Threshold NS10 mods

[Giaime]

Hello everybody,

be kind with me, it's my first post in the "Pass Labs" forum, I've always been a thermionic man

Anyway, I have a friend who has a Threshold NS10, and since he isn't signed up here, he asked me to post his question.

He would like to know if there are any useful mods to the circuit. I wouldn't think so, since I admire Nelson Pass circuits, and I think there isn't room for mods (since the designer may have already optimized the circuit).

He heard about a mod in the power supply, or something: he already has replaced ALL the electrolytic capacitor with Elna Cerafine, and replaced the input and output connectors.

I searched and found this:
Threshold NS10

So, does someone has any idea, or do you think the project is already perfect in itself.

Thank you very much in advance.

[apassgear]

There's another thread you may want to look at

http://www.diyaudio.com/forums/showt...071#post990071

[Zen Mod]

Originally posted by Giaime
Hello everybody...................

Giaime
let your friend do what Papa sez;
for further info (fun ,amusing ...) look in few threads about NS10;
possible improvement can be implementation of shunt reg in PS,but that demands other xformer (probably in dedicated case,with umbilical)
and few other things;
let us know what your friend decided..
btw-almost to forget,NS10 is crappy piece of history,nothing more;
I can arrange local pick-up,and I'll do proper disposal operation.....

[Giaime]

Sorry people,

I made a bad mistake.

His preamp is the SL10, not the NS10.

If a moderator is reading, could you edit the title of the thread? I cannot edit the first post any more.

Excuse me

[Zen Mod]

same answer for SL10

replacing all elcos
combined series preregs with separate local shunt regs

[Giaime]

Originally posted by Zen Mod
combined series preregs with separate local shunt regs

Hello dear friend,

could you give me more details? I can't see any regulator in the schematic you attached.

[Zen Mod]

Originally posted by Giaime


Hello dear friend,

could you give me more details? I can't see any regulator in the schematic you attached.

that's presumably origigi schematic ; in lower part you can see 7815 and 7915 regs

constructing nice shunt reg (meaning 317 and 337 as series main regs,then locally placed CCS + shunt reg for each stage) is little complex task without exact gadget in front of me
I need some data ,especially current consumption for each stage

[Giaime]

Ah, I understand.

Thank you very much: since my friend is good with the soldering iron, but not quite good in electronics, I assume he cannot properly measure consumption and set up a regulator.

Maybe I will ask to send me the preamp and I'll manage that.

Thank you all very much!

[steenoe]

Hi Giaime Thanks for posting!! I have to admit that I love Italian food!! Please let us have some nice dishes I am ready to write

Steen

[Giaime]

You're welcome Steen! Let me know if you visit Venice