Originally the tagstrip was attached to the power supply with three rivets, then the solder tags on the mating tagstrip with the wiring loom was soldered to the fixed tagstrip on the chassis. I've attached an annotated pic of how it was, and the state of the chassis as found. In the pic of the underside of the restored chassis you'll see how I've used a turret-tag strip on the inside of the chassis as it would protrude too far out had it been mounted externally. (I fixed the new strip with brass CH screws and nuts).
Although it's a better set-up than the old tagstrip arrangement, while still being close in appearance to the original, I'd intended to poke the loom wires through the turrets and solder them inside, so individual wires could be unsoldered if need be, on second thoughts, I decided that some form of screw terminal is preferred for ease of disconnection, and that's what I'm on with now.
On the original arrangement, individual wires could not be disconnected - every tagstrip had to be melted and prised apart from its mate.
Three of the existing loom wires aren't single colours but are red, with either white, black or yellow tracers. Such colours aren't available in the silicone flex that I use, so I've had to use three alternative colours. (Wires 9&10 on the tagstrip aren't part of the loom - they go direct to the field coil on the speaker). No doubt if I search internet I'd find the correct colours in cloth covered wire rather like the original, but I'm content with the silicone rubber flex in 'vintage' colours as supplied by Phil Marrison. (It will be evident which wire is which at both ends of the loom).
I'm not happy (appearance-wise) with the replica cap block I made from double sided PCB with two 8uF caps inside - it looks rather too 'aged' and overdone. I made and fixed a label (printed on brown wrapping paper) rather like the original which was in a cardboard box dangling loose. Then I went a step too far and dipped it in wax. While I'm revisiting the power supply, I'll fix a new label and just give it a coat of shellac. A bit daft some may think, because it's not on view, but I know it's there and to leave it like that would bug me. During the first ten years of my working life, most of the work I did was hidden from view in roof spaces and under floorboards, and I was my own 'quality controller'. I had a proper apprenticeship in the 1950s pre 'NVQ' era (Not Very Qualified?), where pride in what you do was instilled from the first day.
Hope that's of interest.
Although it's a better set-up than the old tagstrip arrangement, while still being close in appearance to the original, I'd intended to poke the loom wires through the turrets and solder them inside, so individual wires could be unsoldered if need be, on second thoughts, I decided that some form of screw terminal is preferred for ease of disconnection, and that's what I'm on with now.
On the original arrangement, individual wires could not be disconnected - every tagstrip had to be melted and prised apart from its mate.
Three of the existing loom wires aren't single colours but are red, with either white, black or yellow tracers. Such colours aren't available in the silicone flex that I use, so I've had to use three alternative colours. (Wires 9&10 on the tagstrip aren't part of the loom - they go direct to the field coil on the speaker). No doubt if I search internet I'd find the correct colours in cloth covered wire rather like the original, but I'm content with the silicone rubber flex in 'vintage' colours as supplied by Phil Marrison. (It will be evident which wire is which at both ends of the loom).
I'm not happy (appearance-wise) with the replica cap block I made from double sided PCB with two 8uF caps inside - it looks rather too 'aged' and overdone. I made and fixed a label (printed on brown wrapping paper) rather like the original which was in a cardboard box dangling loose. Then I went a step too far and dipped it in wax. While I'm revisiting the power supply, I'll fix a new label and just give it a coat of shellac. A bit daft some may think, because it's not on view, but I know it's there and to leave it like that would bug me. During the first ten years of my working life, most of the work I did was hidden from view in roof spaces and under floorboards, and I was my own 'quality controller'. I had a proper apprenticeship in the 1950s pre 'NVQ' era (Not Very Qualified?), where pride in what you do was instilled from the first day.
Hope that's of interest.
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
