachim Gerhard]

thanks iain for finding the sources

[Salas]

I did the 10nF shunt on input load experiment.

Report:

1. It surely changes things.
2. Negatively so with my phono and cart. Cuts a lot of instrumental presence and detail, and breaks coherence. No less HF per se.

To do:

1. Check with 1n-3.3n silver mica and PP also. Not in my hands right now, but not far. So to follow your 5.5R and 10n relation with my 14R generator.
2. Use them 10n at the ground side of the input sockets straight to chassis, so to help clensing some gremlins possible to be coming in riding on the cable shield and listen. Best there would be COG ceramics with sort legs.

To ask:

1. Do you use shielded cart to phono cabling, or twisted one? Can it be that the 10n beneficially grounds some EMI/RFI in your case?