A Wee Custom JBL 2-Way

[Don McRitchie]

1

[pelly3s]

WHY!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!?!? I need that lol

[dancing-dave]

Super Duper coaxial speaker

[Mr. Widget]

Any guesses about those woofers? Lans-a-loy surrounds but not LE15A magnets or top plates....:blink:


Widget

[speakerdave]

135A's

[Don McRitchie]

They are 150H's that are supposedly LE15A cone kits in a 130A chassis.

[Zilch]

There, SEE?

Two-ways RULE!!

[Heh, heh....]

:duel:

[JBLnsince1959]

Damn.... :banghead: , they copied my design for a big center channel :p

[JBLnsince1959]

what was this used for??

[Maron Horonzakz]

That is my future system powered by a 1 watt single ended 300B amp.:D

[Wardsweb]

:banana:WOO HOO

Can You Say SPL?

Just think what all those drivers are worth now.

[clmrt]

NASA's new non-liquid-fuel solution.


Backstage at the Who.

?

[Don McRitchie]

what was this used for??

I'm fairly certain that it is an aerospace test facility used to simulate the sonic and vibration conditions of a rocket launch. Both Altec (see attached photo below from Lee Sound Designs site (http://www.leesound.com/bw_photos/index.html)) and JBL had a hand in a number of such facilities in the 1950's and 60's. In particular, the background of Bill Thomas (JBL's owner of that era) was in the aerospace field.

http://www.audioheritage.org/html/people/thomas.htm

Even after buying JBL, Bill Thomas wholly owned an independent company called Transducers Inc. whose primary work was builting such facilities. Around four years ago, a whole bunch of Transducers Inc. drivers began showing up on Ebay when a similar test facility at the White Sands Missle Range was decomissioned. The HF drivers were labeled "375H Manufactured by JBL for Transducer's Inc." The LF drivers were labeled 150H with the same Transducers Inc. brand. It should be noted that JBL later used the 150H model number for the rebranded E145 woofer in the Everest, to which these drivers bore no relationship.

Someone from JBL of that era (it may have been Harvey Gerst) recently told me that the 150H was nothing more than a 130A chassis with an LE15A cone kit. The LE15A cone kit is much heavier and more rugged than the 130A's light cone, which would otherwise be too easily driven to destruction. The drivers were all painted the same blue colour as the original LE series drivers which would date them from the early 60’s.

It was comical to see them advertised on Ebay as rare hi-fi drivers. Some auctions even alluded to the 150H as being the driver from the Hartsfield, confusing it with the 150-4C. I’m not sure if there were any physical differences in the 375H compared to the standard 375. The diaphragm was still aluminum and not the later high power phenolic version. However, I can’t imagine an LE15A cone kit in a 130A chassis having a “hi-fi” response.

I don't know anything specific about this particular photo. It was just forwarded to me a couple of days ago by Mark Gander after one of his aquaintances pointed out to him that it had been posted on the Telecaster forum (http://www.tdpri.com/) and wanted to know the background.

Don

[JBLnsince1959]

sounds like a good lead-in for a new section in the historic library. JBL's used in aerospace test facilities......

[Don McRitchie]

Unfortunately, the above pretty much exhausts my knowledge on the subject and I have yet to come across anyone that was directly involved in these projects.

Don

[JBLnsince1959]

Unfortunately, the above pretty much exhausts my knowledge on the subject and I have yet to come across anyone that was directly involved in these projects.

Don

Bummer....of course finding people that did this that long ago ( 1950's and 1960's) would be tough. Most would be in their mid to late 70's to 90's IF they were still around.....

[Titanium Dome]

Bummer....of course finding people that did this that long ago ( 1950's and 1960's) would be tough. Most would be in their mid to late 70's to 90's IF they were still around.....


...and IF they could still remember accurately.

My kids tell me I can't even remember the 1980s accurately, and I'm only in my 50s.

[johnaec]

Don't forget this pic from a post a while ago. 'Looks pretty current to me:

John

[JBLnsince1959]

...and IF they could still remember accurately.

