pucho812

using a blow torch(propane torch) to remove parts
« on: May 05, 2020, 06:43:35 PM »
saw a video earlier today where a person was using a propane hand torch to remove mic input  transformers.

While I get the idea behind it, I can't see that being the best option to do so.  I don't know what do you think?
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.


ruffrecords

Re: using a blow torch(propane torch) to remove parts
« Reply #1 on: May 05, 2020, 07:01:24 PM »
saw a video earlier today where a person was using a propane hand torch to remove mic input  transformers.

While I get the idea behind it, I can't see that being the best option to do so.  I don't know what do you think?

In the good old days we used a solder pot which is a small bath if molten solder. You dip the PCB in it, all the joints melt and you pull the part out. Far too hazardous for today's namby pamby manufacturers. A blow torch seem quite tame in comparison. The secret in all cases is to keep the heating time to a minimum.

Cheers

Ian
www.customtubeconsoles.com
https://mark3vtm.blogspot.co.uk/
www.eztubemixer.blogspot.co.uk


'The only people not making mistakes are the people doing nothing'

Gold

Re: using a blow torch(propane torch) to remove parts
« Reply #2 on: May 05, 2020, 08:03:49 PM »
I keep one of those crack pipe butane torches around. I mostly use it to heat banana binding posts or turrets. Things that would need a large surface area soldering iron tip. I have a giant American Beauty iron but it takes a while to heat up. If I'm doing a bunch I like the iron better. For a one off the torch is faster.
I haven't tried the torch on PCB's.
« Last Edit: May 05, 2020, 09:49:15 PM by Gold »

Re: using a blow torch(propane torch) to remove parts
« Reply #3 on: May 05, 2020, 08:35:03 PM »
Flame is not appropriate for pcb work , definately not indoors ,
noxious gases,
100W solder gun or big Weller mains iron , flood the pads with extra solder ,and walk it out a little step at a time ,heat and repeat little by little you'll get there .
Heavy snips or hack saw can also make the job a lot easier .

JohnRoberts

Re: using a blow torch(propane torch) to remove parts
« Reply #4 on: May 05, 2020, 09:37:21 PM »
saw a video earlier today where a person was using a propane hand torch to remove mic input  transformers.

While I get the idea behind it, I can't see that being the best option to do so.  I don't know what do you think?
hot air station...

A propane torch is too hot, and dirty

JR
Don't only half-ass tune your drums. Visit https://circularscience.com to hear what properly "cleared" drums sound like.

Ricardus

Re: using a blow torch(propane torch) to remove parts
« Reply #5 on: May 06, 2020, 01:43:13 AM »
I saw the same video earlier. Still don't know if the guy was serious.
Audio mastering for hire..

pucho812

Re: using a blow torch(propane torch) to remove parts
« Reply #6 on: May 06, 2020, 04:37:20 AM »
hot air station...

A propane torch is too hot, and dirty

JR

yes or a desolder  gun.  I just assume the torch damages the transformers he was gutting.
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Ricardus

Re: using a blow torch(propane torch) to remove parts
« Reply #7 on: May 06, 2020, 03:06:59 PM »
Does anyone have the link to that video?
Audio mastering for hire..

PRR

Re: using a blow torch(propane torch) to remove parts
« Reply #8 on: May 06, 2020, 07:23:56 PM »
Oh, this was a thing. ~~1969 there was HUGE boxes of surplus PCBs. The gold-finger connectors sawn off but otherwise 99+% perfect, ready for harvest. Noxious? Not compared to the gasoline we drove, or the risks of going to the jungles where those PCBs had been returned from.



fazer

Re: using a blow torch(propane torch) to remove parts
« Reply #10 on: May 07, 2020, 01:04:19 PM »
I have torn apart my old dead TVs/ electronics  and removed. Caps from PCB.   I’ve used solder gun but have thought about a torch.   I use these  in guitar pedals bread boards to see if I even want to build a final Pedal  in a box..  Most are good miniature  film and polypropylene types.  I dispose of the metal hardware and only pay for disposal of the soldered card weight rather than the not toxic metal and plastic.   Granted I’ve only done this a couple of times but will do more with all the electronic junk I’ve collected.   The small caps are modern through hole and non leaky in spec.    I guess I have more time these days.     

JohnRoberts

Re: using a blow torch(propane torch) to remove parts
« Reply #11 on: May 07, 2020, 01:07:46 PM »
I have seen cigarette lighters (even matches) used to activate shrink tubing, but open flame for desoldering seems like the wrong tool for the job. 

JR
Don't only half-ass tune your drums. Visit https://circularscience.com to hear what properly "cleared" drums sound like.

pucho812

Re: using a blow torch(propane torch) to remove parts
« Reply #12 on: May 07, 2020, 09:55:15 PM »
I have seen cigarette lighters (even matches) used to activate shrink tubing, but open flame for desoldering seems like the wrong tool for the job. 

JR

military does not allow wire stripers as they may kick a wire and cause a short. only thermal strippers.  so I have seen some of the former military stripping wires using cigarette lighters
You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is.

Re: using a blow torch(propane torch) to remove parts
« Reply #13 on: May 07, 2020, 10:12:02 PM »

fazer

Re: using a blow torch(propane torch) to remove parts
« Reply #14 on: May 08, 2020, 12:49:42 PM »
Quote
open flame for desoldering seems like the wrong tool for the job


Not to mention the fumes from burning PCB card.  Not very healthy to breath.

boji

Re: using a blow torch(propane torch) to remove parts
« Reply #15 on: May 09, 2020, 02:57:38 PM »
That's one hell of a rework station.  Logi (god of fire) approves.  ;D


 

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