Desoldering a Tuning Fork Can
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From: Bob AZ on 2 Feb 2010 23:44 On Feb 2, 5:10�pm, Chris <christopher.man...(a)gmail.com> wrote: > I have a tuning fork can sealed with solder. �Similar to a sealed > crystal can. �My 200W soldering gun doesn't even seem to have enough > BTU's to melt very much of the solder on the can. �Any suggestions? > It is a rather large heat sink capacity. > > Regards, > Chris Maness Chris For things like this I have used an electric stove burner. Perhaps a hot plate with a slab of stainless steel would be suitable. The slab to assure uniform heating and heat transfer. Originally inductance heating was probably used. Bob AZ
From: William Sommerwerck on 3 Feb 2010 08:33 > I have a tuning-fork can sealed with solder. My > 200W soldering gun doesn't even seem to have > enough BTU's to melt very much of the solder. > Any suggestions? Using a jeweler's saw (or similar fine-toothed saw), cut open the can along the solder joint. -- The Lady from Philadelphia
From: Jeff Liebermann on 3 Feb 2010 10:17 On Tue, 2 Feb 2010 16:10:50 -0800 (PST), Chris <christopher.maness(a)gmail.com> wrote: >I have a tuning fork can sealed with solder. Are you sure it's soldered and not welded? If welded, then a can opener, rotary grinder, rotary cutting tool, or belt sander to attack the seam, might work. Incidentally, if there's a evacuation seal somewhere on the can, then you'll probably find a partial vacuum inside. The tuning fork characteristics will change slightly when vibrating in air as compared to a vacuum. Are you sure you wanna do this? >Similar to a sealed >crystal can. My 200W soldering gun doesn't even seem to have enough >BTU's to melt very much of the solder on the can. Any suggestions? >It is a rather large heat sink capacity. Pre-heat the whole can on a hot plate. When you get it hot enough, the solder will melt and it should just fall apart. If you don't wanna risk getting it that hot, just get it fairly warm. Apply some rosin paste flux. Then try hitting it with a plumbers soldering tip on a propane torch. If it can solder copper plumbing, it should be able to get the can hot enough. -- Jeff Liebermann jeffl(a)cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558
From: bg on 3 Feb 2010 16:31 Chris wrote in message ... >I have a tuning fork can sealed with solder. Similar to a sealed >crystal can. My 200W soldering gun doesn't even seem to have enough >BTU's to melt very much of the solder on the can. Any suggestions? >It is a rather large heat sink capacity. > >Regards, >Chris Maness 480khz ceramic resonators are availble. http://www.digikey.com/scripts/dksearch/dksus.dll?vendor=0&keywords=480+khz+ resonator You could easily put together an oscillator with this and follow it with a divide by ten chip
From: Wild_Bill on 3 Feb 2010 17:42
Some difficult-to-solder parts are soldered quickly with resistance soldering equipment. American Beauty and Pace are 2 that I'm familiar with. The soldering tips are wired to a fairly high current, very low voltage (not many turns for the secondary winding) transformer, and the duty cycle of the xfmr primary winding is regulated by a simple triac/diac circuit. The tips are put in contact with the workpiece, and current is passed thru the workpiece, creating a short circuit in the xfmr secondary circuit, quickly generating heat in the workpiece. The tip placement for most items is at opposite sides of the workpiece, heating the entire part located between the tips. The tips don't need to be tinned, they only need to make good electrical contact with the workpiece. The end cover for a cannister type object would be a fairly simple and quick task with a resistance soldering unit. -- Cheers, WB .............. "Chris" <christopher.maness(a)gmail.com> wrote in message news:f6fff602-fa46-40e5-ad75-a087cc6fb616(a)g28g2000prb.googlegroups.com... >I have a tuning fork can sealed with solder. Similar to a sealed > crystal can. My 200W soldering gun doesn't even seem to have enough > BTU's to melt very much of the solder on the can. Any suggestions? > It is a rather large heat sink capacity. > > Regards, > Chris Maness |