Ditton 15 crossovers

[guypettigrew]

A mate has just bought a pair of Celestion Ditton 15s.

Can someone please confirm this is the crossover design?

It says ditton 25 when you open the link, but it's what came up when I searched Google for Ditton 15 crossovers. Odd!

Thanks.

Guy

 

[nat8808]

I don't think so - I think it's simpler than that.

Doing Google image search shows a couple of eBay listings with photos of the early ones and later XR versions:

http://www.ebay.co.uk/itm/RARE-60S-70S-CELESTION-DITTON-15XR-CROSSOVER/161115847583

http://www.ebay.co.uk/itm/Celestion-Ditton-15-Crossover-/221273742083

Two inductors and a capacitor.

Here's someone's blog page on upgrading the crossovers:

http://www.briarsfield-hifi.co.uk/celestion_ditton_15.htm

It's not too odd a Google result as the picture appears on a thread about Celestion 25 and was posted on 15th June 2012 . Even so, Google is happy just to give just a single term result when it runs out of better matches.

 

[diceman]

The picture you posted is just a generic "3rd order buttorworth" and I doubt it related to the Ditton 15.

The Ditton 15 (early version/non XR) is reported as having first order on bass and second order on treble which would tally with the simple 3 components seen in the eBay image.

 

[guypettigrew]

Thanks chaps, much appreciated.

Looks like just one capacitor in series with the tweeter. Very straightforward.

Looking around the 'net I've found two values for this. Why is life never easy?!

The first suggestion on the Briarsfield site is 4.7uF. A standard value to go in series with a tweeter. On another forum, though, someone has posted the value as 12uF. The images on the two eBay adds aren't quite clear enough. although one looks like either 4.7 or 6.7uF. The latter would be an odd value!

Anyone have a definitive answer, please?

Thanks.

Guy