Rare Opportunity - Acoustat Model 6 - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 23rd November 2012, 12:02 AM   #21
diyAudio Member
 
DeltaStar's Avatar
 
Join Date: Mar 2012
Location: Handel SK
Wow, sure glad my 2+2's are still clean after 30 yrs, that bathtub thing scare's me a little
Not sure but when one upgrades do the 2 yellow and blue caps get replaced? in the last pic of the interface? Thanks Al

Last edited by DeltaStar; 23rd November 2012 at 12:07 AM. Reason: add more
  Reply With Quote
Old 23rd November 2012, 12:06 AM   #22
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
Quote:
Originally Posted by tyu View Post
I have had Acoustats for 35 years....i think that the panels have dust in them an this is what is poping ...it leting high V leek off ....In Shiping some dust moved around...
{So the Heat gun is last thing i would do!}...
Dunno why this wasn't mentioned earlier, its like a bug zapper! oorrrr, a HV cap on the back top of a CRT picture tube arcing out.

Where did you purchase these speakers if I may be so bold as to ask?

Last edited by freax; 23rd November 2012 at 12:09 AM.
  Reply With Quote
Old 23rd November 2012, 12:53 AM   #23
diyAudio Member
 
Join Date: Dec 2007
I thought I mentioned in my early post.

I purchased these speakers from USA and shipped to me by sea.
  Reply With Quote
Old 23rd November 2012, 05:55 AM   #24
diyAudio Member
 
Join Date: Feb 2009
My advice: a thorough front and back vacuuming would be your first order of business. Just be gentle, you're trying to remove dust, not the stators or membrane.

This will require removing the socks, which is a tedious chore, but not particularly difficult. It's really just a matter of removing a zillion staples. (I think the Model 6 covers are secured in the same fashion as the 2+2.) I would then either wash the socks (I washed my 2+2 covers in the washing machine with no ill effects) or replace them with a more acoustically transparent material. I replaced my 2+2 socks with Spandex stretched 2X; I got clearer highs, and couldn't tell the difference compared to naked panels, while the stock material dulled the presentation somewhat. Everyone who has seen them both preferred them to stock, visually. And you have many colors to chose from, even patterns if you like.

Once nude, try to listen and hopefully locate the pops. Use a flashlight to see if anything looks amiss, but I would guess a good vacuum job should dislodge any debris.

At the least, inspect the frames for problems and check that all screws holding the panels are properly secured.

tyu makes a good point about washing the panels in water. Jim Strickland (founder of Acoustat) said it was perfectly fine to wash the panels with water, I think he might have even said you could wash them in the shower. Probably best to rinse with distilled water, though. Being vacuumed and washed would almost certainly clear up any clag causing arcing.

Acoustat used heat guns to tension the panels when they were built, and periodically the panels can be re-tensioned with a heat gun, although it can all end in tears if you aren't careful. I melted a hole in one, but fortunately I had extras. But I successfully re-tensioned about half a dozen panels and the bass and overall presentation tightened up, so to speak, and a couple of them stopped popping. I do have some panels that AFAIK have never been re-tensioned which are all fine (and older than your panels) so hopefully you're OK there. This only need be done on one side. Look for crinkles in the clear Mylar around the perimeters, and they tend to show up in the corners.

If these speakers float your boat, it's worth putting some time and money into revitalizing these speakers. That includes transformer interfaces, as well. This should all improve the reliability and will definitely will improve the performance. They're not for everyone, but the big Acoustats can be pure magic.

Good luck!
  Reply With Quote
Old 23rd November 2012, 09:25 AM   #25
diyAudio Member
 
Join Date: Dec 2007
Thanks for all your help!

I did the vacuuming part and it help a lot. The popping noise is still there once in a while, but much less frequent. I don't think I need to use the heat gun fix just now.

I have also checked the HV and it looks clean as normal.

I put on Max Bass CD and run for a few rounds to get rid of some dust during the shipping.
  Reply With Quote
Old 23rd November 2012, 10:57 AM   #26
tyu is offline tyu  United States
diyAudio Member
 
Join Date: Jul 2009
The poping you have is a leak of High V...from the ..5k bias..[.The poping can be coming from the 121 interfaces on the Mixer board]...before you pull the dress off...... dust....it looks lite black an bilds up on the wire at the Mixer doard.. i take a paint brush 3-6"wide an just brus away the dust on the mix board...a hair can case this poping-leaking.... I do this just to be safe....you cant even see it some times...
You do have 4ea 121 interfaces in your setup.. most have only two....
All the panels are the same some have 3 wire so have 5....some bias wire on the panels are yelow-red stripe....other have all white...goodluck
  Reply With Quote
Old 23rd November 2012, 11:39 AM   #27
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
Quote:
Originally Posted by audioboat View Post
I thought I mentioned in my early post.

I purchased these speakers from USA and shipped to me by sea.

Yeah... that narrows it down.
  Reply With Quote
Old 23rd November 2012, 10:09 PM   #28
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Sometimes the wires on the grid have come loose.

That will reduce the distance to the diaphragm and cause arcs or rattling. You can spot the wires if you look closely. More often than not this happens at the ends of the cells...

One might be able to reglue them with a combination of nylon fishing line or nylon thread to pull the wire into place, and [U]styrene glue[U]. Styrene glue is simply styrene plastic (clear in most cases - has no filler or colorant so won't be conductive) dissolved in a solvent. The "slow" solvent glue that works on acrylic and styrene plastics will do a good job if you make ur own. You might be able to use "coil dope" which is often a styrene in solvent material.

If you do this, you would have to work on your back with the cells held above you to prevent drips onto the diaphragm... PROTECT YOUR EYES!!! You definitely do NOT WANT styrene + solvent in your eyes!

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 24th November 2012, 02:19 AM   #29
diyAudio Member
 
Join Date: Dec 2007
I have taken the socks off and vacuum the panels front and back. It helps a bit, but the popping still there. You can see the acring when all the lights off. It happens to the top right and left panels, but not the middle one.

I cleaned the panel a little bit without having them in the bath tub.

I could not see any lose wires at the time, however I'll double check again later.

I think the panel may need the heat gun fix, but don't want to burn a hole onto it since I do not have even one spare panel.
I just don't know what temperature the film can sustain? Can other member provide some help here?
  Reply With Quote
Old 24th November 2012, 02:28 AM   #30
diyAudio Member
 
Join Date: Dec 2007
If I shake the speaker a bit, the pop will ocur once on one panel.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Acoustat Model 3 Questions john65b Planars & Exotics 61 9th August 2012 11:36 AM
Need help with Acoustat Model 4 speakers skykomish Planars & Exotics 13 3rd January 2011 10:15 PM
Rare Opportunity: Reference 3A MM da Capo drivers and single system ungie Swap Meet 8 20th December 2009 08:37 PM
FS: Mint pair VOLT BM2500.4--very rare opportunity ludcam Swap Meet 1 17th March 2009 06:51 PM
Acoustat model 141-C speakers available timbuckstwo Swap Meet 1 5th December 2005 07:31 AM


New To Site? Need Help?

All times are GMT. The time now is 11:33 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2