My Take on Threshold NS10

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#201
apassgear said:


This NS10 circuit looks very promising for the use of the precision shunt regulator LM431. I have use these before for the output I/V and buffer on my CD player with excellent result. 😎

The beauty of this compact component (TO-92) is that can be installed right on the gain board and use 2 of these for each channel (one per rail).

I’ll come up with some resistor values and schematic for testing.🙂
Click to expand...

I don't wanna to defence "my " (sound-westhost -boiled water 😉 ) solution.......
TL431 is worth a try also,and only ears can decide..........

ya know this BS hififile blahblah-"mebbe too much feedback in my supply will spoil the delicacy of sound........"


😎

but-I always prefer version with less feedback;
name of the game is to achieve that UI characteristics of source and load are angled as near to 90degs as we can achieve....

I must say that I have that xperience primary from making tube gadgets:devilr:
 
#203
choky said:


I don't wanna to defence "my " (sound-westhost -boiled water 😉 ) solution.......
TL431 is worth a try also,and only ears can decide..........

ya know this BS hififile blahblah-"mebbe too much feedback in my supply will spoil the delicacy of sound........"


😎

but-I always prefer version with less feedback;
name of the game is to achieve that UI characteristics of source and load are angled as near to 90degs as we can achieve....

I must say that I have that xperience primary from making tube gadgets:devilr:
Click to expand...

Nice link Choky,

A Pi filter is always advisable before the reg, and if one makes it a CLC better still.

The example shown are worst case scenario.

I guess you are right, the ML431 deserves a test. Sound results will decide, but this low demand circuit seems perfect for this regs.

I did check ripple with the scope and is was flat all the way down to 1Hz but used an elaborate Pi filtering before the reg on the application I referred.

😎
 
#205
Next time do a search, button top right of your screen.
Next time, ask your question on an Aleph thread, this one is not about Aleph power amplifiers but about a Threshold preamplifier.

You need a CL60 thermistor for 115VAC, a CL70 for 230VAC.
CL60 = 10Ohms/25C, 5 Amps
 
#206
jacco vermeulen said:
Next time do a search, button top right of your screen.
Next time, ask your question on an Aleph thread, this one is not about Aleph power amplifiers but about a Threshold preamplifier.

You need a CL60 thermistor for 115VAC, a CL70 for 230VAC.
CL60 = 10Ohms/25C, 5 Amps
Click to expand...

to jflemelin:

besides quoted (I agree 100%) -welcome aboard


:clown:
 
#207
Ok, just to keep you guys from falling asleep😀 😀 I am working on a more "audiophile"-like version of the NS10. Attached is a pic of Choky's shunt reg supply. One for each channel, ofcourse😉 I used small schotky's as rectifiers then 2200uf Nichicons, 100r 2 watts, then some Black Gates. (cause I had them in my box of caps😀 ) Followed by good old BD's and 220uF FC's! What do think, will that psu do? Guess it will🙂 Mainboards will be stuffed with good parts too, you see the outputcaps on the pic🙂 22uF MKP's. (Jantzen audio) The rest is FC's and Rifa polyprops and so on😉 Will keep you posted about listening results😉 I have great hopes for this little linestage, thats no secret🙂

Steen😎
 

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#208
steenoe said:
Ok, just to keep you guys from falling asleep😀 😀 I am working on a more "audiophile"-like version of the NS10. Attached is a pic of Choky's shunt reg supply. One for each channel, ofcourse😉 I used small schotky's as rectifiers then 2200uf Nichicons, 100r 2 watts, then some Black Gates. (cause I had them in my box of caps😀 ) Followed by good old BD's and 220uF FC's! What do think, will that psu do? Guess it will🙂 Mainboards will be stuffed with good parts too, you see the outputcaps on the pic🙂 22uF MKP's. (Jantzen audio) The rest is FC's and Rifa polyprops and so on😉 Will keep you posted about listening results😉 I have great hopes for this little linestage, thats no secret🙂

Steen😎
Click to expand...


if you put 2x100 ohms(instead of 2x120),than your ripple rejection will be smaller and both BDs will be hotter;
you think to put some lil' htsnks on BDs ? :devilr:
in any case-get handy your DVM and measure current for one channel and finnaly give me that data (pleaseeeeeeeeeeeee);
after that I'll recheck values for "proposal" to make it finall solution-at least for my NS10 megaclone😎

btw-looks nice😱 will these sh**ty caps be in air-one leg on pcb,one on back side?
 
#209
if you put 2x100 ohms(instead of 120),than your ripple rejection will be smaller and both BDs will be hotter;
Click to expand...
I just used 100r's cause I had them in my inventory🙂 If 120 is a must, I have to order some?? Didnt think it would matter a lot, Choky? Yep, I have some heatsinking in mind for those BD's allright😀 I am gonna saw a PC heatsink up in suitable pieces😉
I will surely post my measurements on this one! I have "only" got a Fluke 87V so I guess you can rely on the digits?😀 Ohhh, the NS10 megaclone, is the one I am building ha-ha😀

Steen😎
 
#210
Very nice Steen! 😎

I can't wait to see your mega-clone. 😀

Just wondering about your post#157

I was not sure if there is a problem with my silkscreen or is that just a different pinout for that particular device. I just want to be sure just in case people might want an updated PCB silkscreen.

Also if anyone has any ideas for enhancements I may have a little time to get them in.

Cheers!
Russ
 
#211
will these sh**ty caps be in air-one leg on pcb,one on back side?
Click to expand...
I dont think they are that sh###y, at all🙂 The Jantzen caps won all listenings tests they did in Denmark🙂 Just so you know!! With brands like M-cap supreme and other stuff like that, Jantzen took the score😀 😀 Nonetheless, I do intend to make them "Air-suspended" somehow! I might reconsider that, though, and make a more firm attachment🙂

Steen😎
 
#212
steenoe said:
I just used 100r's cause I had them in my inventory🙂 If 120 is a must, I have to order some?? Didnt think it would matter a lot, Choky? Yep, I have some heatsinking in mind for those BD's allright😀 I am gonna saw a PC heatsink up in suitable pieces😉
I will surely post my measurements on this one! I have "only" got a Fluke 87V so I guess you can rely on the digits?😀 Ohhh, the NS10 megaclone, is the one I am building ha-ha😀

Steen😎
Click to expand...

nah-just put some 22oms /0.25W on top of each 100ohms and enjoy;
it didn't matter a lot-you're right,but you need every ounce of killing that ripple-don't you think😀

regarding Fluke-just gimme all digits before comma and I'll be good
:devilr:

mods- I sayed megaclone first!!!

😡
 

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#219
steenoe said:
I dont think they are that sh###y, at all🙂 The Jantzen caps won all listenings tests they did in Denmark🙂 Just so you know!! With brands like M-cap supreme and other stuff like that, Jantzen took the score😀 😀 Nonetheless, I do intend to make them "Air-suspended" somehow! I might reconsider that, though, and make a more firm attachment🙂

Steen😎
Click to expand...

bwah-go to
http://choky.on.neobee.net/My_BOZ.html
and look at second pic from bottom of the page-now you can see what caps are


:angel:

regarding suspension- just make both output caps tight close and put some plastic strips around both ,and then solder
 
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