UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - What sort of output coupling Capacitor on a Ravensbrook

G6ONEDave · 1st Jul 2020, 4:34 pm

Having just had chance to check into my previous comments re increase of speaker coupling capacitor. The value increase could supply more bass to the loudspeaker, which in turn may or may not be able to handle it at medium to high drive levels. This could cause the loudspeaker cone to move excessivly and either get too hot or end up becoming distorted with the windings being damaged by the magnet metal work. And then subsequently damaging the amplifier, it all depends on what everything was rated at, as whether it would be safe to do.
This is all somewhat mutual, since the correct capacitors are in stock and available. Having checked on Farnell's web page, whilst placing an order, I found that they have 1500uf in 16, 25, 35 and 63v radial can types. If you really want to go for it, they also have 400v and 450v types, mind you, you would need deep pockets for those!

1st Jul 2020, 4:34 pm	#19
G6ONEDave Octode Join Date: Dec 2019 Location: Owston Ferry, North Lincolnshire, UK. Posts: 1,704	Re: What sort of output coupling Capacitor on a Ravensbrook Having just had chance to check into my previous comments re increase of speaker coupling capacitor. The value increase could supply more bass to the loudspeaker, which in turn may or may not be able to handle it at medium to high drive levels. This could cause the loudspeaker cone to move excessivly and either get too hot or end up becoming distorted with the windings being damaged by the magnet metal work. And then subsequently damaging the amplifier, it all depends on what everything was rated at, as whether it would be safe to do. This is all somewhat mutual, since the correct capacitors are in stock and available. Having checked on Farnell's web page, whilst placing an order, I found that they have 1500uf in 16, 25, 35 and 63v radial can types. If you really want to go for it, they also have 400v and 450v types, mind you, you would need deep pockets for those!