Don't have a desolder station or hot air gun!

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daveejhitchins
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Don't have a desolder station or hot air gun!

Post by daveejhitchins » Sun Dec 31, 2017 12:59 pm

Try this: Halogen

May get you out of a hole . . . Let us know how you get on 8)

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Re: Don't have a desolder station or hot air gun!

Post by CMcDougall » Sun Dec 31, 2017 1:15 pm

:shock: goes and gets 12v car battery out..... :lol:
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1024MAK
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Re: Don't have a desolder station or hot air gun!

Post by 1024MAK » Sun Dec 31, 2017 2:09 pm

Ahh, someone else watching Kasyan TV videos :mrgreen:

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Re: Don't have a desolder station or hot air gun!

Post by roland » Sun Dec 31, 2017 2:25 pm

It looks quite easy in this film - even for people who have a desolder station and hot air gun. Did anyone here try this at home? (My wife is out of town with the car otherwise I'd try it immediately :mrgreen: )
256K + 6502 Inside
MAN WOMAN :shock:

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Re: Don't have a desolder station or hot air gun!

Post by duikkie » Mon Jan 01, 2018 1:33 pm

is it the heat from the lamp or the light (wavelength) ?

if heat what i think then a hot air gun is beter .

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Re: Don't have a desolder station or hot air gun!

Post by daveejhitchins » Mon Jan 01, 2018 2:01 pm

duikkie wrote:is it the heat from the lamp or the light (wavelength) ?

if heat what i think then a hot air gun is beter .
UV heat - see the video . . . And, if you haven't a hot air gun to hand?

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Re: Don't have a desolder station or hot air gun!

Post by duikkie » Tue Jan 02, 2018 7:03 am

heat is heat !!! so it is not the uv wavelength that melts the solder , but the production of heat by the uv light.

i think any other bolt will do then 100 w ?
daveejhitchins wrote:
duikkie wrote:is it the heat from the lamp or the light (wavelength) ?

if heat what i think then a hot air gun is beter .
UV heat - see the video . . . And, if you haven't a hot air gun to hand?

Dave H :D

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Re: Don't have a desolder station or hot air gun!

Post by BigEd » Tue Jan 02, 2018 7:52 am

I think the car headlight halogen has two advantages over any ordinary 100w bulb: it's halogen, so the filament is hotter, so there's more infra red than from an ordinary filament; it has a metal reflector so you get the heat from the back of the filament too.

An ordinary domestic halogen has a dichroic reflector which allows heat out the back while sending the light out the front.

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Re: Don't have a desolder station or hot air gun!

Post by duikkie » Tue Jan 02, 2018 10:16 am

the point is it is still the heat not the light that makes de solder weak.

so because the light/heat ratio is so poor , you can desolder.

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Re: Don't have a desolder station or hot air gun!

Post by BigEd » Tue Jan 02, 2018 10:40 am

Yes, I'd agree that it's the IR, not the visible or the UV, which is most important here.

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Re: Don't have a desolder station or hot air gun!

Post by duikkie » Tue Jan 02, 2018 11:28 am

totally off subject but what is the melting point of solder ?

i am thinking about hot oil for desolder things ?

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Re: Don't have a desolder station or hot air gun!

Post by daveejhitchins » Tue Jan 02, 2018 12:03 pm

duikkie wrote:totally off subject but what is the melting point of solder ?
Google says:

Alloys commonly used for electrical soldering are 60/40 Sn-Pb, which melts at 188 °C (370 °F)

The typical reflow temperature range for Pb-Free (Sn/Ag) solder is 240-250°C with 40-80 seconds over 220°C
duikkie wrote:i am thinking about hot oil for desolder things ?
Ooooow! Messy!

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Re: Don't have a desolder station or hot air gun!

Post by 1024MAK » Tue Jan 02, 2018 12:50 pm

Although, you want the heat to be a bit higher that those values, so that the solder flows better. Also, the material that the solder is soldered to makes a little bit of a difference.

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Re: Don't have a desolder station or hot air gun!

Post by CMcDougall » Tue Jan 02, 2018 1:42 pm

^true, my hot air solder leveler at old work was set at 250-260 (ran like water & through a pump) so could dip whole boards (1/2m 2) if went below 250 it would 'not be shinny' & holes not at correct size

Also gold melts at 1064oC but never used that much apart from making mobile phones, & fingers for better connection's on 'add ons'
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Re: Don't have a desolder station or hot air gun!

Post by crj » Tue Jan 02, 2018 5:55 pm

I got my electric hot air gun on eBay for about twenty quid. I only use it for heat-shrink sleeving, but I imagine it might work for desoldering, too.

By the time you've messed around with a way to hold the bulb without getting fingerprint grease on it or burning your fingers, plus a way to power it, I'm not sure the halogen bulb trick is much cheaper?

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Re: Don't have a desolder station or hot air gun!

Post by 1024MAK » Tue Jan 02, 2018 7:35 pm

An electric paint stripper hot air "gun" works well if an appropriate nozzle is used. At least for desoldering. Both SMD chips and through hole chips.

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Re: Don't have a desolder station or hot air gun!

Post by jonb » Wed Jan 03, 2018 8:27 am

I found a hot air gun (paint stripper) could remove a bank of DRAM from a PET motherboard, but it nearly ruined the board, even with the narrow nozzle. That's when I bought a Duratool desoldering station.

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Re: Don't have a desolder station or hot air gun!

Post by duikkie » Wed Jan 03, 2018 12:05 pm

A narrow nozzle is to hot mostly i use the big one or gun futher away

jonb wrote:I found a hot air gun (paint stripper) could remove a bank of DRAM from a PET motherboard, but it nearly ruined the board, even with the narrow nozzle. That's when I bought a Duratool desoldering station.

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