Soft start and DC protection for Aleph J

3GGG · 9th May 2011, 12:28 AM

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

Bksabath · 9th May 2011, 02:43 PM

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.

h_a · 9th May 2011, 02:46 PM

Couple of thermistors do great as soft start

Hannes

3GGG · 9th May 2011, 10:13 PM

Thanks, like this?

nigelwright7557 · 9th May 2011, 10:22 PM

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.

3GGG · 10th May 2011, 08:37 AM

Zen Mod · 10th May 2011, 11:16 AM

oh boy

CL-60 is drawn on every Papaschematic

3GGG · 10th May 2011, 11:27 AM

Quote:

Originally Posted by Zen Mod

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.

jacco vermeulen · 10th May 2011, 11:36 AM

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 ?

basrad · 10th May 2011, 11:39 AM

Quote:

Originally Posted by 3GGG

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..

9th May 2011, 12:28 AM	#1
3GGG diyAudio Member Join Date: Mar 2010	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

9th May 2011, 02:46 PM	#3
h_a diyAudio Member Join Date: Sep 2006 Location: Graz, Austria	Couple of thermistors do great as soft start Hannes __________________ fresh matched IRFP240/IRFP9240 fets \|\| AlephJ/JX-kits F5 transistor kits \|\| Burning Amp BA-1/2 transistor kits

9th May 2011, 10:22 PM	#5
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	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. __________________ http://www.murtonpikesystems.co.uk PCBCAD50 pcb design software.

10th May 2011, 11:16 AM	#7
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	oh boy CL-60 is drawn on every Papaschematic __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

10th May 2011, 11:36 AM	#9
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, Rotterdam or Curaçao	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 ? __________________ Not so much,.......if it says "ZM" in the corner.


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9th May 2011, 02:43 PM	#2
Bksabath diyAudio Member Join Date: Dec 2007	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.

10th May 2011, 08:37 AM	#6
3GGG diyAudio Member Join Date: Mar 2010	Would this thermistors be suitable, it is of CL-60 type. GE \| Passives \| Resistors \| Thermistor \| \|CL-60

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