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Old 9th May 2011, 12:28 AM   #1
3GGG is offline 3GGG  Australia
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Default Soft start and DC protection for Aleph J

Does anyone know of a currently available soft start and dc protection PCB. There are hundreds of threads and many seperate available pcb's/kits on eBay but I would rather a single pcb, from a DIYA member if possible. If not I may mke a few up.

Cheers
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Old 9th May 2011, 02:43 PM   #2
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Hi maybe the one I made is not realy elegant but work fine.
I am using a transistor flip flop to start up and then 555 to swicth on a relay
relay closed by pass thermistor.

DC protection and speaker disconect with NTE 7100 works prety well
saved my Polks a cople of times while I was messing with bias and AC Loss speaker disconect
this avoids tump at start up and power down.

I got no drawings made at present but should be able to post tonight.
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Old 9th May 2011, 02:46 PM   #3
h_a is offline h_a  Europe
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Couple of thermistors do great as soft start

Hannes
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Old 9th May 2011, 10:13 PM   #4
3GGG is offline 3GGG  Australia
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Thanks, like this?
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Old 9th May 2011, 10:22 PM   #5
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I use a PIC micro to look after dc detect and power up delay.
If it see DC for 500mS it shuts off the relay.
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Old 10th May 2011, 08:37 AM   #6
3GGG is offline 3GGG  Australia
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Would this thermistors be suitable, it is of CL-60 type.

GE | Passives | Resistors | Thermistor | |CL-60
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Old 10th May 2011, 11:16 AM   #7
Zen Mod is offline Zen Mod  Serbia
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oh boy

CL-60 is drawn on every Papaschematic
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Old 10th May 2011, 11:27 AM   #8
3GGG is offline 3GGG  Australia
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Originally Posted by Zen Mod View Post
oh boy

CL-60 is drawn on every Papaschematic

Sorry for Noob Q Zen, I am unsure if all CL-60's are of similar/suitable spec.
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Old 10th May 2011, 11:36 AM   #9
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The General Electric co. is the only one who makes the CL60, for decades.
CL60 is CL60.
You can use other thermistor types, by other manufacturers, then they have a different name.
Save ?
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Old 10th May 2011, 11:39 AM   #10
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Quote:
Originally Posted by 3GGG View Post
Does anyone know of a currently available soft start and dc protection PCB. There are hundreds of threads and many seperate available pcb's/kits on eBay but I would rather a single pcb, from a DIYA member if possible. If not I may mke a few up.

Cheers
go to amps lab u can find there soft start and dc protection.. I already made those circuits and its fine..
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