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| John Rudd:
I'm interested in the spot welder if you can give some detail please....website link etc... |
| Will_D:
--- Quote from: John Rudd on December 16, 2014, 02:58:32 PM ---I'm interested in the spot welder if you can give some detail please....website link etc... --- End quote --- Hi John, There are a lot of you tube vids and googlformation. Here is at least an English one (given the accent!) https://www.youtube.com/watch?v=RnjF5Hj2Udg Basically remove the secondary and add two turns of the biggest wire you can fit. Mine is 85mm^2 gives 2 volts and more than 800 Amps. For the prototype tips just used some M8 * 0.8mm Mig welder tips. These are as cheap as chips even in Dubland ( €1-20 each) easier than turning down copper bar. I turned them down to about 3mm dia at the ends. Can only apply force with a pair of pliers (Need to build the arms etc) but as "proof of concept" it works A small spot welder for under a fiver :clap: BTW: The 85square was found in ICL's skip in the mid 70's (BIG mainframe computer earth straps) Should really do a :proj: thread |
| John Rudd:
--- Quote from: Will_D on December 16, 2014, 04:11:14 PM --- --- Quote from: John Rudd on December 16, 2014, 02:58:32 PM ---I'm interested in the spot welder if you can give some detail please....website link etc... --- End quote --- Hi John, Basically remove the secondary and add two turns of the biggest wire you can fit. Mine is 85mm^2 gives 2 volts and more than 800 Amps. For the prototype tips just used some M8 * 0.8mm Mig welder tips. A small spot welder for under a fiver Should really do a :proj: thread --- End quote --- Thanks for the info... :thumbup: Yup you should do a thread on this..... |
| John Swift:
Hi Will I started in the late 60's building projects in Practical Wireless the PW valve radios powered by a B 136 90V /1.5V battery worked don't know about any one else who received a Philips EE kit for Christmas but I had problems with germanium transistor radio circuits in the Philips EE kit until I replaced the AF116 supplied with an older OC44 :doh: by 1980 Practical television had published 3 or 4 colour TV projects Christmas 1981 I built the Forgestone 26" colour TV (and yes It worked first time :D ) Hi John this may give you some ideas :- http://makezine.com/2013/11/18/building-a-spot-welder-from-a-transformer/ a few days age I was looking for a DIY transformer kit for a mains power supply to replace the 90V and 1.5V batteries for a radio via a page for the maplin millennium valve amplifier I found Danbury electronics make 50 VA & 100VA DIY transformer kits :- http://livinginthepast-audioweb.co.uk/index.php?p=xfrmrvt227 http://livinginthepast-audioweb.co.uk/index.php?p=xfrmrvt228 the Wire Size Guide could be usefull John |
| awemawson:
"I started in the late 60's building projects in Practical Wireless " Oh Gawd now I feel really old! My first project was a crystal set built on the kitchen table using a copper iron heated on the gas stove. 1959 I think :bugeye: |
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