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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 5th November 2009, 08:45 AM   #2621
Salas is offline Salas  Greece
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Simplistic NJFET RIAA
FT2=FT3 both equal in this application. I have tried both, I prefer the latter due to size only. +280pF-330pF you must use.
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Old 5th November 2009, 10:18 AM   #2622
nicoch58 is offline nicoch58  Europe
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Salas
searching around the web I see people use 140 to 180r to 500r to 840r

burn in min 15h
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Old 5th November 2009, 11:06 AM   #2623
RCruz is online now RCruz  Switzerland
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Simplistic NJFET RIAA
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 ?
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Old 5th November 2009, 02:27 PM   #2624
Salas is offline Salas  Greece
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Quote:
Originally Posted by nicoch46 View Post
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.
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Old 5th November 2009, 02:29 PM   #2625
Salas is offline Salas  Greece
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Quote:
Originally Posted by RCruz View Post
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.
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Old 5th November 2009, 03:08 PM   #2626
nicoch58 is offline nicoch58  Europe
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for who have the basic 103 plus a strong heart http://www.thomas-schick.com/Denon103/Denon103final.wmv


DL-103

Last edited by nicoch58; 5th November 2009 at 03:10 PM.
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Old 5th November 2009, 04:12 PM   #2627
Salas is offline Salas  Greece
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I am not into mechanical tweaks, I would mess it up. But I will try for the electronics to be good.
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Old 5th November 2009, 04:15 PM   #2628
nicoch58 is offline nicoch58  Europe
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your R don't need the mess

as already have damper on the body

Last edited by nicoch58; 5th November 2009 at 04:18 PM.
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Old 5th November 2009, 05:39 PM   #2629
vgeorge is offline vgeorge  Greece
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Simplistic NJFET RIAA
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!
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Old 5th November 2009, 06:27 PM   #2630
RCruz is online now RCruz  Switzerland
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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.
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