a new power supply for Z#9

[gionag]

Hi guys,
do you know a good way to give a Zen#9 a choke input supply ?

i used PSUD2 for trying good values but i had a lot of error during tests.

How i have to calculate exact value for giving a 50V rail ?

thanks

 

[Nelson Pass]

By choke input do you mean an inductor in series with the AC
waveform, or CLC type filtering?

 

[gionag]

Wow, my first Nelson Pass' s reply !

i think the CLC type is better.

but i'm thinking about a mix of a choke in series with AC and a CLC filtering.

What do you think ?
How you suggest to proceed ?😀

Thanks a lot

 

[jacco vermeulen]

Must be an Italian thing.

Keep-It-Simple-S.

 

[gionag]

what do you mean ? 😀

you think that Input ckoke + CLC filtering is too much ?

at least, i use only a CLC filtering but i need an hand on calculating the right values for cap. and choke.

Thanks !

 

[jacco vermeulen]

I mean that good is good enough.

You haven't succeeded in calculating a choke supply with Duncan's punch and go toy, your second move is to make it more difficult.
Build something the normal way and learn as you go along, save a bit more complicated for the second project.
Do not take 10 steps at a time as members like Stefanoo do, it will lead nowhere but dissapointment.

I reckon most overhere regard CLC as sufficient.

 

[Magura]

I mean that good is good enough.

You haven't succeeded in calculating a choke supply with Duncan's punch and go toy, your second move is to make it more difficult.
Build something the normal way and learn as you go along, save a bit more complicated for the second project.
Do not take 10 steps at a time as members like Stefanoo do, it will lead nowhere but dissapointment.

I reckon most overhere regard CLC as sufficient.

with 96dB speakers, CLC is adequate, if you go past 100dB speakers, AFAIK the only ticket for a ZV9 to remain silent is regulated supply.....

But as Jacco just said, keep it simple.....build yourself a ZV1 as a first project, PCB's can be had from audio express, it's simple and well documented. Once you got that up and running, and understand what it's doing, to convert it to a ZV9 is a walk in the park 😉

Magura 🙂

 

[Magura]

i need an hand on calculating the right values for cap. and choke.

Thanks !

30.000uF>2mH>30.000uF


Magura 🙂

 

[steenoe]

To keep it simple, this is the easy and cheap solution for the inductor:

http://uk.farnell.com/1191495/passives/product.us0?sku=SCHAFFNER-RN152-10-02

🙂

BTW the original Zen9 circuit is sporting a "sort of" capacitance multiplier that cleans the supply rails. A CLC supply is not really necessary.

 

[Zen Mod]

To keep it simple, this is the easy and cheap solution for the inductor:

http://uk.farnell.com/1191495/passives/product.us0?sku=SCHAFFNER-RN152-10-02

🙂

BTW the original Zen9 circuit is sporting a "sort of" capacitance multiplier that cleans the supply rails. A CLC supply is not really necessary.

rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrriiiiiiiiiiiiiiiiiiiiiiiiinggggggggggggggg........

that's AC choke .



btw - Jaccovitty is grumpy today ..........

 

[gionag]

sometimes i don't fully understand what do you talking about !! 😀

anyway, it's a good or a bad think an input CHOKE ?

 

[Zen Mod]

sometimes i don't fully understand what do you talking about !! 😀

anyway, it's a good or a bad think an input CHOKE ?

sketch what you think ;

when you say - "cap input filter" that means that cap is connected after graetz , from + to gnd - AS FIRST element in filter

when you say "choke input filter", that means that choke is connected after graetz , from + to gnd , AS FIRST element in filter ;

if you still insist on series choke ( as I read somewhere up the thread , you are lookin' for trouble .

download PSU from Duncan's and read help ;

then you'll learn something , and then you can ask .......... without running in circles ;

everyone here is willing to help, but you must do your homework .

 

[gionag]

you are right... but the barrier of language is difficult to pass away.

i'm looking for a good english teacher 😀

 

[Zen Mod]

you are right... but the barrier of language is difficult to pass away.

i'm looking for a good english teacher 😀

I'm in same situation often , regarding language ;

that's why I told you that is best to make a sketch and attach it here ;

 

[Nelson Pass]

anyway, it's a good or a bad think an input CHOKE ?

The input choke, that is to say a choke in series with the AC
part of the circuit, will improve the power factor of the amplifier's
usage of the AC line by lowering the peak AC current and
extending the duration of the charge time.

At the same time, it will result in less DC voltage on the
secondary system, so it's an ideal way to drop the DC voltage
down to a lower value when you are running a constant draw
(Class A).

 

[woody]

This is kind of power supply related. Instead of using Q4 as a
cap multiplier could we simply wire a 12v zener across c3 and
return it to the drain of Q2. Wouldn't this be cascode shielding
for Q3.