View Full Version : JBL 16 Ohms L-pad
spirou38
01-02-2007, 07:27 AM
Happy new year everybody :wave: .
I'm looking for 2 JBL 16 Ohms L-pad for my 4333A but can't find any in France :crying: .
Is there anybody who knows where I can find those parts :confused: ?
Or is there a possible adaptation of a 8 Ohms with an additional 8 Ohms resistance :idea: ?
Thank you.
Pascal
4313B
01-02-2007, 07:41 AM
I'm trying to find another source as well (with 1" shafts). I cleaned JBL out of their remaining stock.
Guido
01-02-2007, 09:12 AM
I believe I can still have them from JBL Pro here.
They are expensive! I believe > 20Euros. Should I try it?
macaroonie
01-03-2007, 03:14 AM
These are 16 ohm 30 watt from 3114 network. Pm me if you need them
spirou38
01-03-2007, 03:42 AM
I'm trying to find another source as well (with 1" shafts). I cleaned JBL out of their remaining stock.
Hello Giskard,
Happy newyear.
Thank you for your answer. As Guido is closest from France, don't worry for those 16 Ohms l-pads for the moment. I will keep you informed if Guido doesn't succeed in getting them.
Best regards.
Pascal
spirou38
01-03-2007, 03:44 AM
I believe I can still have them from JBL Pro here.
They are expensive! I believe > 20Euros. Should I try it?
Hello Guido.
Happy newyear.
Of course you can try :applaud: Please keep me informed.
Many thanks.
Pascal
spirou38
01-03-2007, 03:46 AM
These are 16 ohm 30 watt from 3114 network. Pm me if you need them
Hello Macaroonie,
Thank you for your answer and happy newyear.
As I answered Giskard, Guido is closest from France, so don't worry for those 16 Ohms l-pads for the moment.
Best regards.
Pascal
Guido
01-04-2007, 02:16 PM
:shock: 37 Euro EACH! :eek:
spirou38
01-04-2007, 02:36 PM
:shock: 37 Euro EACH! :eek:
Ooops :blink:
Parts from JBL Germany seem to be as expensive as from JBL France :( ( but that part is discontinued in France ).
I think I will ask Giskard if he has a cheapest solution !
Thanks for your inquiry.
boputnam
01-05-2007, 05:33 PM
One should ponder all the ramifications given these three impedance curves...:eek:
The Red curve confounds me - I would have thought "wide open" to have the least impact, yet the impedance spikes. I guess I pick Green.
Yikes...
macaroonie
01-05-2007, 08:12 PM
They are still here at no big cost I have no use for them. May cost you a nice bottle of something from La France. Allez Allez
4313B
01-05-2007, 08:16 PM
They are still here at no big cost I have no use for them. May cost you a nice bottle of something from La France. Allez AllezCan't beat that deal. Do it. :)
spirou38
01-06-2007, 01:17 AM
The spikes are because there aren't any shunt resistors in the circuit while the L-Pads are wide open. Green looks good but the 4355 network is "looking" for the yellow curve in post #10. Which is actually "ok", higher impedance means smaller network values and that means lower cost.
You can try replacing the 16-ohm L-Pads with 8-ohm L-Pads and then put a 4 ohm series resistor in front of the 8 ohm L-Pad. Here I used a 4.7 ohm because it's all I had laying around within easy reach.
Red = 2421B 2307 2308 with 20 ohm shunt 16 ohm L-Pad at 50 percent.sini
Green = 2421B 2307 2308 with 20 ohm shunt 8 ohm L-Pad at 50 percent and 4.7 ohm series.sini
Hello Giskard,
Thank you for those very interesting tests and explanations :applaud: .
spirou38
01-06-2007, 01:21 AM
They are still here at no big cost I have no use for them. May cost you a nice bottle of something from La France. Allez Allez
Hello Macaroonie,
Very nice proposition :D .
I just discovered that you also are living close to France :crying: .
I send you a private mail.
Bruno GINARD
01-06-2007, 02:25 AM
Hello SPIROU 38
I've bought the 100 watts models / 16 ohms directly on Parts Express web site
THey have a 20/20 service !
http://www.partsexpress.com/webpage.cfm?&WebPage_ID=3&filter=l+pad&sm=1&so=1
Good luck !
spirou38
01-06-2007, 02:39 AM
Hello SPIROU 38
I've bought the 100 watts models / 16 ohms directly on Parts Express web site
THey have a 20/20 service !
http://www.partsexpress.com/webpage.cfm?&WebPage_ID=3&filter=l+pad&sm=1&so=1
Good luck !
Hi Bruno,
I previously had a look on their web site but they don't have the 1" shaft model that is suitable for the 4333A, they just have the 3/8" :thnkfast:
I sent them an email asking for the 1" and they can't get it :(
Guido
01-06-2007, 03:35 AM
Hi Bruno,
I previously had a look on their web site but they don't have the 1" shaft model that is suitable for the 4333A, they just have the 3/8" :thnkfast:
I sent them an email asking for the 1" and they can't get it :(
Spirou,
the 4333 should use a spacer at the L-Pad shaft! So you probably don't need a 1" L-Pad. Check this.
spirou38
01-06-2007, 04:02 AM
Spirou,
the 4333 should use a spacer at the L-Pad shaft! So you probably don't need a 1" L-Pad. Check this.
Hello Guido,
Yes there is a 8 to 10 mm spacer. Probably 1/3" ?
1" shaft = 25.4 mm
better usable lenght of 1" shaft = 25.4 - 10 (spacer) = 15.4 mm
3/8" shaft = 9.5 mm
So, when removing it, it will be short of about 5 or 6 millimeters :(
macaroonie
01-06-2007, 08:00 AM
I think this will clear matters up
Guido
01-06-2007, 09:44 AM
It's crystal clear that using a shorter shaft with the same spacer won't work.
It's also crystal clear that using no spacer won't work either.
What about using the partsexpress L-Pads and modify the spacer?
Bingo!
spirou38
01-06-2007, 12:35 PM
I think this will clear matters up
Hello Macaroonie,
They will be perfect for me :D
Did you received the private mail I sent this morning ?
spirou38
01-06-2007, 12:41 PM
It's also crystal clear that using no spacer won't work either.
Yes because the cables are attached to the plate just under the l-pad.
What about using the partsexpress L-Pads and modify the spacer?
The partsexpress shaft is 3/8" that is not long enough even without spacer :(
Zilch
01-06-2007, 12:49 PM
Somebody needs to find or start making shaft extensions or "long" knobs.... :(
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