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Metcal Soldering Iron

 
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Dennis Johnson



Joined: 10 Jan 2006
Posts: 89
Location: N. Calif.

PostPosted: Thu Dec 27, 2007 8:44 am    Post subject: Metcal Soldering Iron Reply with quote

I have a Metcal soldering iron I bought used on eBay and it works great. I believe it heats it by sending a high frequency current to the tip of the iron. (It may also be high voltage, but I don't know.) If I'm soldering the end of a wire is there any chance that the high frequency signal from the tip of the iron will damage an expensive piece of hardware that's attached to the other end of the wire I'm soldering?

Just curious,
Dennis Johnson
Lancair Legacy, now over 100 hours flight time
[quote][b]


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nuckolls.bob(at)cox.net
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PostPosted: Thu Dec 27, 2007 2:35 pm    Post subject: Metcal Soldering Iron Reply with quote

At 08:01 AM 12/27/2007 -0800, you wrote:

Quote:
I have a Metcal soldering iron I bought used on eBay and it works
great. I believe it heats it by sending a high frequency current to the
tip of the iron. (It may also be high voltage, but I don't know.) If
I'm soldering the end of a wire is there any chance that the high
frequency signal from the tip of the iron will damage an expensive piece
of hardware that's attached to the other end of the wire I'm soldering?

Just curious,
Dennis Johnson
Lancair Legacy, now over 100 hours flight time

No. You're correct that the power supply for the
Metcal products is a "radio frequency transmitter"
with 30-50 watts of output at about 500 KHz as
I recall. The heaters located at the tips of
the irons go into a high-impedance state at
RF frequencies at their calibrated temperatures.

Thus two very important features of top-drawer
soldering tools takes place in these products.
Temperature sensing and control right at the
tip and concentration of energy conversion to
heat right at the tip.

There is no risk to sensitive components from
what's going on inside these tools.

Bob . . .

----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------


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Dennis Johnson



Joined: 10 Jan 2006
Posts: 89
Location: N. Calif.

PostPosted: Thu Dec 27, 2007 3:11 pm    Post subject: Re: Metcal Soldering Iron Reply with quote

There is no risk to sensitive components from
what's going on inside these tools.


Hi Bob,

Thanks for the speedy reply!

Dennis Johnson

do not archive


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