Simplistic NJFET RIAA - Page 263

Salas · 5th November 2009, 09:45 AM

FT2=FT3 both equal in this application. I have tried both, I prefer the latter due to size only. +280pF-330pF you must use.

nicoch46 · 5th November 2009, 11:18 AM

Salas
searching around the web I see people use 140 to 180r to 500r to 840r

burn in min 15h

RCruz · 5th November 2009, 12:06 PM

I need to place a power on indicator in the psu, using a led.

I am using raw DC just after the rectifier bridge (ex: 40v) and need to know:

What is the minimum current the led needs to operate ?
Does this led current affect noise produced by the led ?

I am reading most leds need 20mA... can I use 5mA ?

Salas · 5th November 2009, 03:27 PM

Quote:

Originally Posted by nicoch46

Salas
searching around the web I see people use 140 to 180r to 500r to 840r

burn in min 15h

OK. Got it. Works from 150 up. Rest is system synergy. Back to square 1.

Salas · 5th November 2009, 03:29 PM

Quote:

Originally Posted by RCruz

I need to place a power on indicator in the psu, using a led.

I am using raw DC just after the rectifier bridge (ex: 40v) and need to know:

What is the minimum current the led needs to operate ?
Does this led current affect noise produced by the led ?

I am reading most leds need 20mA... can I use 5mA ?

Use 5mA, at 20mA they get too bright. If with blue even 5mA shines too much. No problem with noise, since you are putting it before the regs.

nicoch46 · 04:10 PM

for who have the basic 103 plus a strong heart

http://www.thomas-schick.com/Denon103/Denon103final.wmv

DL-103

Salas · 5th November 2009, 05:12 PM

I am not into mechanical tweaks, I would mess it up. But I will try for the electronics to be good.

nicoch46 · 05:18 PM

your R don't need the mess

as already have damper on the body

vgeorge · 5th November 2009, 06:39 PM

I have a basic 103 and I have put a wooden body on it.
I can tell you that it was not so hard to do it.
I haven' t listen extesivly to it, but it looks much better!

RCruz · 5th November 2009, 07:27 PM

New dl160 riaa psu recipe:

One 2r2 mills resistor before the Jensen 4 pole 15000u.

Voltage droped only a little (as expected) and now I get 39,5v on shunt Vin.

I get lower noise and better detail + spaciality.

5th November 2009, 04:08 PM	#2626
nicoch46 CiaoCiao:) diyAudio Member Join Date: Oct 2004	for who have the basic 103 plus a strong heart http://www.thomas-schick.com/Denon103/Denon103final.wmv DL-103 Last edited by nicoch46; 5th November 2009 at 04:10 PM.

5th November 2009, 05:15 PM	#2628
nicoch46 CiaoCiao:) diyAudio Member Join Date: Oct 2004	your R don't need the mess as already have damper on the body Last edited by nicoch46; 5th November 2009 at 05:18 PM.

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


<a rel='nofollow' href='http://www.diyaudio.com/openx/www/delivery/ck.php?n=aa5cb2e9&cb=489908' target='_blank'><img src='http://www.diyaudio.com/openx/www/delivery/avw.php?zoneid=3&cb=489908&n=aa5cb2e9' border='0' alt='' /></a>	We're saving for a new server - help us to serve you by Donating Today and become a friend with benefits! Ads on/off / Custom Title / 2009 Tshirt / More PMs / Bigger Images / Advanced printing

5th November 2009, 09:45 AM	#2621
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	FT2=FT3 both equal in this application. I have tried both, I prefer the latter due to size only. +280pF-330pF you must use.

5th November 2009, 11:18 AM	#2622
nicoch46 CiaoCiao:) diyAudio Member Join Date: Oct 2004	Salas searching around the web I see people use 140 to 180r to 500r to 840r burn in min 15h

5th November 2009, 12:06 PM	#2623
RCruz diyAudio Member Join Date: Sep 2006 Location: Cascais Blog Entries: 1	I need to place a power on indicator in the psu, using a led. I am using raw DC just after the rectifier bridge (ex: 40v) and need to know: What is the minimum current the led needs to operate ? Does this led current affect noise produced by the led ? I am reading most leds need 20mA... can I use 5mA ?

5th November 2009, 05:12 PM	#2627
Salas diyAudio Moderator Join Date: Oct 2002 Location: Athens-Greece	I am not into mechanical tweaks, I would mess it up. But I will try for the electronics to be good.

5th November 2009, 06:39 PM	#2629
vgeorge diyAudio Member Join Date: Mar 2004 Location: poros island	I have a basic 103 and I have put a wooden body on it. I can tell you that it was not so hard to do it. I haven' t listen extesivly to it, but it looks much better!

5th November 2009, 07:27 PM	#2630
RCruz diyAudio Member Join Date: Sep 2006 Location: Cascais Blog Entries: 1	New dl160 riaa psu recipe: One 2r2 mills resistor before the Jensen 4 pole 15000u. Voltage droped only a little (as expected) and now I get 39,5v on shunt Vin. I get lower noise and better detail + spaciality.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)