Cornan Posted April 10, 2017 Author Share Posted April 10, 2017 8 hours ago, lmitche said: This really depends on the situation. There are times where the shortest cable possible is best. With my lps-1 to Adnaco USB box power, SQ was hugely improved with a 1 inch male to male adapter. I was very surprised. As always it is best to try on your own setup. There is a lot of parameters that could affect the outcome. Have you a short cable between the feeder supply and the LPS-1 as well? If a short DC cable matters between the LPS-1 and the Adnaco USB box power I can imagine the feeder cable matters as well. Link to comment
lmitche Posted April 10, 2017 Share Posted April 10, 2017 No the feeder cable is a long one that feeds two lps-1s. Pareto Audio aka nuckleheadaudio Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 13 hours ago, lmitche said: This really depends on the situation. There are times where the shortest cable possible is best. With my lps-1 to Adnaco USB box power, SQ was hugely improved with a 1 inch male to male adapter. I was very surprised. Agree depends on the situation, i tried many choices and while shorter was better in general I also found out that the quality of the wire and connectors also matter. I tried cheapo adapters, Standard copper, OCC copper and OCC silver with different gauges, everything matters. I finally settled with a 15cm 16AWG OCC pure silver with Oyaide connectors between my LPS-1 and RUR Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 Can someone pls point me to a device that allows me to measure how much DC power (amps or watts) my Brooklyn Dac is drawing from the VR Mini Link to comment
Cornan Posted April 10, 2017 Author Share Posted April 10, 2017 17 minutes ago, moussaobeid said: Can someone pls point me to a device that allows me to measure how much DC power (amps or watts) my Brooklyn Dac is drawing from the VR Mini You can easily do it yourself using this method: The parts is very easy to find. Search for screw terminal DC plugs and mini LED volatage meter. Ps. There are plenty of LED voltage & current meters around as well Ds. mozes 1 Link to comment
Cornan Posted April 10, 2017 Author Share Posted April 10, 2017 Here is some suggestions of parts for a chepeo voltage meter: LED voltage meter: http://www.banggood.com/0_28-Inch-2_5V-30V-Mini-Digital-Voltmeter-p-974258.html?rmmds=detail-left-hotproducts DC2,1/5,5mm screw terminal male & female: http://www.banggood.com/5_52_1mm-DC-Power-Male-Female-Plug-Jack-Adapter-Connector-for-CCTV-LED-5050-3528-5630-Strip-Light-p-1111850.html?rmmds=search If you want a fancy multifunctional LED meter for 2 wires you can use this one: http://www.banggood.com/VAM9020-Multifunctional-Voltage-Current-Power-Tester-Meter-Double-4-bit-LED-Digital-Tube-Display-p-1092603.html?rmmds=search Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 Thanks Cornan I have this one Etekcity Digital Clamp Meter Multimeter AC / DC Voltage Test https://www.amazon.ca/dp/B00NWGZ4XC/ref=cm_sw_r_cp_api_zX56ybEBRVKFV but I am not sure I can use it to measure current draw. Now I use it to measure voltage of power supplies and batteries Link to comment
austinpop Posted April 10, 2017 Share Posted April 10, 2017 As you guys know, I'm not a DIY cable guy, but I do know the science. To measure current, you either put an ammeter in series (it needs to be able to handle the range you care about - in this case, up to 5A DC), or you place a known resistance in series, and measure the voltage across it. Now, assuming your multimeter can handle that range, and since it looks like your probe wires plug into the meter with come kind of jack, what about just building custom cables: DC 5.5.x2.1 barrel female to male (whatever goes into your MM) Male MM jack to DC 5.5x2.1 male Or so goes the theory at least. My Audio Setup Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 3 minutes ago, austinpop said: As you guys know, I'm not a DIY cable guy, but I do know the science. To measure current, you either put an ammeter in series (it needs to be able to handle the range you care about - in this case, up to 5A DC), or you place a known resistance in series, and measure the voltage across it. Now, assuming your multimeter can handle that range, and since it looks like your probe wires plug into the meter with come kind of jack, what about just building custom cables: DC 5.5.x2.1 barrel female to male (whatever goes into your MM) Male MM jack to DC 5.5x2.1 male Or so goes the theory at least. Thanks @austinpop, yes my multimeter can handle the range, it is always good to start with science I think I will build one based on @Cornan image, very neat and handy that I can just plug in anywhere I need it. Link to comment
