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ReubGold View Drop Down
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    Posted: 27 January 2018 at 6:06pm
Mate has one of these, and often trips 32A breakers in venues, on switch on.

Heard some people plug amp in switched on, any other suggestions?

Heard there is a mod ?
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Not sure bout the mod tbh,

but it may need a 64a breaker?

also all Crest 001 pro series are known for tripping breakers on switch on

sometimes my do it in the house on a 32a ring mains
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Originally posted by ReubGold ReubGold wrote:

Mate has one of these, and often trips 32A breakers in venues, on switch on.

Heard some people plug amp in switched on, any other suggestions?

Heard there is a mod ?



Get someone to build you a mains distro which switches the amps on in sequence prob using D-Curve(fuse) breakers either way you need a soft start mechanism

Edited by djkeet - 27 January 2018 at 7:14pm
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ceharden View Drop Down
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Use a longer mains cable....
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valve head777 View Drop Down
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Points: 1846 		Post Options Post Options   Thanks (0) Thanks(0)   Quote valve head777 Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2018 at 7:49pm
A friend has one of these, did the same, took it to repair and was told one of the transformers had a fault. Is now sitting in scrap pile. Wondering if not actually faulty, and C/b's not slow enough to handle current in-rush. Might pull it out again and re-check.
Back breaker amp tho!!
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ceharden View Drop Down
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Massive transformers = massive inrush current. Worth getting the soft start circuit checked because the NTC's do wear out.
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M4trix View Drop Down
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@ReubGold,


we discuss about audio equipment not MRI machines ! LOL Wink
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Points: 4871 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dub Specialist Sound Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2018 at 9:13pm
So do you all agree then if the NTC's are starting to go faulty, this is the problem on switch on?

had orther amps in the past with hi inrush current , pain in the ars sometimes in certain places

Thanks...
Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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valve head777 View Drop Down
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In my example, I'd have thought the repairer would have checked that, but who knows. Does sound like if that component fails then in-rush current becomes too large for mains supply protection. If you see what I meanConfused
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ceharden View Drop Down
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It's not a definite but if the NTC's are starting to fail short circuit it's possible.
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Meat View Drop Down
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Points: 1513 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Meat Quote  Post ReplyReply Direct Link To This Post Posted: 27 January 2018 at 9:39pm
Yeah, like some of the comments above; 01 series really do demand an absolute buttload of current on startup. Watching what they do to a genny when you try and fire up a rack of them (something like a hillstart up a wall) is amusing to me and probably worrying to those who worry about such things.

I always wanted the 10001. Utter beast of an amp. Probably needs to have a box of extra massively bigulated breakers in a rack drawer under the amp at any given point.

Apologies for this totally useless post but I'll say it again. What an absolute monster of an amp.

edit:
I can see that the viglink thing on the forum picked up on the words "absolute monster" I don't dare click right now. Does it need some sort of privacy mode turned on?


Edited by Meat - 27 January 2018 at 10:00pm
Don't test the champignon sound
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simonp1100 View Drop Down
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Hi,

The soft start on these amplifiers are pretty weird. It is done on the secondary side of the transformer BEFORE the AC is rectified rather than the usual primary side of the transformer via two relays and two 25 Watt resistors.

Check the two soft start relays (RL1 & RL2) & that the contacts have not welded together on either one. You could also check the 25 Watt resistors (each one is in series from the bridge rectifier to the main storage capacitors) are not open circuit (R3 and R4 & should be 10 ohms at 25 Watts).
 
I had one amplifier where one 10 ohms 25 watts resistor was open circuit, and the relay contacts were welded together.

 


Edited by simonp1100 - 27 January 2018 at 10:25pm
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