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In Reply to: RE: Altec Lansing 19 Spekaer Re-Cap Advise posted by ssimon@wideopenwest.com on June 11, 2017 at 17:52:34
I would definitely keep the 19's. They are VERY good speakers.
(I'm jealous!)
I agree with jaynemo on not getting carried away with "high end" caps. Standard Jantzen or Audyn are fine. Spend the money saved on replacing the resistors with Mills wire-wound or equivalent.
Definitely replace the L-pads with new units. The Partsexpress L-pads are decent or order high quality mil-spec parts from Digikey, Mouser,etc.
Enjoy!!
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Freak out...Far out...In out....
Follow Ups:
Thanks for the response. So replacing the L-pads will make a difference? What is wrong with the ones that are there? Can't I just clean them with deoxit?
I suggested new L-pads due to the age of the originals. Being mechanical devices they do wear out. Cleaning may "fix" them but issues may return, likely sooner than later. Keep in mind that the signal is going through them so it is pretty important that the contacts are good.
I replace them as a matter of course with any vintage speaker.
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Freak out...Far out...In out....
Well, I took out the crossovers and took apart the L-pads and cleaned them up with Deoxit and now I get some better sound! But I am not getting any sound out of one of the horns. I took it out and I think the ground was off or it just fell off when I was pulling it out. I don't think the latter happened because I was very careful and slow doing this. Well anyway I tested the horn on a multimeter and I get nothing. No reading. I tested another small horn I have laying around and I get a reading. I opened up the back of the horn and I see nothing wrong with the diaphragm. What's up? Is it blown? I thought I was getting a little sound out of it a few days ago.
Yes the diaphragm is toast. The coil is apparently "open". You can not tell by looking at it that it is bad, but the multimeter does not lie. Get new diaphragms from Great Plains Audio. Probably not cheap, but keep in mind that any money you put into these speakers is a safe investment. You should have no problem getting your full investment back.
For the L-pads from partsexpress you want the 100 watt model. You have four choices, 8 ohm or 16 ohm, 3/8" long shaft or 1" long shaft. The L-pad should be marked on the back as to what the ohm value is. They are most likely 8 ohm.
Good luck.
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Freak out...Far out...In out....
So the diaphragm is bad? I don't see any cracks or damage to it. I don't need a new driver because the coil is open? Since I'm replacing one should I do both? Before the horn went and after I cleaned the L-pads I can see how these speakers can blow away any other speaker. The bass and mid-range was phenomenal! Made my HPM-150's sound muddy. I think this could be my last set of speakers.
The coil is integral to the diaphragm. The diaphragm itself will look fine but there is a break somewhere in the coil winding.
Yes, do replace both. Contact Great Plains and they will help you get the right parts and answer any questions. You could also send them the drivers to be restored. They recharge the magnets and replace the diaphragms.
I'm glad you like the 19's. You got a great price on them.
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Freak out...Far out...In out....
I guess I will start with the L-Pads. Can you suggest a make and item number for those from Parts Express or another electronics store? I have looked at some and have no idea which ones to order. Thanks
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