909-8A: 400Hz tractrix horn?

[adam_ecofan]

hi geekstar,

thanks for your input - will digest
and post again.

have the A700's to work with so
whatever solution will give best
results (am ok with compromise)

radial horns seem the easiest to
work with - turning a 3ft horn flare
looks like a 'major'. less material
and dispersion/reflection control too.

my friend who can negotiate
hornresp and leap quite keen to
make a series of flares and make
objective/subjective comparisons
- don't have to get it right first time...

nz has some great native timbers
if we go with that instead of ply. is
density the key? eg high pressure
laminate 1450kg/m3, keruing ply
about 800kg/m3 and aussie hoop pine
comes in at 600kg/m3.

anyhow,

cheers,

adam

[Altec Best]

It's better to link into them from a photo site like (photobucket,Flickr,) by posting the full size IMG code.This site has a auto resizer that makes them smaller.

[jmarkwart]

Adam,

Check out this Sound Practices article about Altec 909s, 515-8Gs and tractrix horns.
http://home.earthlink.net/~jmarkwart...spexemplar.pdf

Jeff

[adam_ecofan]

hi jeff,

thanks for the link - actually, the exemplar is
my original inspiration for converting the A700's
- had wondered about getting in touch with the
designers but thought i should come and meet
with the altec fans and consult.

very pleased to make your acquaintance -
what a fantastic looking beast the exemplar is,

cheers,

a

[Geekstar]

hi jeff,


- had wondered about getting in touch with the
designers but thought i should come and meet
with the altec fans and consult.

Yeah, forget the Exemplar designers...talk to Jeff instead of those jokers.

JR

[cradeldorf]

Those Exemplars are pretty cool. Never heard of them before tonight.

[adam_ecofan]

hi all,

glad there is atmosphere of bonhomie
round the forum - certainly better than
a hairsplitting contest...

news here: have to move the rig from
its warehouse lodging to a friends
double garage - turntables there though
- haven't treated them to vinyl yet so
something to look forward to,

warm regards,

a