My kids tell me I can't even remember the 1980s accurately, and I'm only in my 50s.

well, with our generation we had some HELP forgetting.. There are somethings about the late 60's and 70's I SWEAR I did but I didn't; and some things I forgot completely only to have my friends tell me I did. DAMN!!!!!! :D

[edgewound]

It's not unusual for these items to be used in other-than-audio applications. The 2402 has been used in applications where it's used as a receiver to change traffic signals for approaching emergency vehicles. Large format compression drivers have also fairly recently been used in research for refridgeration systems.

These historical photos are great! I hope we can see more.

[JBLnsince1959]

Large format compression drivers have also fairly recently been used in research for refridgeration systems.



yes, In fact the last picture is a European snow-cone maker. :D

[Titanium Dome]

yes, In fact the last picture is a European snow-cone maker. :D


I thought it was my ex-wife's hair curling machine. :rotfl:

[edgewound]

We learn something here everyday...don't we gentlemen?
Here's a preview of Thermoacoustic Refrigeration. Coming to a Ben & Jerry's near you:
[PDF] Thermoacoustic refrigeration for space applications (http://www.google.com/url?sa=U&start=4&q=http://pdf.aiaa.org/GetFileGoogle.cfm%3FgID%3D73148%26gTable%3Dmtgpape r&e=7388) File Format: PDF/Adobe Acrobat
this bias against advanced refrigeration research and. development was the creation. ... by Harmon-JBL and modified by their enginccr, Fanchcr. Murray. ...
pdf.aiaa.org/GetFileGoogle. cfm?gID=73148&gTable=mtgpaper - Similar pages (http://www.google.com/search?hl=en&lr=&q=related<img src=)

Thermoacoustic Refrigeration - Real Cool (http://www.google.com/url?sa=U&start=2&q=http://www.compukiss.com/populartopics/entertainmenthtm/article1155.htm&e=7388)
Wouldn't it be cool if the music of the Grateful Dead could keep Cherry Garcia
ice cream cold? Ben & Jerry's recently announced...
www.compukiss.com/populartopics/ entertainmenthtm/article1155.htm - 28k - Cached (http://66.102.7.104/search?q=cache:2US-KTO-4pwJ:www.compukiss.com/populartopics/entertainmenthtm/article1155.htm+Thermoacoustic+refrigeration&hl=en&start=2) - Similar pages (http://www.google.com/search?hl=en&lr=&q=related:www.compukiss.com/populartopics/entertainmenthtm/article1155.htm)
Thermoacoustics - Sounds Cool! (http://www.google.com/url?sa=U&start=5&q=http://www.benjerry.com/our_company/sounds_cool/&e=7388)
This Earth Day, Ben & Jerry's announces the development of a working thermoacoustic
refrigeration prototype - an environmentally friendly, ...
www.benjerry.com/our_company/sounds_cool/ - 13k - Aug 9, 2005 - Cached (http://66.102.7.104/search?q=cache:rAKT9cvGaR0J:www.benjerry.com/our_company/sounds_cool/+Thermoacoustic+refrigeration&hl=en&start=5) - Similar pages (http://www.google.com/search?hl=en&lr=&q=related:www.benjerry.com/our_company/sounds_cool/)

Click on the link in this last one to see the video about this technology...
Real cool:bouncy:

[JBLnsince1959]

I thought it was my ex-wife's hair curling machine. :rotfl:


Damn...what did her hair look like "Bride of Frankenstein"?


....then again, I bet it makes a noise as loud as one of my old girlfriends when they were having a "PMS" day..

[JBLnsince1959]

I did a little research and sure enough there were some tests done to see how it could be used for hair. Here's one the first subjects to try it as a test

[JohnK]

I once purchased 4 150-4c mint in unopened boxes, the ship-to address was Lockheed in Sunnyvale.

[Donald]

Uh, were they wired in series, parallel or direct to individual amps? :)

[JBLnsince1959]

I've done some more reading on the use of that machine for hair treatments. Seems that after they worked out the "kinks" in the machine they we able to do much more with it. Here's some more......

[57BELAIRE]

It's not unusual for these items to be used in other-than-audio applications. The 2402 has been used in applications where it's used as a receiver to change traffic signals for approaching emergency vehicles. Large format compression drivers have also fairly recently been used in research for refridgeration systems.

These historical photos are great! I hope we can see more.

...2402's were also used as a device for counting railroad cars passing a certain checkpoint...they were usually painted army green.