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Old 13th April 2014, 11:37 PM   #1
j beede is offline j beede  United States
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Default Amp is great... power switch not so much

It's been 7 years since the power switch in my Threshold 400A "exploded". This morning the switch in my Stasis 3 failed. Not fun.

The last time I lucked out and found a Panasonic replacement at HSC Surplus. Sadly that store is long gone. Anyone know of a source for a JC1-A8-BB-A? My search shows that this topic comes up now and again... but I see no evidence of anyone actually acquiring one. Ideas?
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Old 14th April 2014, 01:30 AM   #2
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Join Date: Jan 2004
Location: Silicon Valley
There's still Halted (HSC Electronic Supply) in Sunnyvale:
HSC Electronic Supply - Silicon Valley's Electronic Marketplace
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Old 16th April 2014, 04:08 PM   #3
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Location: Old Anglia
Due to age this isn't that extraordinary.
Consider retrofitting a soft start circuit.
thank you papa !!
Blaue Leuchtdioden machen blöd. (hb)
quod licet iovi, non licet bovi
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Old 16th April 2014, 07:32 PM   #4
j beede is offline j beede  United States
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Originally Posted by ticktock View Post
Due to age this isn't that extraordinary.
Consider retrofitting a soft start circuit.
Agreed, not extraordinary. The data sheet for this breaker/switch specifies MTBF as 6,000(!) operations under bias. That's an average of about one cycle every two days for an amp of this age. Unfortunately, their estimate was about spot on.

If I can find a rocker switch that fits the same cutout I will go that route. An internal 10A slow blow fuse (like most amps) in series with the switch should preserve the amp's stock appearance and improve the tactile feel of the switch over the dreaded "springy" feel of the stock unit. In twenty years of use covering three Threshold amps I have had two failed breakers and zero circuit breaking events. Knock on wood.
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