RARE Altec Lansing 511A Early Grey Sectoral Horn Large Format 1 Only Made USA | eBay
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Well, it's not a early large format driver 511E, but it is an early 511A, though not sure whether the second set of driver mounting holes is OEM, though it wouldn't surprise me since it was marketed as a paging horn, hence the lack of flange mounting holes.
GM
Those extra mounting holes look like the JBL small format layout.
I give his listing one "Duh!"
As the saying goes a little knowledge is dangerous...
Small Altecs were originally 3 bolt. HiFi drivers switched to two bolt for the two piece horns. This is set up for a 730A.
http://www.hostboard.com/forums/hbmc...2013/07/49.jpg
Is that where the JBL 3-bolt pattern came from?Quote:
Originally Posted by Old Guy
Jim Lansing continued to use the 3 bolt after Altec switched, so yes.
Top pic is an 801- field coil just before the 802....
http://www.hostboard.com/forums/hbmc...2011/11/31.jpg
Interesting. Thanks!Quote:
Originally Posted by Old Guy
I just notice he is the one who thought it cool to convert a duplex to a tweeter
Altec Lansing 604C Duplex Modified to Horn Tweeter with Mounting Board RARE Cool | eBay
Follow up- he changed it. Guy replied he called it "large format" because of the large front.
Change that rating to two "Duh"s
Can I get up off the floor now ? :emot15:Quote:
Originally Posted by Old Guy
Right, but did the early 511 come pre-drilled for it [and by association, JBL or similar drivers] since AFAIK the 511 didn't come along until at least the mid '50s, though the first I saw of it for sure [way up on a pole it's hard to tell size] was with the introduction of the 820's replacement, the Laguna system, which in retrospect was probably done to pay homage to Hilliard's then SOTA home HIFI system.Quote:
Originally Posted by Old Guy
GM