DIY Solidphono RIAA circuit from TNT-audio....

jazzpeter65 · 28th March 2004, 09:19 AM

HI,

I'm looking for a good phono RIAA circuit for my MM-pickup.

Found a project at www.tnt.audio.com called "the Solidphono".

The SSM2017 is absolute, so I'm using the SSM2019 instead. Can't get it working - it's all noise and distortions at the input.

Is there a mistake in the drawing of the input connections and groundingscheme? It looks strange to me that on of the differiential inputs(-) is connected to ground...(?)

Anyone who has built this circuit? Ane comment in general?

Best,

Peter

analog_sa · 28th March 2004, 12:32 PM

Looks fine. You may wish to include small resistors (or ferites) in series with the inputs.

jazzpeter65 · 28th March 2004, 02:43 PM

Why, if I may ask?

- Peter

analog_sa · 28th March 2004, 04:29 PM

To prevent oscillation

jazzpeter65 · 28th March 2004, 04:54 PM

OK.

Is this what you mean?

analog_sa · 28th March 2004, 06:05 PM

No. Just add two 50-100ohm resistors in series with the inputs or add ferite beads on the input wires. If the SSM2019 is anything like the INA103 this will greatly defeat the inclination to oscillations.
Kuei will likely come with better siggestions.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
riaa circuit	lt cdr data	Solid State	42	26th April 2010 11:06 PM
LME49710 -- new passive RIAA Circuit	jackinnj	Solid State	7	18th July 2007 09:19 AM
YARC yet another RIAA circuit	kjunom	Analogue Source	6	3rd June 2006 12:51 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th March 2004, 12:32 PM	#2
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Looks fine. You may wish to include small resistors (or ferites) in series with the inputs.

28th March 2004, 02:43 PM	#3
jazzpeter65 diyAudio Member Join Date: Sep 2003 Location: Copenhagen	Why, if I may ask? - Peter

28th March 2004, 04:29 PM	#4
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	To prevent oscillation

28th March 2004, 06:05 PM	#6
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	No. Just add two 50-100ohm resistors in series with the inputs or add ferite beads on the input wires. If the SSM2019 is anything like the INA103 this will greatly defeat the inclination to oscillations. Kuei will likely come with better siggestions.