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Old 16th October 2012, 09:04 PM   #511
bcmbob is offline bcmbob  United States
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I think I asked this question earlier but not sure if it was this thread.

Does the size of the tabs on an AC/Mains switch have any impact on supplied power in an application like the FE? The left item is from a computer tower I produced years ago and handled a normal (200 W) PC power supply without difficulty. I'm not sure if the same electro-mechanical principles apply - meaning a possible bottleneck - for amplifiers. On the right is a standard AC inlet with 1/4 " tabs.

I have several dozen both momentary and on/off and would like to put them to use if possible.
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Old 16th October 2012, 09:38 PM   #512
Marra is offline Marra  United Kingdom
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Thanks for the good wishes Bill hopefully I'll be playing music by the weekend.
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Old 16th October 2012, 10:29 PM   #513
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Quote:
Originally Posted by bcmbob View Post
Does the size of the tabs on an AC/Mains switch have any impact on supplied power in an application like the FE?
Most 16A IEC inlets have 4.8mm tabs so I would say anything from there is good...

Any switch from 5A should be fine (but I would say 10A it's better).
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Old 16th October 2012, 10:59 PM   #514
bcmbob is offline bcmbob  United States
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Thanks, I'll use the 4.8 as a minimum for the power amps and save the NKKs for smaller stuff.
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Old 21st October 2012, 03:36 PM   #515
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cheers!

a quick question probably to AndrewT, Dario, linuxguru or other experts here.
what would be the best option to install FE in this rather small box:

-place toroids below the main pcbs (about 1cm gap between pcb and toroid)
-place one toroid on another, same with pcbs (no problem with toroids as it was discussed here and here)

both options could be used as the ordered PS caps (Panasonic) are only 3cm height. Though 1st one is easier to implement for me, but will require longer and unequal speaker and signal cables. Second is good, but there is lees than 1mm space between top toroid and the closing lid and moreover, I'm not sure how would perform FE boards in this config?!
The question is which one would be still better?! Perhaps some aluminum shield is required if I'd go with the 1st one?
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Last edited by dtses; 21st October 2012 at 03:41 PM.
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Old 21st October 2012, 03:50 PM   #516
AndrewT is offline AndrewT  Scotland
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Either will work.

But, do be careful you don't/can't have a shorted turn across your toroids.
If your grounding for a two channel is correct, then it should not make a measurable difference.

Is the case sufficient as a heatsink?
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Old 21st October 2012, 04:40 PM   #517
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thanks, Andrew!

pics do not demonstrate how chip will be installed - it goes to 50x50x16mm solid aluminum plate that is attached to the 90x300x3mm left (right) side of the case. Hope that would be fine.
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Old 21st October 2012, 05:10 PM   #518
bcmbob is offline bcmbob  United States
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I've got a better answer, but since you didn't ask me - I'm keeping it to myself.

Crushed in Bay City,
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Old 21st October 2012, 05:32 PM   #519
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hi, Bob, pls go ahead
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Old 21st October 2012, 05:38 PM   #520
bcmbob is offline bcmbob  United States
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No, Sorry, now it will cost you a $100,000 consulting fee. Truth is, I taught Andrew everything he knows
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Last edited by bcmbob; 21st October 2012 at 05:41 PM.
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