Re: HP-25 Calculators Message #3 Posted by Randy on 4 Feb 2007, 5:18 p.m., in response to message #2 by Walter B
Quote: place a big ball of solder on each contact
You're right, that's not very elegant - and IMO, downright ugly. You'll also find it doesn't work - solder will not stick to the oxidized areas nor will it adhere to the chrome plate, should the rivet have any left. Even if you could get the solder to stick, need I mention it makes a very poor contact? Can you say "Fried Woodstock"? Do you charge your batteries in the unit? You'd better not with solder balls for contacts.
The only way I've repaired really, really trashed contacts is to remove all the solder, drill them out and replace them with a small piece of brass U channel cut down to an L shape. 1/8" works fine, it will be almost exactly the same length extending past the PC board.
I've never been able to find the same style rivet. Perhaps Keystone or some other electronic hardware manufacturer might have something but it is such a rare need, I just go with the brass.
|