Tuning cord on Beomaster 2000 - UK Vintage Radio Repair and Restoration Discussion Forum

Michael Maurice · 30th Apr 2017, 11:56 pm

This is the second one of these with the same problem except in this case the little pulleys were missing.

What happens is that due to fatigue, the plastic section which holds the tuning cord pulley, breaks up with the effect that the pulley comes away and gets lost.

My solution to this was to use a plastic M3 5mm spacers. Place the spacer onto an M3 screw and hold it place with a threaded spacer. Put the threaded part of the spacer in the chuck of a drill and with a saw blade or knife cut a grove in the plastic spacer.

Now for the first spacer and the one that normally fails at the edge of the tuning plate where the metal bar is:

Cut out the plastic where the pillar had failed so that it is flat with the main plastic panel.

Drill a 2.5mm hole in the place where the original pillar was. Use a 3mm drill to drill the plastic only and tap the metal under it with an M3 tap.

Using an M3 20mm screw, put the plastic spacer on the screw, then put an M3 5mm threaded spacer on it but do not tighten it. The plastic spacer must be free to rotate.

Now screw the assembly through the plastic and onto the metal that you've just tapped. Tighten the assembly but ensure the plastic spacer is free to rotate so use a pair of pliers on the metal threaded spacer to tighten up the screw.

With the second one which shouldn't really need doing, drill a 3mm hole in the plastic near where the original pillar was and use a nut underneath to secure the screw and threaded spacer.

The picture show the end result.

Michael Maurice · 2nd May 2017, 9:56 pm

These receivers have a very odd arrangement for powering the lamps. it requires the tuning bar lamp to be working to power the on and MPX lamps, but the manual doesn't give any details of what that bulb should be.

I decided to slightly modify the circuit.

I bypassed R2 & removed R4 and Zener D1.

I fitted a 7812 regulator on the heatsink with the input going to the 26V and the output to the 12V line. I then connected the dial lamp across that 12V rail. The tuning lamps were left alone.

30th Apr 2017, 11:56 pm	#1
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,225	Tuning cord on Beomaster 2000 This is the second one of these with the same problem except in this case the little pulleys were missing. What happens is that due to fatigue, the plastic section which holds the tuning cord pulley, breaks up with the effect that the pulley comes away and gets lost. My solution to this was to use a plastic M3 5mm spacers. Place the spacer onto an M3 screw and hold it place with a threaded spacer. Put the threaded part of the spacer in the chuck of a drill and with a saw blade or knife cut a grove in the plastic spacer. Now for the first spacer and the one that normally fails at the edge of the tuning plate where the metal bar is: Cut out the plastic where the pillar had failed so that it is flat with the main plastic panel. Drill a 2.5mm hole in the place where the original pillar was. Use a 3mm drill to drill the plastic only and tap the metal under it with an M3 tap. Using an M3 20mm screw, put the plastic spacer on the screw, then put an M3 5mm threaded spacer on it but do not tighten it. The plastic spacer must be free to rotate. Now screw the assembly through the plastic and onto the metal that you've just tapped. Tighten the assembly but ensure the plastic spacer is free to rotate so use a pair of pliers on the metal threaded spacer to tighten up the screw. With the second one which shouldn't really need doing, drill a 3mm hole in the plastic near where the original pillar was and use a nut underneath to secure the screw and threaded spacer. The picture show the end result. Attached Thumbnails __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/

2nd May 2017, 9:56 pm	#2
Michael Maurice Moderator Join Date: Feb 2006 Location: Wembley, Middlesex Posts: 7,225	Re: Tuning cord on Beomaster 2000 These receivers have a very odd arrangement for powering the lamps. it requires the tuning bar lamp to be working to power the on and MPX lamps, but the manual doesn't give any details of what that bulb should be. I decided to slightly modify the circuit. I bypassed R2 & removed R4 and Zener D1. I fitted a 7812 regulator on the heatsink with the input going to the 26V and the output to the 12V line. I then connected the dial lamp across that 12V rail. The tuning lamps were left alone. Attached Thumbnails __________________ Forum Moderator http://www.michaelmauricerepairs.co.uk/