Comparison of Denon DVD-2900 Mods - Page 6

clm811 · 20th October 2009, 08:52 PM

Quote:

Progressing with fitting LCaudio clock & Zapfilter so will post back with comment on completion
Richard

Richard, Can you post an update on how your DVD2900 is going(how does it sound)?

Mine is still doing a terrific job (although the disc drawer sticks closed periodically).

-Chas

cetoole · 20th October 2009, 09:54 PM

I modified a Denon 2900 a few months ago, and it is working well. Removed the stock I/V and buffer stages for both phases of the L/R channels and replaced them with a discrete common base stage, and added XLR jacks for balanced output. Fairly long wires from the current outputs, but I couldnt come up with a great way to get around that and still be able to mount the video boards.

ben62670 · 23rd October 2009, 03:18 AM

May I ask where you bought those boards? I am very interested.
Thanks
Ben

cetoole · 23rd October 2009, 05:56 AM

They are my boards, had them made by PCBCart, as I dont have the patience to etch them myself.

ben62670 · 23rd October 2009, 06:12 AM

I hear ya. I would rather pay for someone to make the boards for me. Again very nice.
Ben

SoNic_real_one · 24th October 2009, 12:59 AM

Did anyone compare the 2900 vs 2930ci? Are those similar?
Is anybody willing to share the SM?

SoNic_real_one · 01:02 PM

I did find the SM.
Now... NJM 2068 used in the I/V stage are very popular OpAmps in many consumer devices. I am planning to swap them with something else. Options are:
OPA 1612 1.1nV/sqrtHz, 27V/uS, 40MHz, low power.
OPA 1632 1.3 nV/sqrtHz, 50V/uS, 180MHz, high power (termal pad).
Any opinions?

24th October 2009, 12:53 PM	#57
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	I did find the SM. Now... NJM 2068 used in the I/V stage are very popular OpAmps in many consumer devices. I am planning to swap them with something else. Options are: OPA 1612 1.1nV/sqrtHz, 27V/uS, 40MHz, low power. OPA 1632 1.3 nV/sqrtHz, 50V/uS, 180MHz, high power (termal pad). Any opinions? Last edited by SoNic_real_one; 24th October 2009 at 01:02 PM.

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20th October 2009, 09:54 PM	#52
cetoole diyAudio Member Join Date: Mar 2005 Location: Maryland, USA	I modified a Denon 2900 a few months ago, and it is working well. Removed the stock I/V and buffer stages for both phases of the L/R channels and replaced them with a discrete common base stage, and added XLR jacks for balanced output. Fairly long wires from the current outputs, but I couldnt come up with a great way to get around that and still be able to mount the video boards.

23rd October 2009, 03:18 AM	#53
ben62670 diyAudio Member Join Date: Dec 2006	May I ask where you bought those boards? I am very interested. Thanks Ben

23rd October 2009, 05:56 AM	#54
cetoole diyAudio Member Join Date: Mar 2005 Location: Maryland, USA	They are my boards, had them made by PCBCart, as I dont have the patience to etch them myself.

23rd October 2009, 06:12 AM	#55
ben62670 diyAudio Member Join Date: Dec 2006	I hear ya. I would rather pay for someone to make the boards for me. Again very nice. Ben

24th October 2009, 12:59 AM	#56
SoNic_real_one diyAudio Member Join Date: Jan 2008 Location: Virginia	Did anyone compare the 2900 vs 2930ci? Are those similar? Is anybody willing to share the SM?

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