No more 2402, 2404, or 2405 UHF drivers listed:
http://www.jblproservice.com/pdf/Tra...cer%20List.pdf
2404H-1 still available from parts for $300 apiece.
So, it's use the newer re-entrant polyester (mylar) diaphragm 2406 (ferrite) or 2407 (neodymium) compression drivers instead.
http://audioheritage.org/vbulletin/s...&postcount=351
These are 1" thread-on drivers which must be mated with a suitable horn/waveguide.
http://audioheritage.org/vbulletin/s...&postcount=327
I've explored JBL's offerings here:
http://audioheritage.org/vbulletin/s...5&postcount=52
http://audioheritage.org/vbulletin/s...8&postcount=56
And the DDS Engebreston waveguide here:
http://audioheritage.org/vbulletin/s...&postcount=333
See also:
http://www.jblpro.com/pub/cspels/CBT4%205-5-03.pdf
That's the $9.90 PT-F95 1" waveguide, I believe, #338800-001
Please post any other potentially suitable horns/waveguides in this thread, and any experience and/or test results for them for the benefit of forum members seeking UHF enhancement using 2406/2407 or similar UHF drivers....