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Old 16th October 2012, 09:52 PM   #621
Salas is offline Salas  Greece
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Nice. When you will sort it out as a system drop us a note if all went to plan.
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Old 17th October 2012, 02:26 PM   #622
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I'll post pictures when it's completed. I've also added a 21 Ohm 1% 3 watt resistor to my 10 Ohm to hot rod it a little bit more. Now the Heatsinks get warm. Spot check with temp gun reads 93*F on the Mosfets.

Thanks for all your help.
Ron
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Old 17th October 2012, 05:05 PM   #623
Salas is offline Salas  Greece
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I saw those sinks are plenty big, its gonna live a long time on them at 200mA+ you took it.
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Old 27th October 2012, 02:23 PM   #624
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I have a problem, with my Mesmerize, not sure if it's a ghost, not sure what I am looking for.

Basically, when the system is powered no problem at all. I have 300mV of offset when the system is powered off. This with no connection to anything whatsoever.

The only explanation I have is that there is a capacitor trying to discharge from the output, but the funny thing is that if I shorten the output and then open it again, the 300mV come back.

I am really puzzled. It could be that I have been living with this for years.

Please let me understand.

Thanks,

Davide
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Old 27th October 2012, 03:09 PM   #625
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I've just swap meet'd a bunch of heatsinks that would suit the SALAS Shunt PSU as long as you're not running crazy amps through it.
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Old 27th October 2012, 06:39 PM   #626
Salas is offline Salas  Greece
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Quote:
Originally Posted by Nikon1975 View Post
I have a problem, with my Mesmerize, not sure if it's a ghost, not sure what I am looking for.

Basically, when the system is powered no problem at all. I have 300mV of offset when the system is powered off. This with no connection to anything whatsoever.

The only explanation I have is that there is a capacitor trying to discharge from the output, but the funny thing is that if I shorten the output and then open it again, the 300mV come back.

I am really puzzled. It could be that I have been living with this for years.

Please let me understand.

Thanks,

Davide
Maybe something with absolute ground potential? Make it be shorting to ground when off. Is it the pcb with a T arrangement on the output relay that does it already, or one older?
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Old 27th October 2012, 08:20 PM   #627
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The pcb is from tea-bag is written layout by crt, but there is no version. It's blue.

I'll make some test...no earlier than one month

Thanks,

Davide
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Old 27th October 2012, 08:25 PM   #628
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The blue one has the T-Mod.
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Old 27th October 2012, 08:32 PM   #629
Salas is offline Salas  Greece
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To clarify, when your PCB has this detail in double layer, the output is at ground when its powered off. And you can also confirm that with a multimeter.
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Old 27th October 2012, 08:37 PM   #630
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I am not sure about the pcb, but when the system is off, I measure something like 100kohm. I think you are suggesting me a solution. I can add the connections.

D.
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