Hello all
Comments
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Oh, but I glued the first one without seeing the polarity was wrong, they have the little red dot on the positive side, so I clipped off the connectors on the wires, and reversed them. So now on that one the smaller terminal is positive.
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That was @VSAT88's thread. Good work, because thats the only one I haven't modded because I Karma'd off a perfectly good set here from the custom 8Tls.
I saw @DarkKnight's thread pics where it looks like the circular plastic and silk dome can drop right in as well.Don't take experimental gene therapies from known eugenicists. -
Yep, the plastic baseplate is beveled, but there is a gap between the edge of the silk and the bevel, and you cant really see it very well when its covered in glue. I found it easier to flip them over and line them up upside down. Dang, now I wish I took pictures. I will pop one apart and take a few, as it may help someone else, as you fine folks helped me.
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The black plate with the terminals has a little residual glue on it from the factory, but it pops off with minimal effort. I got some on there as well so I better not pop it back off, as its lined up nicely now.lining it up on the plate is tricky with contact cement, I just stuck one tiny section of it down and flipped it over and adjusted to the center.
As you can see the fluid in them is brown, not sure how bad that is, not real sure what color it's supposed to be. A voice coil did burn up in there, so it's probably not ideal.
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Can you post in Vsat88's thread so all the tweeter rebuild info is there? Thanks for sharing and welcome aboard.Don't take experimental gene therapies from known eugenicists.
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Ferrofluid is a dark brown color with a fluid viscosity. Over time the viscosity can thicken causing it to become ineffective. If yours has turned to sludge it must be changed.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Ah thanks. Ok I will order some fluid, and give that a go. Not real sure how to get it out of there, or how much to put back in.
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There is online info and videos showing what to do. Parts Express sells the fluid.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Ok yes, I watched a video on it. And found this kit. I wonder if I will need 2 of them.
https://www.ebay.com/itm/Ferrofluid-100uL-Repair-Kit-for-1-Diameter-Voice-Coil-Tweeter-or-Horn-Driver-/131096038707?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0 -
Notenoughtaco wrote: »Oh, but I glued the first one without seeing the polarity was wrong, they have the little red dot on the positive side, so I clipped off the connectors on the wires, and reversed them. So now on that one the smaller terminal is positive.
Welcome!
I'm not understanding how it could be possible to get the polarity wrong. I mean yeah, I see how you could have the positive on the left or right, depending upon how you orient the voice coil/dome/terminal assy relative to the plastic tweeter bezel but it seems to me the polarity should be foolproof because of the different size fastons.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Yep, I glued the coil down with the negative wire going towards the positive, larger terminal. So I just went with cutting the ends off the wires coming from the box and switching them around.
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Oh I see thanks.
You got the glue down surround types without any terminals and re-used the Polk terminals. Or maybe I'm confused and they are all like that.....I've been following this mod or at least I though so.....back to the original thread for me to reacquaint myself I guess. George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Yep, they are all like that, well, for sl2500s anyways, as far as I could find.
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Notenoughtaco wrote: »Ok yes, I watched a video on it. And found this kit. I wonder if I will need 2 of them.
https://www.ebay.com/itm/Ferrofluid-100uL-Repair-Kit-for-1-Diameter-Voice-Coil-Tweeter-or-Horn-Driver-/131096038707?mkcid=16&mkevt=1&_trksid=p2349624.m46890.l49286&mkrid=711-127632-2357-0
Yeah, duh!Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Our ferrofluid kits come with pre-measured packets of ferrofluid which are used to replace the old fluid in speaker air gaps when replacing diaphragm and coil assemblies.
Ferrofluid improves the performance of high frequency and midrange drivers. It works by damping the impedance at resonance to effectively lower distortion, smooth frequency response, and increase thermal power handling.
Ferrofluid improves the performance of high frequency and midrange drivers. It works by damping the impedance at resonance to effectively lower distortion, smooth frequency response, and increase thermal power handling. It should be used to replenish drivers treated previously with ferrofluid. With care, it can also upgrade most drivers that have never contained ferrofluid. The kits listed are approximate fill quantities relative to approximate voice coil diameters. In general, the air gap should be 75% filled prior to inserting a voice coil diaphragm assembly. The kit contains synthetic ester-based ferrofluids and in most cases should not pose any adhesive incompatibility. It is recommended that this is confirmed by contacting the driver manufacturer prior to usage. Adding ferrofluid to a driver not intended for it will, in most cases, void the original manufacturer's warranty. Included in kit: A ferrofluid packet, absorbent paper strips for removing old ferrofluid, detailed instructions, and material safety data sheet.
If we knew the magnet and pole piece dimensions it could be calculated. You could measure the gap and dia. of the gap and depth of gap and get a pretty good idea. What is unknown is the I.D. of the magnet though.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
Ah ok, yeah I didn't read all that initially. The video I watched the guy didn't need but what looked like half the packet is why I asked.
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Are you guys sure he should even put ferrofluid in since the Wuhans are Kapton formers?Don't take experimental gene therapies from known eugenicists.
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Me? Nope I'm not sure at all!
Maybe we need to consult The Tale of 5 Tweeters author @DarqueKnight George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
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Notenoughtaco wrote: »Ah ok, yeah I didn't read all that initially. The video I watched the guy didn't need but what looked like half the packet is why I asked.
This isn't rocket science. You have a one inch tweeter, so you buy the version for a one tweeter. Fill up the cavity to about 75% full and throw the rest of the tube away. Repeat for the other tweeter.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
Ferrofluid also helps to prevent coil burnouts. Unfortunately, as it ages, it tends to dampen too much.Gustard X26 Pro DAC
Belles 21A Pre modded with Mundorf Supreme caps
B&K M200 Sonata monoblocks refreshed and upgraded
Polk SDA 1C's modded / 1000Va Dreadnaught
Wireworld Silver Eclipse IC's and speaker cables
Harman Kardon T65C w/Grado Gold. (Don't laugh. It sounds great!)
There is about a 5% genetic difference between apes and men …but that difference is the difference between throwing your own poo when you are annoyed …and Einstein, Shakespeare and Miss January. by Dr. Sardonicus -
I got it don't think I deserved some childish "duh" comment. Thanks.
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Have another taco.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I will, bet you haven't seen one in a while.
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Notenoughtaco wrote: »I will, bet you haven't seen one in a while.
Can't stand Mexican food.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I'm thinking a syringe and hypodermic needle may be helpful. Use whatever is the approved method for cleaning all the old stuff out and then fill it all the way up with the hypo/needle and then, since you know how much you put in, withdraw 25% of that and you should be in the ballpark.George / NJ
Polk 7B main speakers, std. mods+ (1979, orig owner)
Martin Logan Dynamo sub w/6ft 14awg Power Cord
Onkyo A-8017 integrated
Logitech Squeezebox Touch Streamer w/EDO applet
iFi nano iDSD DAC
iPurifier3
iDefender w/ iPower PS
Custom Steve Wilson 1m UPOCC Interconnect
iFi Mercury 0.5m OFHC continuous cast copper USB cable
Custom Ribbon Speaker Cables, 5ft long, 4N Copper, 14awg, ultra low inductance
Custom Vibration Isolation Speaker Stands and Sub Platform -
I've seen folks use a paper towel to soak it up out of the channel. If you're really industrious maybe an air compressor out side to blow it out. Wipe off and refill.
