Using the HYPNOTIZE as a general shunt reg PCB

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it was there up to 0.5μs (scopes max)but now i tried to measure again and it`s crystal clear.so i guess it was the measurement.

 

[Salas]

Just interference you get now and then. Can be EMI or RFI. If you will loop the GND crock to the probe's tip and move it around, or keeping it on the PSU output while its turned off, it will be showing several non DUT related weird stuff.

 

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sounds good but needs more capacitance to the bank.i have 2 x nichicon KG3300uf and bass lacks.
it`s running at 2.1A.should i go with 1x10000uf or more?any recommendations?

 

[Salas]

What you power with it?

 

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An audio interface.tc impact twin.

http://www.tcelectronic.com/impact-twin/

it`s the sound of those nichicond too.they lack bass everywhere i have used them.
i would like panasonic fm-fc but i guess i need more uf than they are available.

 

[Salas]

Use 2x10000uF snap in per rail.

 

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wow 2x10.000 ok.fortunately there is only +12v

 

[Salas]

Yes but you run 2.1A per rail. Wouldn't it be natural to use 20mF if you were powering a Class A amp at 2A?

 

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yes it is.any recommendations?panasonic,mundorf,epcos?

 

[Salas]

Check the diameters first. I would be happy with Panasonic for powering an interface console I guess. For normal cost and reliability. Because it should be hot there. Any pic of the 2.1A reg on its sink?

 

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i am thinking to use the case as a heatsink.it`s iron but it`s big.you think it will be good?
now i use two heatsinks temporary but one is very close to the capacitor.

 

[Salas]

Vague. All I can say is don't measure more than 80C on the MOSFET cases any way you mount on any surface on any day for any long.

 

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something strange is happening here.i have 17.7 ac and only 18.3dc.how is it possible?
when i reduce current i have 23volts.
is it the diodes that collapse?they are mur860.
can`t be the trasformer.it`s 6A+

 

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propably they do.i used an external bridge rectifier 35A and i have 19.8 dc.

 

[Salas]

They show 0.9V forward drop at 100C (internal) at 2A plus region. Could be 1V at lower temp. 2VDC in a bridge. At 19.8VDC there is still some regulation drop in the Tx bcs its only x1.2 from 17.7VAC. 23VDC is x1.3 which is the usually expected from practical systems with losses but well rated for Tx impedance.

 

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They show 0.9V forward drop at 100C (internal) at 2A plus region. Could be 1V at lower temp. 2VDC in a bridge. At 19.8VDC there is still some regulation drop in the Tx bcs its only x1.2 from 17.7VAC. 23VDC is x1.3 which is the usually expected from practical systems with losses but well rated for Tx impedance.

yes they still regulation drop and i wonder why.i reduced the current too at 1.5A.yet i have some mur1520(maybe with heatsinks) i want to try.

p.s.i have add 2x10.000 and now is 20.2v.

 

[Salas]

Less ESR now. Losses everywhere that creep up more with strong current. About Tx most have more loss than you may think before you push them hard. Enough raw DC for 12Vout though with this one if the mains are steady.

 

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Less ESR now. Losses everywhere that creep up more with strong current. About Tx most have more loss than you may think before you push them hard. Enough raw DC for 12Vout though with this one if the mains are steady.

i believe the answer is at the transformer losses.anyway 20v is enough i guess.
it finally sounds better than the stock smps.

 

[Salas]

Finito then, good job. Make a pic sometime.

 

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Finito then, good job. Make a pic sometime.

i will upload a pic when i put it in a box.for now there is not much to see.