Hi guys, first post here. I'm quite into audio, but I'm not so educated on the electronics of it (which is arguably everything). I might be asking a naive question, but figured I'd ask anyway.
I've started taking a closer look at the crossovers in my Cheviots, with the intention of upgrading the capacitors, and ensuring that everything is measuring okay.
I've taken my multimeter to it, and it looks like the resistors are all measuring okay (within 1% - 5% of rated resistance). I don't have a capacitance tester to test the capacitors, but I figure I'll see what other capacitors have to offer in terms of sound changes (following some recommendations for caps from another forum).
I've heard it's advisable to open up and clean the rotary switches on these as well. I'm not particularly keen on opening these switches up myself as it looks like it may be a bit too fiddly for me. I'd rather remove them entirely and hard wire the desired settings than opening up the switches I think, but even more so than that, I'd rather leave them be entirely if they're okay.
I've taken my multimeter to the soldering points of these switches to see how they're measuring up. The 'connected' switches read 0 ohms, which is all and well.
However, some of the 'unconnected' switches are reading quite close to 0. Again, I don't have a very strong understanding of electronics so my concerns may be unfounded, but my expectation for these unconnected switches was that they would either read as not having any continuity, or having a fairly high resistance.
Firstly, here are how the switches were set when I took the readings:
And here are the results, overlaid on the schematic.
As you can see, some of the readings for the unconnected switches are as low as 0.2Ω. My question is, given this schematic, are these values expected? Or am I potentially looking at a bad rotary switch(s) on my crossover?
Hope that makes sense. Any help would be much appreciated. Thanks!
I've started taking a closer look at the crossovers in my Cheviots, with the intention of upgrading the capacitors, and ensuring that everything is measuring okay.
I've taken my multimeter to it, and it looks like the resistors are all measuring okay (within 1% - 5% of rated resistance). I don't have a capacitance tester to test the capacitors, but I figure I'll see what other capacitors have to offer in terms of sound changes (following some recommendations for caps from another forum).
I've heard it's advisable to open up and clean the rotary switches on these as well. I'm not particularly keen on opening these switches up myself as it looks like it may be a bit too fiddly for me. I'd rather remove them entirely and hard wire the desired settings than opening up the switches I think, but even more so than that, I'd rather leave them be entirely if they're okay.
I've taken my multimeter to the soldering points of these switches to see how they're measuring up. The 'connected' switches read 0 ohms, which is all and well.
However, some of the 'unconnected' switches are reading quite close to 0. Again, I don't have a very strong understanding of electronics so my concerns may be unfounded, but my expectation for these unconnected switches was that they would either read as not having any continuity, or having a fairly high resistance.
Firstly, here are how the switches were set when I took the readings:
And here are the results, overlaid on the schematic.
As you can see, some of the readings for the unconnected switches are as low as 0.2Ω. My question is, given this schematic, are these values expected? Or am I potentially looking at a bad rotary switch(s) on my crossover?
Hope that makes sense. Any help would be much appreciated. Thanks!
Assuming you are measuring the switch in-circuit: yes such values are to be expected. The contacts are connected by some of the windings of the autotransformer on the left. The resistance of these windings shows up on the measurement.
Measuring the resistance of components in-circuit can give unexpected results, as you are not measuring the component itself. You are measuring the circuit around it in parallel with the component.
Measuring the resistance of components in-circuit can give unexpected results, as you are not measuring the component itself. You are measuring the circuit around it in parallel with the component.
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