My both basket were 2241 not 2240 as i remembered. I also measured the magnet gap and it shows that 2241 magnet gap is larger than 2240 so it wount fit properly.
My both basket were 2241 not 2240 as i remembered. I also measured the magnet gap and it shows that 2241 magnet gap is larger than 2240 so it wount fit properly.
Originally Posted by 1audiohack
Hi Barry,
i have a dead 2243 and opened it. The unit had previously been reconed, not sure what i saw was original, but guess it was.
Coil is very heavy, probably pure copper not alu wire, about 2 cm long on a former that looks identical to 2242.
The magnet is significantly bigger than on a 2242. I recall something like 22 cm. Think 2226 vs 2227 magnet.
The frame is not interchangable with 2242 for another reason. In 2242, the magnet top pole piece is basically at the same plane as the basket's spokes converging on the centre section that holds the magnet. On 2243, the basket is extended to the back by about a cm and holds the magnet from there, see my picture.
EDIT: i checked some pics on eBay and it seems some of the 2242H's recently on sale there have this extension to the back also. Not sure all of them have it, as this detail is not pictured often. So maybe i have to eat my words, i currently have no 2242 basket at hand to cross-check, unfortunately.
A difference apart from wire material definitely is the ribbing of the cone goes close to the dust cap in 2242; whereas the wide unribbed inner section near the dust cap is heavily reinforced with resin on my 2243's.
That rib structure is (i believe) designed to allow for gradual de-coupling of outer cone sections by introducing an intended controlled structural weakness to the cone with regard to lower mid and midrange frequencies.
Ralph
Last edited by gibber; 03-31-2016 at 03:06 PM. Reason: see above
Not sure the 2243H data is somewhere here on the forum already:
the unit pictured above showed fs=29Hz, Re=5.2Ohm, Zm= 76Ohm, Qms=2.9, Qes=0.21, Qts=0,195.
Vas wasn't measured.
Ralph
The Transducer section is a good place to look:
http://www.audioheritage.org/vbullet...hp?10653-2243H
Does anyone know if a 2245H driver chassis can take a 2242H recone kit?
Thanks
DM
It can't ( you can't put a 2242 kit in a 2245 chassis ).Does anyone know if a 2245H driver chassis can take a 2242H recone kit?
Thanks
DM
They have 2 different depth top-plates ( iow; gap depth ).
The 2245 chassis can accept a 2240 recone kit ( which is NLA as OEM but most likely available as an aftermarket kit ).
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