Celestion HF 1300 expert needed

[bumpy]

Thanks

Another question - were the early HF1300s fitted with alnico magnets?

[spendorman]

Thanks

Another question - were the early HF1300s fitted with alnico magnets?

Depends on what one means by early, the ones used in Ditton 10, Ditton 15, County etc. had a smaller ceramic magnet, and were lower impedance 4 Ohm, like these:

https://images.duckduckgo.com/iu/?u=...4_ohms.jpg&f=1

To me, the really interesting one is the HF1400, has a bigger magnet than any of the others, used in some BBC speakers and B&W DM3. I would like to obtain more information on them. I have a pair of DM3's and a spare pair of HF1400's. I am tempted to try the 1400's in my LS3/6's, I suspect that they would be a bit more sensitive, but that is easily adjusted using the taps on the autotransformer.

[SPS]

Depends on what one means by early, the ones used in Ditton 10, Ditton 15, County etc. had a smaller ceramic magnet, and were lower impedance 4 Ohm, like these:

https://images.duckduckgo.com/iu/?u=...4_ohms.jpg&f=1

To me, the really interesting one is the HF1400, has a bigger magnet than any of the others, used in some BBC speakers and B&W DM3. I would like to obtain more information on them. I have a pair of DM3's and a spare pair of HF1400's. I am tempted to try the 1400's in my LS3/6's, I suspect that they would be a bit more sensitive, but that is easily adjusted using the taps on the autotransformer.

I have a pair of very large magnet version in a LS5/1a... where these the 1400 ?

[spendorman]

Just looking here

http://www.markhennessy.co.uk/rogers/others.htm

Seems like the LS5/5 used the HF1400

Yours, seem to have 2 x HF1300

[SPS]

Just looking here

http://www.markhennessy.co.uk/rogers/others.htm

Seems like the LS5/5 used the HF1400

Yours, seem to have 2 x HF1300

Thanks for linking that it's an interesting read
The difference in size and efficiency is staggering between the 70's versions I have and these early sixtys bbc 'specials'
I also have a pair of the gec versions which sound very nice and are still quite efficient
Thanks

[walpurgis]

Yes. Those were the days. None of yer nasty ferrofluid nonsense back then .

Even by modern standards, the HF1300 tweeter is quite remarkable. Its ability to show transparency and render detail through the upper mid and into the treble region is outstanding. It reproduces ambience superbly.

It can show a touch of hardness and is tonally awkward to integrate with other drivers.

I built these around 1980, they worked rather well. 6 1/2 inch Audax bass/mid if I recall.



The HF1300 tweeters came from Denys Trickett. Anybody remember him?

[bumpy]

I suppose my question should have been "Were HF1300s ever supplied with alnico magnets?"

[walpurgis]

I suppose my question should have been "Were HF1300s ever supplied with alnico magnets?"

Yes. I have a 16 ohm pair.

[spendorman]

"Denys Trickett. Anybody remember him?"

Yes, never met him though, remember that one had to go up stairs to his place.

[bumpy]

Yes. I have a 16 ohm pair.

Cool.
Is there any way of knowing?