Aleph 2 power supply

[kop89]

Bleeder Resistor Connection

Hi,
How do I connect the bleeder resistor on the power supply caps? Do I connect one resistor between +PWR and -PWR, or do I connect 1 resistor between +PWR and GND and another one between -PWR and GND?

This is the diagram that I am trying to follow:
ALEPH 2 POWER SUPPLY

Where is the best place to put the bleeders? Right at the power supply output, or before the coil?

Is it still OK to use the 4.7uF caps at the output, regardless of different electrolytics value?

I am using sixteen 15000uF caps (8 for each plus and minus). with 2.5mH coil between 4 capacitors on each side. I am thinking about using 10K (5W or 10W) bleeder resistor.

Thanks!

 

[Zen Mod]

between each rail & gnd , so two bleeders

put them where is convenient to you , everything is chained

4u7 are bypass for last cell in cap bank

bleeders - 4K7/3W is enough

 

[kop89]

What kind of thermistor (other than CL60) I can use to connect between AC inlet ground and the chassis? I believe the purpose of this is to avoid ground loop noise.

Does it have to be N-type or P-type? Value?

Thanks!

 

[Zen Mod]

NTC

anything between 10-30R

current capacity must be greater than your mains fuse

 

[nrg2009]

Correct.
Another application is using the CL60 for inrush, check the amp rating of the cl60 and determine if that is adequate for your application.

 

[kop89]

What kind of capacitor should I use for the snubber? Would any type of polyester or ceramic or film capacitor at 4.7uF do the job?

Thanks!

 

[Zen Mod]

snubber , where ?

 

[AudioSan]

guess you are thinking of the bypass caps?
i use polyprop or film caps.

 

[kop89]

Yes, it is for the bypass capacitor at the end of the power supply electrolytics bank.
My power supply consists of 16x15000 uF (120000 uF per plus and minus rail). I have no clue what value it should be, I am using 4.7uF because it is what this guy is using:

My Pass Labs Aleph 2 DIY Project

The only type of capacitor I have on hand at this value is tantalum dipped. Would it be OK to use this?

Thank you for all your help!

 

[kop89]

The only type of capacitor I have on hand at this value is tantalum dipped. Would it be OK to use this?

Oops - it is rated at only 35V, not going to work. 😱

 

[AudioSan]

4.7uF is fine🙂 apex jr have some 4.7uF polyprop caps. $1. they are rated 400V.
but they are big. are you using crew terminal caps?