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Old 1st February 2012, 03:24 AM   #1011
carpenter is offline carpenter  United States
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Quote:
Originally Posted by jacco vermeulen View Post
(me chopped half an inch of my left middle finger off with a milling machine yesterday, so typing is out for a while)
Ouch!

How's your disposition?
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Old 1st February 2012, 03:27 AM   #1012
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Ouch!

How's your disposition?
Did you give the doctor the finger?
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Old 1st February 2012, 03:30 AM   #1013
jacco vermeulen is offline jacco vermeulen  Netherlands
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Well, i stopped smoking.
So, if i do this for 9 more days, i can't smoke, even if i wanted to.
Not much finger to find with a wood milling machine running at a zillion rpm.
I give all doctors the finger, and lawyers.

(I'm an asparagus, which is just as well after +40 years of handling heavy machinery)
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Old 1st February 2012, 04:59 AM   #1014
carpenter is offline carpenter  United States
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Quote:
Originally Posted by jacco vermeulen View Post
Well, i stopped smoking.
So, if i do this for 9 more days, i can't smoke, even if i wanted to.
Not much finger to find with a wood milling machine running at a zillion rpm.
I give all doctors the finger, and lawyers.

(I'm an asparagus, which is just as well after +40 years of handling heavy machinery)
Damn... I hear women like asparagus.
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Old 1st February 2012, 07:24 AM   #1015
schultzsch is offline schultzsch  Europe
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I have exchanged those with Elac Bs244
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Old 2nd February 2012, 10:34 AM   #1016
schultzsch is offline schultzsch  Europe
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Hello

I want to order 4 thermal circuit breakers,I found two models but i don't know which one to choose from them.

They are these ones :
http://www.adelaida.ro/product_info....4d7faebe271135

and

Termostat bimetalic BT-H70H - ADELAIDA - Componente electronice

The only thing differing at them is the closing type which is horizontal or vertical.I would like to mount them like in this link http://www.rstaudio.de/AlephJ/ajKuehlkoerper.jpg so which one should i choose?

One more question : for 1.6-1.7A bias per fet what fuse should I use on mains? 0.8-1A fast or slow blow would do the job?

Thank You

Last edited by schultzsch; 2nd February 2012 at 10:59 AM.
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Old 2nd February 2012, 11:16 AM   #1017
jacco vermeulen is offline jacco vermeulen  Netherlands
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Horizontal & Vertical merely refers to the orientation of the push-on terminals, whatever you find more practical or prettier.

Fast blow on mains ? Why ? (think peak currents at turn-on, transformer and capacitors)
1A times 230V = 230VA. Is that smart engineering if the transformer behind the fuse is 400VA ?

(when the end comes i know, i was just an asparagus, life goes on without me)
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Old 2nd February 2012, 11:26 AM   #1018
schultzsch is offline schultzsch  Europe
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Quote:
Originally Posted by jacco vermeulen View Post

Fast blow on mains ? Why ? (think peak currents at turn-on, transformer and capacitors)
1A times 230V = 230VA. Is that smart engineering if the transformer behind the fuse is 400VA ?
I think i need slow blow type fuse but i do not know how to calculate the rated current for the fuse

pretty ugly finger you have there

Last edited by schultzsch; 2nd February 2012 at 11:37 AM.
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Old 2nd February 2012, 11:37 AM   #1019
jacco vermeulen is offline jacco vermeulen  Netherlands
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400VA divided by 230V makes 1.75A

Other side : looking at the output stage, 4 times IRFP240 handle a total of 600W max power.
600VA divided by 230V is ~2.6A, let's make it 2.5A

Which value would you choose ?
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Old 2nd February 2012, 11:47 AM   #1020
schultzsch is offline schultzsch  Europe
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I think i will chose a fuse rated at 1.6-2A maximum, because i do not want to push the fets at their maximum power rating.Will this value be good?

I will also use in series with the mains one thermistor rated at 3A and 10R for inrush current limit.
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