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Old 14th March 2008, 08:15 PM   #401
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Quote:
Originally posted by Zen Mod
[B]


ask sp300b , even if he'll probably change his nick these dayzzzzz in spbabelfishj
He, he, he - You're terrible right Zen - I have to change nick. babel really has deserved it. And once Pumpkin completed then again change to sppumpkin
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Old 14th March 2008, 08:21 PM   #402
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Old 26th March 2008, 01:32 AM   #403
Zen Mod is offline Zen Mod  Serbia
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Default regarding socks and sockets ;)

AR2 sent me few files these days .....

little Pumpie & Shunty test
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Old 26th March 2008, 06:39 AM   #404
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Default Re: regarding socks and sockets ;)

Quote:
Originally posted by Zen Mod
AR2 sent me few files these days .....

little Pumpie & Shunty test

I have finally finished Shuntys and I was very pleased with improvement it made over my previous power supply. What is the most apparent is how low is the noise floor. On the measurement it shows aprox. -93dB! It is rare to see that level with analogue equipment. This is the measurement normally reserved for the digital stuff. Shunty is very complex power supply but it is well justified based on the results. to the master.


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Old 26th March 2008, 06:58 AM   #405
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Yes, the Shunty is a real masterpiece The Shunty does make a great difference.

 
Old 26th March 2008, 10:48 PM   #406
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Default Re: Re: regarding socks and sockets ;)

Quote:
Originally posted by AR2



I have finally finished Shuntys and I was very pleased with improvement it made over my previous power supply. What is the most apparent is how low is the noise floor. On the measurement it shows aprox. -93dB! It is rare to see that level with analogue equipment. This is the measurement normally reserved for the digital stuff. Shunty is very complex power supply but it is well justified based on the results. to the master.



hehe

Shunty is probably less complex than TL072 , but I can bet that I can make it singbetter than 072

anyway - let us know your impression - what's difference in sound between shared (between channels) generic PS and this one ..... "complex"



btw - as I said before - Masao Noro's shunt reg is example of elegance ; Shunty is .......... Shunty .
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Old 27th March 2008, 02:57 AM   #407
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Hi ZM,

I powered up the shunty without the fuses but still blew out the R21 & R22 on both channels. Are you sure they can be rated mere .25W as stated in the cook book. I should have checked it earlier at .25W the max current they can take is only about 200 ma. Actually I used the digikey id PPC4.7BCT-ND - RES 4.7 OHM .50W 5% MF FUSIBLE.

I also have another problem the secondary voltage is measuring around 60V on my cheap DMM. This reading I am not willing to believe yet, because the low batt indicator is also on on the DMM, so tomorrow I will get new batteries and measure again.

Anyway, should I try shorting out R21 & 22 for now till I order replacements and go ahead?

Regards,
Dinesh
 
Old 27th March 2008, 06:33 AM   #408
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Default Re: Re: Re: regarding socks and sockets ;)

[QUOTE]Originally posted by Zen Mod
[B]
anyway - let us know your impression - what's difference in sound between shared (between channels) generic PS and this one ..... "complex"

Please do not let me describe the sound. It sounds rally good.
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Old 27th March 2008, 01:05 PM   #409
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Quote:
Originally posted by Magura
I think we better leave this challenge for the designer
Magura,

My suspicion is on very high secondary voltage. The DMM needs new batteries and the reading cannot be trusted, which I will fix this evening. The high voltage probably destroyed the electrolytic caps (C2, C15, C16) which resulted in high currents through the resistors which blew it. Although there was no smoke, I think, I might as well get ready to order more caps.
Dinesh
 
Old 27th March 2008, 01:12 PM   #410
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Quote:
Originally posted by dviswa


Magura,

My suspicion is on very high secondary voltage. The DMM needs new batteries and the reading cannot be trusted, which I will fix this evening. The high voltage probably destroyed the electrolytic caps (C2, C15, C16) which resulted in high currents through the resistors which blew it. Although there was no smoke, I think, I might as well get ready to order more caps.
Dinesh
Hi Dinesh.
Did you by accident connect the secondaries, wrong? It has happened before. Check the secondaries with your DMM (AC) to see if they are connected as they should be. It sounds like you could have two "hots" connected to one side of the psu.

 

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