Quote Originally Posted by BillWojo View Post
I have never seen Altec horns with a threaded throat, not saying they don't exist but I think in the USA they were probably all made with the flange end. Does your horn have a bolt on adapter? Rectangular where it meets the horn, held on with 4 bolts. If so replace them with 30162 adapters. I'd keep an eye out on ebay for a set. Stuff like that always pops up. Actually, there is a couple listed right now. You can't get them made for that price.
A picture of what you have would be interesting.

BillWojo

Lansing Mfg. horns were built with the threaded throat until 1940 (except for the H808 that had the flange end from the beginning), but the horns were of course used long after that. When replacement drivers were needed an adapter had to be used and I have read that such adapters were made. AGA-Baltic probably used the threaded throat longer than Lansing. The threaded throat is bolted on, but the 30162 will not fit, unfortunately.

I'll be going away for a couple of weeks tomorrow morning, but I'll try to post pictures when I get back. I'm a computer illitterate, but I'll do my best.