The ebay kits are good but you can build one for a less, using copper strip instead of the pcb. The most expensive part is the power supply or batteries. Consider it a partly assembled kit. You will want quick disconnect fittings for electric, and the water pumped in the coil.
Ive only done a couple of 24v test runs so far.A set of mosfets/capacitors is about 15 quid, those are the main parts. I have bought some spares for repair or to extend it if I have spare power.
If you want to read up on the details, search for "royer oscillator induction heater" and this page has some history of the idea.
I have a tecarc 160 MMA DC inverter. Would that be sufficient as a power supply? It gets limited use as it currently sits.
From my limited understanding ( must do some further reading) I need;
Power supply (DC inverter welder ?)
Heating system ( this is the bit I don't really understand, PCB, copper strip etc)
Water pump to keep it cool (is this a necessity? My use would be stuck bolts so max use would be a couple of minutes sporadically)
Some way of extending leads and making it compact at the business end to get into inaccessible places on cars.
Actual heating coil (I've loads of copper brake pipe. I assume that is ideal?)
I got a cheapish kit like you mention and have used it once on a car bolt I aways foget I have it and use the blow torch.
Mine connects to the vechie I am working on battery with crocadile clamps and ong enough leads to reach the area.
I got a cheapish kit like you mention and have used it once on a car bolt I aways foget I have it and use the blow torch.
Mine connects to the vechie I am working on battery with crocadile clamps and ong enough leads to reach the area.