Circuit Breakers

Puffin · 25th May 2008, 01:12 PM

I was wondering if it would be possible to fit some protection to my chip amps.

I was looking at these. If they are suitable, where would you wire them in ? Between Live and tranny ?

http://www.maplin.co.uk/Search.aspx?...uit%20Breakers

http://www.maplin.co.uk/Media/product_pdfs/ak09.PDF

I also have some speaker protection thingys that use a relay, zener diodes and some caps. The only way (when testing) I could get the relay to trip was to apply DC current from the bridge rectifier. Presumably they are to stop DC. Is it worth using these ?

Puffin · 26th May 2008, 01:36 PM

Quote:

Originally posted by Puffin
I was wondering if it would be possible to fit some protection to my chip amps.

I was looking at these. If they are suitable, where would you wire them in ? Between Live and tranny ?

http://www.maplin.co.uk/Search.aspx?...uit%20Breakers

http://www.maplin.co.uk/Media/product_pdfs/ak09.PDF

I also have some speaker protection thingys that use a relay, zener diodes and some caps. The only way (when testing) I could get the relay to trip was to apply DC current from the bridge rectifier. Presumably they are to stop DC. Is it worth using these ?

Anyone ?

Nuuk · 26th May 2008, 03:09 PM

Puffin, some say that a circuit breaker is better than a fuse and some say not.

I originally used those circuit breakers that also act as a mains switch figuring less connections make for a better sound. I now use fuses and can't honestly say that I can tell the difference between one of the other.

Speaker protection is a personal choice. Slight degradation of sound quality against peace of mind. If you drive speakers directly, ie not through a passive crossover, it could be considered more of a good idea.

Puffin · 26th May 2008, 04:01 PM

Nuuk. Thanks for that. I tried wiring the Circuit Breaker into the live ac (240v) feed. It didn't seem to do anything. I am not sure what I was expecting it to do to be honest. Where do you think is the best place to wire them in ?

Nuuk · 26th May 2008, 04:07 PM

They go in place of a mains fuse ie before the mains switch.

Nothing will happen until your amp draws to much current and causes the circuit breaker to trip. In other words, no news is good news!

Puffin · 26th May 2008, 04:27 PM

Yea, thought so, that's where I had them. Thanks

mikje · 31st May 2008, 04:15 PM

Puffin,
I used this one. I wired it in series with the incoming AC; between the mains plug and the transformer.

http://www.partsexpress.com/pe/showd...number=074-022

25th May 2008, 01:12 PM	#1
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Circuit Breakers I was wondering if it would be possible to fit some protection to my chip amps. I was looking at these. If they are suitable, where would you wire them in ? Between Live and tranny ? http://www.maplin.co.uk/Search.aspx?...uit%20Breakers http://www.maplin.co.uk/Media/product_pdfs/ak09.PDF I also have some speaker protection thingys that use a relay, zener diodes and some caps. The only way (when testing) I could get the relay to trip was to apply DC current from the bridge rectifier. Presumably they are to stop DC. Is it worth using these ?

26th May 2008, 03:09 PM	#3
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	Puffin, some say that a circuit breaker is better than a fuse and some say not. I originally used those circuit breakers that also act as a mains switch figuring less connections make for a better sound. I now use fuses and can't honestly say that I can tell the difference between one of the other. Speaker protection is a personal choice. Slight degradation of sound quality against peace of mind. If you drive speakers directly, ie not through a passive crossover, it could be considered more of a good idea. __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

26th May 2008, 04:07 PM	#5
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	They go in place of a mains fuse ie before the mains switch. Nothing will happen until your amp draws to much current and causes the circuit breaker to trip. In other words, no news is good news! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

31st May 2008, 04:15 PM	#7
mikje Soakin' up the Sound! diyAudio Member Join Date: Feb 2008 Location: Bismarck, ND	Puffin, I used this one. I wired it in series with the incoming AC; between the mains plug and the transformer. http://www.partsexpress.com/pe/showd...number=074-022 __________________ Marantz PM8003 amp, HRT Music Streamer II DAC, Squeezebox Touch, DIY Krystals

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26th May 2008, 04:01 PM	#4
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Nuuk. Thanks for that. I tried wiring the Circuit Breaker into the live ac (240v) feed. It didn't seem to do anything. I am not sure what I was expecting it to do to be honest. Where do you think is the best place to wire them in ?

26th May 2008, 04:27 PM	#6
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Yea, thought so, that's where I had them. Thanks

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