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In Reply to: RE: Replacement for screw type speaker terminals? posted by triamp on April 10, 2016 at 02:01:38
Check around the Dynaco suppliers for a close replacement. Also you might be able to find a barrier strip that would be an exact fit but you need to search. If not your idea about making a custom plate that would be an exact fit is not hard to do. I have used black plexiglass to make replacements for the screw terminal with 5 way binding posts. I used the old terminal to trace out the dimensions. The only thing with that is if you use thin 1/8" plexiglass it can crack when mounting if too much pressure is used on the chassis screws. Besides that the black plexiglass looks really nice. regards, Dak
Edits: 04/10/16 04/10/16Follow Ups:
There are new replacements - but they won't be easy to find. But there may be old stock on Amazon or eBay. Barrier blocks can be used if the screw spacing is the same. Of course you can make your own with a strip of G-10 fiberglass. I have a collection of salvaged ones and would likely have a replacement if I came across something like this.
This is what I had in mind. Made a proper binding post block out of Delrin.
While I was at it, I added a phono (turntable) ground post (green) which is lacking on this amp.
Another shot
hi, the delrin is not really necessary since the binding posts are insulated. You can use a strip of heavy gauge Aluminum which is easy to work. As you can tell by your photo getting the holes perfectly aligned so it looks more professional is hard to. You need to measure your drill marks precisely and drill the holes exactly. Of course if you are a wiz with a drill press and you have it set up with jigs it will be 2 shakes to precisely drill holes. cheers, Dak
I agree about using aluminum. Delrin is too soft, and most all plastics, especially soft types like delrin or teflon will 'cold flow' under pressure, which will cause the posts to loosen over time. When we use plastics like this at work, we need to use Belleville spring washers to keep tension. Over time, they too will loosen, so not a long term solution.
There is a very simple trick to that. Get some prepunched perfboard (circuit board) with .1 inch spacing, cut it down to the same size as the item that you are going to drill. Use a sharpie to mark the holes you want to drill, for spacing etc. Securely tape the perfboard to what you are going to drill using clear packing tape, then drill away. The holes in the perfboard will act like a guide for your drill. You may want to start with a smaller drill and work your way up depending on how large a hole you are drilling.
Cal
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