UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Simon Gittins · 6th May 2019, 5:16 pm

It sounds likely that there is something sitting on the loudspeaker cone, rust for example, and it might be easily cleared with the speaker removed. Another test you could try is with the fault present, hold the set upside down and see if gravity reduces the distortion.

One way of extracting the speaker would obviously be to remove the chassis first (which is quite involved). If you did this you would want to test the speaker with another source before putting it all back. Looking at my example, two of the speaker nuts are easily accessible and the third isn't (I think there are only three). You might be able to get the third nut out by undoing the hinges and then using pliers but I have never tried this!

It's the same details on my speaker.

6th May 2019, 5:16 pm	#4
Simon Gittins Heptode Join Date: Jan 2006 Location: Cornwall, UK. Posts: 506	Re: Vidor CN429 Lady Margaret rattling sound It sounds likely that there is something sitting on the loudspeaker cone, rust for example, and it might be easily cleared with the speaker removed. Another test you could try is with the fault present, hold the set upside down and see if gravity reduces the distortion. One way of extracting the speaker would obviously be to remove the chassis first (which is quite involved). If you did this you would want to test the speaker with another source before putting it all back. Looking at my example, two of the speaker nuts are easily accessible and the third isn't (I think there are only three). You might be able to get the third nut out by undoing the hinges and then using pliers but I have never tried this! It's the same details on my speaker. Last edited by Simon Gittins; 6th May 2019 at 5:24 pm. Reason: Clarification.