RIAA preamplifier for turnable Ziphona MA 224 - diyAudio
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Old 29th March 2012, 07:37 AM   #1
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Lightbulb RIAA preamplifier for turnable Ziphona MA 224

Hi people!
What's the best RIAA preamplifier for turntable Ziphona MA 224?
Thank you!
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Old 29th March 2012, 07:48 AM   #2
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Does it even need a RIAA? Is the cart not ceramic?
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Old 29th March 2012, 09:29 AM   #3
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Red face Ziphona MA 224 Riaa premp?!

Quote:
Originally Posted by analog_sa View Post
Does it even need a RIAA? Is the cart not ceramic?
Hi,
Earpiece is a type of MM, at least I think so?
It should be checked in dataschet this turntable?
Let's move on,....
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Old 29th March 2012, 11:04 AM   #4
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Hi,

Quote:
Originally Posted by formula 22 View Post
What's the best RIAA preamplifier for turntable Ziphona MA 224?
Ziphona was the east german turntable maker. I used to service those many years back. There are some east german turntables worth keeping, but the MA-224 is really poor IMHO, most of them actually are. There are only a handfull of belt drive Tables that where international standard and the very last direct drive / linear tracking ones, but only the Top of the range, not the ones with plastic arms.

Check the cartridge, if it is the common east german MM pickup then use any MM Phono pre. If it is the Piezo Pickup then it needs a 1MOHm input impedance and is approximately equalised and line-level already.

The Piezo-Pickups have CS-XX (where XX is some number) written on them, the magnetic systems have MS-XX (where XX is some number) written on them.

Anything else, check the make/model of the cartridge.

EQ is determined by the LP, not cartridge or turntable.

Ciao T
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Old 29th March 2012, 01:37 PM   #5
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Wink CS 29

Quote:
Originally Posted by ThorstenL View Post
Hi,



Ziphona was the east german turntable maker. I used to service those many years back. There are some east german turntables worth keeping, but the MA-224 is really poor IMHO, most of them actually are. There are only a handfull of belt drive Tables that where international standard and the very last direct drive / linear tracking ones, but only the Top of the range, not the ones with plastic arms.

Check the cartridge, if it is the common east german MM pickup then use any MM Phono pre. If it is the Piezo Pickup then it needs a 1MOHm input impedance and is approximately equalised and line-level already.

The Piezo-Pickups have CS-XX (where XX is some number) written on them, the magnetic systems have MS-XX (where XX is some number) written on them.

Anything else, check the make/model of the cartridge.

EQ is determined by the LP, not cartridge or turntable.

Ciao T
On the speakers says:
RFT
Web nell DDR
CS 29
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Old 29th March 2012, 02:31 PM   #6
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Hi,

Quote:
Originally Posted by formula 22 View Post
On the speakers says:
RFT
Web nell DDR
CS 29
CS-29 is a ceramic cartridge, it was designed for 1MOhm input impedance and no equalisation or amplification. IIRC the output will be around 150mV or so..

This is an extremely low fidelity cartridge. The output will follow the LP Equalisation only very approximatly and have very large deviations from flat.

Back in my day we used to joke "RFT = Reicht Fünf Tage" (lasts 5 days before it breaks).

For the life of me I cannot imagine the path this record player must have taken to end up in El Salvador though.

Ciao T
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Old 29th March 2012, 03:15 PM   #7
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Question Riaa pream for CS-29?

Hi ThorstenL !
What RIAA preamplifie for CS-29 to recommend?
I made ​​the RIAA preamp by this schematic, but in the secondary area (from 1 ... 3kHz) is the large distortion?
And this gives the preamplifier gain of about Au=60dB is too high.

thank you and cheers!
Attached Images
File Type: jpg Schematic-1.jpg (48.8 KB, 131 views)

Last edited by formula 22; 29th March 2012 at 03:23 PM.
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Old 29th March 2012, 03:30 PM   #8
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Hi,

Quote:
Originally Posted by formula 22 View Post
What RIAA preamplifie for CS-29 to recommend?
No RIAA. No Preamp.

Just 1MOhm input impedance. Basically any high impedance will do. Like OPA2604, connected as buffer, 1MOhm resistor on input to ground.

But the CS-29 has very poor sound quality. Best not bother.

Ciao T
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Old 29th March 2012, 04:19 PM   #9
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Quote:
Originally Posted by ThorstenL View Post
Hi,



No RIAA. No Preamp.

Just 1MOhm input impedance. Basically any high impedance will do. Like OPA2604, connected as buffer, 1MOhm resistor on input to ground.

But the CS-29 has very poor sound quality. Best not bother.

Ciao T
Do I create such a buffer for the CS-29.
Attached Files
File Type: pdf Shema 1 (buffer).pdf (22.7 KB, 26 views)
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Old 29th March 2012, 04:36 PM   #10
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Hi,

Quote:
Originally Posted by formula 22 View Post
Do I create such a buffer for the CS-29.
Yes, but remove the capacitor C1.

If gain is not enough you add some gain for the Op-Amp, but no EQ.

Another option I remembered is given on this page:

Stereo Pickups & Phono Cartridges : 1958 - today – Stereotonabnehmer

Click the image to open in full size.

This should make the CS29 work with a normal MM Phono Stage, no idea how well, never tried it. Even in East Germany I stictly used Moving Magnet Cartridges! Piezo is very low quality.

Ciao T
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