Hi,
Having been asked by the owner to convert the speaker terminals to binding posts on a 717 I am restoring for him, I thought that there must be a way of doing this without needing to drill holes etc in the rear panel, and that would be completely reversible in so desired, and would also be applicable for the 317, 417, and 517.
Here is the end result..... well not really the end result, I have just prototyped this and this is the result.
Initial design was completed, and it was time to get into some metalworking. 1.6mm (16G) aluminium was chosen for the main plates, and 0.8mm steel for the rear locking plates. Two plates approx 76mm long an 26mm wide were cut out, as where two small locking plates
Two copies of the drawings for the main plates were printed out, then cut our and taped to the plates. Hole centres were then punched, and a hand hole punch used to make the mounting holes and binding post holes in the two plates
The plates ready for painting
and painted
The plate mounted to the rear of the 717. I am using black M3 screws, and have mounted the plates with M3 nuts for trialling the fit. M3 screws, or black 6g self tappers could be used, I am going to tray a few different combinations to see what gives the best result The plate is designed so that the fastening screws locate the plate in relation to the cutout in the 717 rear panel, and once all screws are fitted, the plate is locked in place.
What it looks like with some binding posts installed (these are not the final ones that will be fitted, I am waiting delivery of these, should be in the next day or two and I can post up final pics)
and from the rear (as per notes above, this is not the final rear arrangement)
Once this is fine tuned, I am going to get some plates and rear locking plates professionally made up from 1.0 or 1.2mm Steel sheet and powdercoated satin black. I have a few units in my collection that I will be doing this mod to, along with a couple of other 717's that I am restoring for friends, this will be a lot easier than making them up by hand.
I hope this shows another option for doing the binding post upgrade.
Cheers
John
Having been asked by the owner to convert the speaker terminals to binding posts on a 717 I am restoring for him, I thought that there must be a way of doing this without needing to drill holes etc in the rear panel, and that would be completely reversible in so desired, and would also be applicable for the 317, 417, and 517.
Here is the end result..... well not really the end result, I have just prototyped this and this is the result.
Initial design was completed, and it was time to get into some metalworking. 1.6mm (16G) aluminium was chosen for the main plates, and 0.8mm steel for the rear locking plates. Two plates approx 76mm long an 26mm wide were cut out, as where two small locking plates
Two copies of the drawings for the main plates were printed out, then cut our and taped to the plates. Hole centres were then punched, and a hand hole punch used to make the mounting holes and binding post holes in the two plates
The plates ready for painting
and painted
The plate mounted to the rear of the 717. I am using black M3 screws, and have mounted the plates with M3 nuts for trialling the fit. M3 screws, or black 6g self tappers could be used, I am going to tray a few different combinations to see what gives the best result The plate is designed so that the fastening screws locate the plate in relation to the cutout in the 717 rear panel, and once all screws are fitted, the plate is locked in place.
What it looks like with some binding posts installed (these are not the final ones that will be fitted, I am waiting delivery of these, should be in the next day or two and I can post up final pics)
and from the rear (as per notes above, this is not the final rear arrangement)
Once this is fine tuned, I am going to get some plates and rear locking plates professionally made up from 1.0 or 1.2mm Steel sheet and powdercoated satin black. I have a few units in my collection that I will be doing this mod to, along with a couple of other 717's that I am restoring for friends, this will be a lot easier than making them up by hand.
I hope this shows another option for doing the binding post upgrade.
Cheers
John
