Building is always a possibility... back in the day, that is how all of these things got made.
However, I have to wonder what went wrong with the original that can't be repaired easily? Or at the very least, for $1000? Back when I was a kid, I worked for a company as a silver plater, and I replated modified BNC connectors, and switch parts... it is really quite easy, and doesn't require all that much equipment or supplies.... compared to $1000. I'm sure I could fix it for half that price ;-) -Chuck Harris OBTW, if the OP thinks his 720 is a lost cause, and is beyond economical repair, I would gladly pay him to ship it to me. I operate under a different standard of what can, and cannot be repaired than most. Tony wrote:
You could consider making your own - it's a switch, not rocket science. Layout a radial contact pattern and get some PCB's made up at a cheap PCB facility for $10 or so. Get them gold plated - possibly $20 or so? Ideally the gold would be alloyed to make it harder and more durable and 2 or 3 um thick. Make the wiping contacts from gold plated copper strip and fashion some sort of spring to apply an appropriate contact force. Use several if necessary to reduce the contact resistance sufficiently. Solder to the inner most part of the radial contacts to minimise thermal EMFs (by keeping all solder joints as close as possible for best thermal equilibrium).
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