29-09-2024, 01:45 PM
Moved on.
I found some grain of wheat wire ended bulbs in my stock, soldered them into the holders on the tuning scale back sheet.
Then I had to face the restringing of the tuning drive.
For such a simple system, it was inordinately difficult Several attempts resulted in the cord slipping off the drum when at the end of the travel. The grooves in the drum are very fine and my cord was a bit thicker than the original.
I pre-stretched a length of 1mm bead cord overnight and carefully threaded it round the pulleys and spindle before winding 3 turns onto the drum. After much cursing and several attempts I managed to get the drive to work and with the spring out of the way of where the pointer has to be attached which was the final hard part.
I soldered the light bulb wires back on and fitted the MES bulbs, refitted the tuning scale back sheet to the pcb and tested the set.
Everything worked, including the sneaky tone control. It is a pull/push on the volume control potentiometer and mains switch, very unusual but effective. Where one would ever find a replacement control is a moot point.
I wonder how many owners have never realised that there is a tone control on these sets?
Finished the reassembly and soak tested, all good.
So a tricky repair, a patience tester. I will deliver it to the recipient later, hoping to never see it again!
I found some grain of wheat wire ended bulbs in my stock, soldered them into the holders on the tuning scale back sheet.
Then I had to face the restringing of the tuning drive.
For such a simple system, it was inordinately difficult Several attempts resulted in the cord slipping off the drum when at the end of the travel. The grooves in the drum are very fine and my cord was a bit thicker than the original.
I pre-stretched a length of 1mm bead cord overnight and carefully threaded it round the pulleys and spindle before winding 3 turns onto the drum. After much cursing and several attempts I managed to get the drive to work and with the spring out of the way of where the pointer has to be attached which was the final hard part.
I soldered the light bulb wires back on and fitted the MES bulbs, refitted the tuning scale back sheet to the pcb and tested the set.
Everything worked, including the sneaky tone control. It is a pull/push on the volume control potentiometer and mains switch, very unusual but effective. Where one would ever find a replacement control is a moot point.
I wonder how many owners have never realised that there is a tone control on these sets?
Finished the reassembly and soak tested, all good.
So a tricky repair, a patience tester. I will deliver it to the recipient later, hoping to never see it again!
Boater Sam.
