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Threshold 400a power switch
Threshold 400a power switch
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Old 30th December 2007, 10:34 PM   #1
j beede is offline j beede  United States
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Default Threshold 400a power switch

After many years of relaibale service the power switch/breaker seems to have failed on my 400a. I powered it on and the breaker immediately flicked off. Now the switch is loose and exhibits no mechanical resistance to moving into the on or off position. I can see no "reset" for the switch. Is this the normal failure mode? Does anyone know of a replacement switch for this old amplifier?
...j
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Old 31st December 2007, 06:08 PM   #2
Nelson Pass is offline Nelson Pass  United States
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Threshold 400a power switch
Most of the 400A's had a breaker made by Heinemann. I
suggest you try their website for dimensions and such,
and note that there are alternate manufacturers for their
products.

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Old 31st December 2007, 06:14 PM   #3
KBK is offline KBK  Canada
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Old 31st December 2007, 10:58 PM   #4
j beede is offline j beede  United States
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Quote:
Originally posted by Nelson Pass
Most of the 400A's had a breaker made by Heinemann. I
suggest you try their website for dimensions and such,
and note that there are alternate manufacturers for their
products.

Thanks for the quick reply NP,
Yes, I pulled the switch and it is indeed a Heinemann JC1-A8-BB-A. That part number does not produce may hits via Google :| I am still searching for a datasheet for this particular switch. This makes me think that they are not ordinarily failure prone. Any DIY'ers already found a form/fit/function replacement from prior repairs?

The good news is that in spite of the switch's failure the amplifier is intact... I replaced the switch with a 10 amp fuse and it is making good music as I type this.
...j
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Old 25th March 2017, 03:41 PM   #5
R-K Rønningstad is offline R-K Rønningstad  Norway
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I purchased a new mains switch for my 400A many moons ago from Jon Soderbergh. I promised member Eric M almost as many moons ago to find out about this switch, and he reminded me yesterday, so I opened up my Threshold 400A, removed the two bolts, grabbed the switch and took some pictures of it.
I am pretty sure this switch from Digikey will work perfect in a 400A:

https://www.digikey.com/product-deta...2-V-ND/5084008

Digi-Key Part Number IEGX1-1-62F-14.0-02-V-ND

My switch is labeled Airpax IEGX1-1-62F-14.0-02-V

Please double check, but this seems correct.


/RK
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Old 25th March 2017, 03:46 PM   #6
R-K Rønningstad is offline R-K Rønningstad  Norway
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Default Threshold 400A mains circuit breaker pictures

Here is the pictures of the gircuit breaker I purchased from Jon Soderbergh many years ago.
Attached Images
File Type: jpg IMG_6149.jpg (408.5 KB, 68 views)
File Type: jpg IMG_6150.jpg (476.2 KB, 66 views)
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Old 25th March 2017, 03:47 PM   #7
Zen Mod is online now Zen Mod  Serbia
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Threshold 400a power switch
digikey 404

even part number search didn't got further
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Old 25th March 2017, 04:29 PM   #8
R-K Rønningstad is offline R-K Rønningstad  Norway
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https://www.digikey.com/product-deta...2-V-ND/5084008
Does work?
Albeit sold out.
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Old 25th March 2017, 05:10 PM   #9
Zen Mod is online now Zen Mod  Serbia
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Threshold 400a power switch
now good

even if sold out

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Old 25th March 2017, 06:36 PM   #10
Pars is offline Pars  United States
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Online Components has them in stock. Note they have a $50 min order:
https://www.onlinecomponents.com/air...tml?p=10073137
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