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Author Topic: EV Eliminator ii Crossover Issues  (Read 3295 times)

Dave Rogue

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Re: EV Eliminator ii Crossover Issues
« Reply #20 on: September 28, 2018, 08:27:59 pm »

I reconnected to crossover and jumped the resettable fuse/polyswitch and the horn still didn't work. As previously mentioned, I've tried the horn in both speaker cabs and it works in one, but not in the cab with the crossover in question. I was really hoping that would isolate the polyswitch as the problem. Oh well. At minimum I'd have to remove the power resistor to get to the polyswitch solder joints anyway, so I guess I'll remove the reisistor, capacitor, and polyswitch and test their values with my multimeter.
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Rob Spence

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Re: EV Eliminator ii Crossover Issues
« Reply #21 on: September 28, 2018, 09:48:40 pm »

I reconnected to crossover and jumped the resettable fuse/polyswitch and the horn still didn't work. As previously mentioned, I've tried the horn in both speaker cabs and it works in one, but not in the cab with the crossover in question. I was really hoping that would isolate the polyswitch as the problem. Oh well. At minimum I'd have to remove the power resistor to get to the polyswitch solder joints anyway, so I guess I'll remove the reisistor, capacitor, and polyswitch and test their values with my multimeter.

You donít have to remove them, just on lead on each. Makes it easier to put back if good.


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Dave Rogue

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Re: EV Eliminator ii Crossover Issues
« Reply #22 on: September 28, 2018, 10:39:59 pm »

You donít have to remove them, just on lead on each. Makes it easier to put back if good.


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Thanks Rob! I had been told about only lifting one lead, but I figured I'd go for the gusto, thinking that the resistor, cap, and polyswitch probably all need to be replaced. Well, chalk it up as part of my learning experience, as it looks like all 3 components may be okay.

Not that I wasn't already at a loss, but the 20w 10 ohm resister read 10.3 ohm, which I would think is within tolerance. The capacitor read 1.24 microFarad, which I also think is in spec, and I didn't really know what to do with the polyswitch, other to check for continuity, and megged out at 0.4 ohm, which would make me think it's okay too.

The board doesn't really show any easily traced traces, at least that I can see, so I don't know what to do there, as I suspect there might be an open or bad bad connection somewhere, and there's still the 2 inductors, but I'm pretty sure you guys figured those are for the two woofers (a wiring diagram sure would be nice!).

Here are some pictures from my readings. Any other suggestions, or should I send it off to a pro? I just hate thinking about spending the estimated $40.00 - $70.00 for someone to replace a few bucks in parts, but there is definitely a value to the expertise they posses that I do not.

Pics of readings
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Paul G. OBrien

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Re: EV Eliminator ii Crossover Issues
« Reply #23 on: September 28, 2018, 10:47:05 pm »

Time to fully disassemble that cab I think, maybe there is something else patched into the wires going to the CD that you can't see. These wires should be a dead short measured end to end of course.
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Dave Rogue

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Re: EV Eliminator ii Crossover Issues
« Reply #24 on: September 28, 2018, 11:06:47 pm »

Time to fully disassemble that cab I think, maybe there is something else patched into the wires going to the CD that you can't see. These wires should be a dead short measured end to end of course.

I'm not sure I follow you, Paul. The crossover has all of the speaker wires connected to it, and both woofers worked perfectly, and it sounds like there is a very faint sound coming out of the horn. The original horn that was in that cab had the diaphragm replaced, and is now in the other cab working perfectly. The horn that was in the good cab worked fine before I took it out, and for good measure I hooked it up to some speaker wire connected to my garage stereo and it works fine.

So yes, I guess I will test each speaker wire individually and see what I can find. However, a visual inspection, and feeling for any kinks in the wire, all seem okay. If everything test out okay, and I can't see anything funky on the circuit board, maybe for funsies I'll put the parts back on the board and see if maybe there was a bad solder joint on one of 3 parts.
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David Morison

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Re: EV Eliminator ii Crossover Issues
« Reply #25 on: September 29, 2018, 02:32:44 pm »

I'm not sure I follow you, Paul. The crossover has all of the speaker wires connected to it, and both woofers worked perfectly, and it sounds like there is a very faint sound coming out of the horn.

He means the fault could be in the wiring (inc its joints) from the crossover to the HF driver, ie after the crossover - hence your testing to date not showing anything obvious.
For example, if that wire was secured against vibration by attaching it to a brace somewhere between the crossover and driver, perhaps the method of retention has created wear on the insulation to the point of creating a near-short circuit that you might not have seen yet.
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Ike Zimbel

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Re: EV Eliminator ii Crossover Issues
« Reply #26 on: September 29, 2018, 06:12:48 pm »

He means the fault could be in the wiring (inc its joints) from the crossover to the HF driver, ie after the crossover - hence your testing to date not showing anything obvious.
For example, if that wire was secured against vibration by attaching it to a brace somewhere between the crossover and driver, perhaps the method of retention has created wear on the insulation to the point of creating a near-short circuit that you might not have seen yet.
Yes, or if there are crimped connections on the driver end, those can go bad. When you eliminate all of the smart things, it's going to turn out to be something stupid! :-[
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Dave Rogue

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Re: EV Eliminator ii Crossover Issues
« Reply #27 on: September 29, 2018, 06:57:02 pm »

Yes, or if there are crimped connections on the driver end, those can go bad. When you eliminate all of the smart things, it's going to turn out to be something stupid! :-[

Yes, I agree. I'm thinking (hoping) that when I put it all back together that it's going to work, but probably not. I did check each wire, and they did test okay, but I will look at the crimps if if doesn't work. At this point I fear that the problem is with the PCB, and there's nothing I can do to fix it. We'll see when I button her all back up.
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Scott Holtzman

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Re: EV Eliminator ii Crossover Issues
« Reply #28 on: September 29, 2018, 07:05:28 pm »

Sure you can fix the pcb with a wire.  Should be simple enough to follow traces,

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Mike Caldwell

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Re: EV Eliminator ii Crossover Issues
« Reply #29 on: September 29, 2018, 07:20:50 pm »

Sure you can fix the pcb with a wire.  Should be simple enough to follow traces,

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Yep, if it is a cracked PCB those big wide traces would be easy to bridge the crack with a piece of wire. You do need to clean off the green varnish coating to get some clean copper to solder to.

I just fixed a cracked PCB in a keyboard a couple weeks ago, those traces were not nearly as big as those on your crossover!


Have you tried swapping drivers with your working speaker.
Sorry if you did that already and I missed reading it.

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Re: EV Eliminator ii Crossover Issues
¬ę Reply #29 on: September 29, 2018, 07:20:50 pm ¬Ľ


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