Simplistic NJFET RIAA - Page 68

nicoch58 · 19th January 2009, 10:21 AM

HI Salas as I want put the Shunt in a cheap hammond alu box

how are your pcb size HxWxD of you single b+

thanks

found 40vac trafo

Salas · 19th January 2009, 03:16 PM

Hi,

Unfortunately I did not measure its size. Maybe you can extrapolate from this picture?

nicoch58 · 19th January 2009, 03:22 PM

fine ok

thanks

Salas · 20th January 2009, 05:28 PM

Additional inter stage coupling caps to try soon, along with the CCCP Teflons. K40-9 paper in oil 400V 0,1uF.

es44 · 20th January 2009, 07:07 PM

I'm finally finished with my first attempt

Did the 36dB version, but need a little more gain, so next one will be the 46dB. It seems i can just lift the voltage 4 volts, and change a few resistors. Should be easy. ( well, at least for some, i always find a way to mess up, hehe )

Thanks for making this possible Salas.

Salas · 20th January 2009, 09:20 PM

Hey, nice!

What kind of MM you have and you need more gain?

BTW nice compact PCBs. Are they final to post?

es44 · 20th January 2009, 09:45 PM

Actually i don't know what pick-up i'm using

There's no name on it, so i suspect it's a cheap one, that someone put there long time ago.
BTW, my TT is an Akai AP-306t.
I know i need a new cartridge, but finances are a little tight at the moment, so i have to make the best of it for now.
I'm not really satisfied with the PCB yet. I have some issues with transistors being defined wrong in the library, and some things i have to define myself. Bit of a job, me being into car-repair, and not electronics, hehe.

Best regards
Ebbe

Salas · 20th January 2009, 09:50 PM

Did you notice any better turntable replay with what you already have?

P.S. There are really cheap MM out there, considered very good. Like Audio-Technica CN5625AL.

enzedone · 21st January 2009, 06:13 AM

This what I am using at the moment.

Manufacturer: Audio Technica
Model: AT-110E
Cartridge Type: Moving Magnet
Output Voltage: 4.5 mv
Freq Response: 20Hz - 22kHz
Recommended Load Impedance: 47k ohms
L/R Separation > 25db db L/R Balance < 2db db
Stylus: Elliptical Cantilever Aluminum
Lateral Dynamic Compliance: 15 x 10-6 cm/Dyne
Static Compliance: 20 x 10-6 cm/Dyne
Cartridge Mass 7.2gm

Could this be used with your standard circuit
This is one of those really cheap ones.

Thanks

Salas · 21st January 2009, 01:53 PM

The 110 is a long going favorite indeed. But since you jumped from the extra low budget $30 CN5625AL to the $70 territory, we must also not forget to mention the Grado Black for $60.

19th January 2009, 10:21 AM	#671
nicoch58 diyAudio Member Join Date: Oct 2004	HI Salas as I want put the Shunt in a cheap hammond alu box how are your pcb size HxWxD of you single b+ thanks found 40vac trafo __________________ Sic58

19th January 2009, 03:22 PM	#673
nicoch58 diyAudio Member Join Date: Oct 2004	fine ok thanks __________________ Sic58

21st January 2009, 06:13 AM	#679
enzedone diyAudio Member Join Date: Nov 2004 Location: New Zealand	This what I am using at the moment. Manufacturer: Audio Technica Model: AT-110E Cartridge Type: Moving Magnet Output Voltage: 4.5 mv Freq Response: 20Hz - 22kHz Recommended Load Impedance: 47k ohms L/R Separation > 25db db L/R Balance < 2db db Stylus: Elliptical Cantilever Aluminum Lateral Dynamic Compliance: 15 x 10-6 cm/Dyne Static Compliance: 20 x 10-6 cm/Dyne Cartridge Mass 7.2gm Could this be used with your standard circuit This is one of those really cheap ones. Thanks __________________ I realized that a major part of my job was to figure out how to use technology control to create economic force, or leverage, such that money and business flowed in Microsoft's direction” — Alex St.John, father of DirectX.

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20th January 2009, 07:07 PM	#675
es44 diyAudio Member Join Date: Apr 2005 Location: Fredericia, DK	I'm finally finished with my first attempt Did the 36dB version, but need a little more gain, so next one will be the 46dB. It seems i can just lift the voltage 4 volts, and change a few resistors. Should be easy. ( well, at least for some, i always find a way to mess up, hehe ) Thanks for making this possible Salas.

20th January 2009, 09:20 PM	#676
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Hey, nice! What kind of MM you have and you need more gain? BTW nice compact PCBs. Are they final to post?

20th January 2009, 09:45 PM	#677
es44 diyAudio Member Join Date: Apr 2005 Location: Fredericia, DK	Actually i don't know what pick-up i'm using There's no name on it, so i suspect it's a cheap one, that someone put there long time ago. BTW, my TT is an Akai AP-306t. I know i need a new cartridge, but finances are a little tight at the moment, so i have to make the best of it for now. I'm not really satisfied with the PCB yet. I have some issues with transistors being defined wrong in the library, and some things i have to define myself. Bit of a job, me being into car-repair, and not electronics, hehe. Best regards Ebbe

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