I have taken the speaker out of the cabinet to give it a good check over. As I mentioned the energising coil is actually OK which is quite a bonus for a radio of this age.
However the glue on the diaphragm holding the cone joint together has dried and parted and the central spider is only hanging on by about 20%.
There was also an awful lot of rubbing when the diaphragm was moved in and out, from all angles of pressure. So I have removed the energising coil assembly to get at the electromagnet poles, which turned out to be very rusty.
The worst of the rust was scraped away with a screwdriver then a light rub over with sandpaper. After that I brushed some Krust rust treatment on. I dont plan to do anything else as painting to help preserve from more rust will cause problems if the paint flakes off in future.
There are signs of green spot on the speech coil so I plan to give this a light coat of clear varnish.
From the outside the speaker cloth on this radio looks the same as many of my other mid 30's KB's, but on this radio with the speaker baffle removed you can see the original colours of the cloth. I have not seen this before and it must have looked very nice, with the green silk threads giving an overall effect of a shimmering green front with maroon vertical flecks. It must have looked very Art Deco. Has anybody got any original cloth spare.
The rather dull appearance from the outside.
Mike
However the glue on the diaphragm holding the cone joint together has dried and parted and the central spider is only hanging on by about 20%.
There was also an awful lot of rubbing when the diaphragm was moved in and out, from all angles of pressure. So I have removed the energising coil assembly to get at the electromagnet poles, which turned out to be very rusty.
The worst of the rust was scraped away with a screwdriver then a light rub over with sandpaper. After that I brushed some Krust rust treatment on. I dont plan to do anything else as painting to help preserve from more rust will cause problems if the paint flakes off in future.
There are signs of green spot on the speech coil so I plan to give this a light coat of clear varnish.
From the outside the speaker cloth on this radio looks the same as many of my other mid 30's KB's, but on this radio with the speaker baffle removed you can see the original colours of the cloth. I have not seen this before and it must have looked very nice, with the green silk threads giving an overall effect of a shimmering green front with maroon vertical flecks. It must have looked very Art Deco. Has anybody got any original cloth spare.
The rather dull appearance from the outside.
Mike
