Martin Logan SL3 = dead => help

[Andersonix]

Originally Posted by peranders

I'll let you know how it went.

Update, P-A?

[peranders]

Still broken but some day very soon I plan to fix this.

[nac134]

I have had a similar problem. It was arcing, but it was happening in the wiring, and not on the actual panel. This will be hapening either between the power supply board and the panels or the transformer and the panels. Keep in mind that very lethal voltages are involved, so be careful. Either buy some rubber gloves, or be sure to keep one hand in your pocket at all times - is when the voltage travels from one hand to the other, ie across you chest, that you can get really hurt.

[JonasKarud]

Originally Posted by peranders

Still broken but some day very soon I plan to fix this.

Per-anders, you must, in the future, consider that the folks on DiyAudio lays down a quite an amount of thinking to solve YOUR problem, and that it's interesting for us to know whether the problem is solved!!

[peranders]

I will notify you when I have fixed the speaker. It's still out of order.

[peranders]

Originally Posted by nac134

I have had a similar problem. It was arcing, but it was happening in the wiring, and not on the actual panel. This will be hapening either between the power supply board and the panels or the transformer and the panels. Keep in mind that very lethal voltages are involved, so be careful. Either buy some rubber gloves, or be sure to keep one hand in your pocket at all times - is when the voltage travels from one hand to the other, ie across you chest, that you can get really hurt.

Have you any personal experience of this, I mean the electrical chock?

[enilsen]

I have had a similar problem with ML speakers and it was due to the strip of aluminum foil along the bottom of the membrane loosing contact with the conductive coating. This is where the static charge is transferred to the membrane.

To test if the static charge is not reaching the membrane you can borrow a static charge from the other panel by using a test wire with a flat metal tip. Be careful not to discharge against the stators. You do this while music is being played through the speakers.

[nac134]

I have actually zapped myself on my electrostats with more than 2000 volts, but only across my hand, never across my chest. Roger sanders, the designer from innersound and the inventor of the curved electrostatic panel told me that a shock from the power supply across the chest could stop your heart (he was helping me when I had an arcing problem). Besides designing speakers, he's also a medical doctor, so I took his advice.

In my case the arcing was happening very close to where the signal wires enter the panel.

[Franz Gysi]

You do this while music is being played through the speakers.

THIS is dangerous, because the signal voltage is at high level and can deliver much more current than the polarizing voltage!!!

Potentially lethal.

Franz

[Steve M]

Originally Posted by enilsen

I have had a similar problem with ML speakers and it was due to the strip of aluminum foil along the bottom of the membrane loosing contact with the conductive coating. This is where the static charge is transferred to the membrane.

To test if the static charge is not reaching the membrane you can borrow a static charge from the other panel by using a test wire with a flat metal tip. Be careful not to discharge against the stators. You do this while music is being played through the speakers.

Sorry to say, but this is really BAD ADVICE! DANGER!! DANGER!! ELECTROCUTION HAZARD!!

The maker of my stat told me quite emphatically do NOT go poking around when the stators are charged and especially when music is playing as there will be up to 6000v there to zap you!