Two Bush radios repaired.

[Geordie McBoyne]

Recently repaired two Bush valve radios. The first was a DAC90 which would only work upside down. The cause of the fault turned to be the upper tuning slug in the first IF transformer had become detached from the adjustment screw.
In previous repairs of this kind it was a simple matter of removing the screws which attach the bar that carries the adjustment screw. No so with this one, the bar was rivetted into position. The rivets were drilled out, the bar removed and sure enough the ferrite tuning slug was detached from the screw. Super glue used to reattach the tuning slug.
After reassembly it was found no adjustments were required to peak up the IF transformers.

The other set was a DAC90A. The two pin mains connector was broken, didn't have a replacement so the mains lead was wired directly to the switch. The attachment shows how it was done. An insulating disc will be made to cover the screws. Also needing attention was replacement of certain TCC 343 wax capacitors. All components connected to pin 4 of the UL41 were relocated to an adjacent tag on the component group board.

Geordie McBoyne.

[bobhowe]

Hi David nice to see that you are doing nice repairs none of the modern rubbish done the same as you on one of my Bush DAC90A made it have a fixed mains lead using a Paxolin disc of a scrap Bush AC34 Chassis wonder how many Bush DAC90 were retired when the slug on the first IF transformer tuning slug becoming detached was this due to the excess heat from the octal valves and the mains dropper kind regards Bob

[Murphyv310]

Hi David.
A nice couple of quickies there and a good result.
What did you do in the afternoon?

[bobhowe]

Hi Trevor David spent the afternoon cleaning an examining the Drummond Lathe which he has on anther thread here kind regards Bob

[Geordie McBoyne]

The DAC90A now has an internal fuse.
Also, a plastic disc fitted over mains lead paxolin disc in order to prevent any possibility of anyone touching the screws.

DFWB.

[bobhowe]

Hi David good idea fitting a internal fuse as some one could fit a 13A killer fuse in the plug top & the plastic disc will do the internal fuse modification on all of my sets kind regards Bob