austinpop Posted April 10, 2017 Share Posted April 10, 2017 2 minutes ago, moussaobeid said: Thanks @austinpop, yes my multimeter can handle the range, it is always good to start with science I think I will build one based on @Cornan image, very neat and handy that I can just plug in anywhere I need it. Go for it. But remember to use a current meter, not a voltage. Although, I still wonder - why not use your existing multimeter? It seems perfectly capable. You just need to adapt the 5.5/2.1 to the multimeter's jacks. Either way - I am curious to know your current measurements once you get it working. My Audio Setup Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 2 minutes ago, austinpop said: It seems perfectly capable. You just need to adapt the 5.5/2.1 to the multimeter's jacks. I can do that but my MM has sharp pins that I want to keep as is. I can simply cut the wires and connect them to a 5.5/2.1 female/male adapter. It is always fun to build something new but I will find a way to measure the current draw before the parts arrive Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 OK I ordered this one as it shows both, voltage and Amps https://www.amazon.ca/dp/B00BYKRETK/ref=pe_386430_126088100_TE_item_image I will figure out the connections later on, this one seems to have more wires than the one @Cornan shared in the image, maybe because it shows amps as well Link to comment
austinpop Posted April 10, 2017 Share Posted April 10, 2017 18 minutes ago, moussaobeid said: OK I ordered this one as it shows both, voltage and Amps https://www.amazon.ca/dp/B00BYKRETK/ref=pe_386430_126088100_TE_item_image I will figure out the connections later on, this one seems to have more wires than the one @Cornan shared in the image, maybe because it shows amps as well Coincidentally, I ordered this today too: https://www.amazon.com/gp/product/B00J3JSEG6 My Audio Setup Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 12 minutes ago, austinpop said: Coincidentally, I ordered this today too: https://www.amazon.com/gp/product/B00J3JSEG6 This is cool, convienent for USB! I need one too, will order it as well Link to comment
austinpop Posted April 10, 2017 Share Posted April 10, 2017 Yes indeed, the combo provides some interesting experiments: current draw of Brooklyn from VR Mini current draw of RUR current draw from RUR to Brooklyn on USB Therefore, 3 minus 2 = current draw of RUR internals current draw of tX-USBultra Then 5 minus 3 = current draw of tX internals Can't wait for your numbers! My Audio Setup Link to comment
lmitche Posted April 10, 2017 Share Posted April 10, 2017 You can probably get this one today: http://www.homedepot.com/p/Klein-Tools-Manual-Ranging-Digital-Multimeter-MM300/206517192 mozes 1 Pareto Audio aka nuckleheadaudio Link to comment
austinpop Posted April 10, 2017 Share Posted April 10, 2017 Just now, lmitche said: You can probably get this one today: http://www.homedepot.com/p/Klein-Tools-Manual-Ranging-Digital-Multimeter-MM300/206517192 Larry - the question isn't the multimeter (already have one), but the cables/adapters needed to get it in series to measure current. My Audio Setup Link to comment
lmitche Posted April 10, 2017 Share Posted April 10, 2017 3 minutes ago, austinpop said: Larry - the question isn't the multimeter (already have one), but the cables/adapters needed to get it in series to measure current. Sorry, missed that. I can't help you there. Pareto Audio aka nuckleheadaudio Link to comment
Cornan Posted April 10, 2017 Author Share Posted April 10, 2017 Here is how to make a cable that works with a multimeter: Using screw terminal DC plugs & socket and a chepeo probe with crocodile clips will make it easy to make. mozes 1 Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 46 minutes ago, austinpop said: Yes indeed, the combo provides some interesting experiments: current draw of Brooklyn from VR Mini current draw of RUR current draw from RUR to Brooklyn on USB Therefore, 3 minus 2 = current draw of RUR internals current draw of tX-USBultra Then 5 minus 3 = current draw of tX internals Can't wait for your numbers! Great thanks for this, I will be measuring all of the above and reporting the results soon Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 51 minutes ago, lmitche said: Sorry, missed that. I can't help you there. Thanks for help anyway, will sort out the wire issue soon Link to comment
mozes Posted April 10, 2017 Share Posted April 10, 2017 38 minutes ago, Cornan said: Here is how to make a cable that works with a multimeter: Using screw terminal DC plugs & socket and a chepeo probe with crocodile clips will make it easy to make. Amazing stuff Cornan! you can easily pull out any trick anytime you just gave me an idea! Link to comment
Ralf11 Posted April 10, 2017 Share Posted April 10, 2017 another technique for measuring current http://inspectapedia.com/electric/Amps_Measurement.php Link to comment
Cornan Posted April 10, 2017 Author Share Posted April 10, 2017 1 hour ago, moussaobeid said: Amazing stuff Cornan! you can easily pull out any trick anytime you just gave me an idea! Thanks Moussa! ? Do not forget to share that idea. I've got a curious mind! ? Link to comment
mozes Posted April 11, 2017 Share Posted April 11, 2017 @Cornan Maybe a stupid question, but can you ground a device from two different places like chassis and RCA? Link to comment
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