Hi,
just wanted to share a very simple test I made to check the quality of some new wires I just received. The wires were bought from intl-outdoor and from two different sellers on aliexpress.
For comparison, pure copper resistivity is 1,68*10^ā8 ohm*m (of course, my calculations assume the overall wire cross-section is exactly the nominal oneā¦ which is probably far from exact)
The test has been made measuring the voltage drop @5A. Of course the voltage measurement points were independent (the voltage clips and the power supply clips were not touching each other). For the smaller wires you have to be quick reading the voltage drop because it rises quickly because of the Joule effect.
Basicallyā¦ Iāll keep buying the wires wherever itās cheaper donāt get me wrong, intl-outdoor itās probably one of the best shops around for flashlight, itās just that from my (limited) experience itās not worth if all you need are cablesā¦ especially if you donāt mind measuring the resistance to check what you get on aliexpress is good (there is definitely consistency in the quality of what you buy from renowned shops such as intl-outdoor, not necessarily so on random aliexpress shops). After all, itās quite normal that prices canāt compete if you consider the numbers we are talking aboutā¦ the meters of cables sold to flashlight enthusiasts are risible compared to the amount sold for other electric use, especially if wholesale.
An outrageous power system under the hood.
I know I never thought about it before, but if you have a tens of thousands of watts in a car audio system, you are NOT going to get that kind of sustained power out of a single car battery or charging system.
You NEED multiple batteries AND alternators! Not just multiple amps and speakers.
Even though I am not into extreme car audio, lately I have been having alot of fun watching YouTube videos of the builds.
Look at all that heavy gauge silicone wire.
This guyās channel is very entertaining
I need some more silicone wire.
In the first post I saw $0.26/m in AWG20ā¦which is way lower than what I see. Even in 300m rolls.
fedcas, could you share the links to those wires?
Thanks. Itās much more expensive in those shops nowā¦.but the results enabled me to refine my searches. Now I see 20 AWG for $0.28. The key seems to seek ā20 3mā instead of ā20awgā, āawg20ā, ā10mā and some other variants. Somehow 2 x 3m is just much cheaper (per m) than 2 x 10mā¦
ADDED:
Though most wires found this way are not of the highly-flexible type.