Re: WWII 800 found in the wild
From the photos,the enclosure looks well made.You should try storing the LU 1004 cone down ( less chance of a tip over) also if the inner suspension is the old fiber
spider type - storing cone down reduces the chance of shop dust and or iron filings getting into VC gap.I am almost certain that LU1004 was made by Jensen - who also made for Western Electric, it has a ring type magnet & most times the plates were welded on. If electro/mechanically ok you have a Gem aprox 65 to 75 yrs old.
The frame/basket not a casting,so care has to be taken not to warp or twist, also cone especially outer suspension fragile,material tends to become sensitive with age
(aviod finger poking)Could you show picts of inner suspension in the next thread. "A great acquisition"
Re: WWII 800 found in the wild
Re: WWII 800 found in the wild
Great photos, the LF speaker is just like I remembered, that cone is in remarkable condition, it has newer style inner suspension (corrugated) not older fiber spider type.I am curious to know if cone extrusion is the same when using a battery then reversing polarity.(Cone total out + same as total in -) It looks super clean,what's
the trick? Pity about broken HF Diaph. cover.Looks as though moisture may have got inside.Have you ever removed & replaced a diaphragm.... take extreme extreme
care.... screwdriver blade attraction into strong magnet field behind diaphragm.I am willing to help via phone,if you care just contact.
Re: WWII 800 found in the wild
The horn pictured is indeed the urethane plastic model. These were painted gray, though the foamed plastic was orange. The example I have does not have the metal inserts at the stud holes, though I have seen others that did like the horn in the pictures. To the best of my knowledge these plastic jobs were produced toward the end of WWII when all available aluminum was being used to build airplanes. An old timer told me that these urethane horns were infamous for failing due to cracks. As an aside, I have heard of 415 field coil theatre woofers produced during this period developing cracks in their baskets. They may have been cast in some crummy pot metal at the time, again due to the aluminum shortage.
IPC/Simplex purchased tons of Lansing and Altec Lansing gear. They built projectors but supplied complete systems to theatres, obtaining components they didn't build themselves from vendors like Lansing, Altec Lansing and Jensen. This relationship extended back to 1937; I have a pair of IPC LU-1011 compression drivers that are really Lansing 285 models with the radial slit phasing plug. So far I have found four companies that bought and relabeled the Lansing/Altec Lansing field coil era components: RCA (USA), IPC/Simplex (USA), Raycophone (Australia), and AGA Baltic (Netherlands). There may be more, as every time I think I have seen it all something new pops up!
Re: WWII 800 found in the wild
Some of the IPC LU-1004's that Marty has.Were definitely manufactured by Jensen under license from Western Electric.Probably right around or just before Altec came into the picture.
Marty does this look familiar ?
1940′s International Projector Corp. LU-1004
Re: WWII 800 found in the wild
I can confirm the woofer is Jensen A15-PM which is the same as Western KS 12004 from the 753C I found this picture in an auction with the Jensen numbers on the KS woofer. The magnet structure on the IPC unit looks like that used on the A12-PM and the bracket holding the terminals looks like a Jensen transformer bracket from the same period. Too bad I don?t have a pair.
http://i142.photobucket.com/albums/r...004/A15-PM.jpg
