2020年9月29日 · The use of heavier copper is preferred for thermal reasons, but cost and electromagnetic issues must also be considered. It is recommended to use a two-sided board for better heat dissipation and to pay attention to the current distribution in vias.

2013年10月14日 · In addition to what mrBigGuy said, maybe try moving the snubber. From the pictures I think it is connected directly across the DS of the FET. This means the snubber and FET are sharing a return current to the input cap in that heavy wire. There can be ~150A in that wire so even a small ESL there will make a big difference.

2020年4月3日 · The easiest way for me to make a pcb trace carry more current is to simply put solder on the trace with a soldering iron , just make a even nice surface and the trace will become some 2x if not more thicker, if you need serious increase then take a bare copper wire and again solder it on the trace.

2023年11月27日 · We recently ordered a batch of populated PCB. Unfortunately, due to a misunderstanding around the solder mask some gold plated pads that should have been left bare were covered in solder. The PCBs are part of sample holders and the bare pads are used to wire bond (using aluminium wire) to the DUT.

2016年3月24日 · The participants also discussed how copper is commonly used in communication purposes, with frequencies up to 100 GHz. The conversation also mentions that metals can act like dielectrics above the plasma frequency, which is in the PHz range. They also mention that commercial devices above 40 GHz commonly …

2009年2月2日 · A heavy copper pot of mass 2.0 kg (including the copper lid) is at a temperature of 150°C. You pour 0.10 kg of water at 25°C into the pot, then quickly close the lid of the pot so that no steam can escape. Find the final temperature of the pot and its contents, and determine the phase (liquid or gas) of the water.

2010年12月2日 · A vertical, 1.13m length of 18-gauge (diameter of 1.024mm) copper wire has a 200.0N ball hanging from it. What is the wavelength of the third harmonic for this wire? A 1000- ball now replaces the original ball. What is the change in the wavelength of the third harmonic caused by replacing the light ball with the heavy one?

2009年5月6日 · A ballpark figure for a PCB trace is about c/1.5, but it varies a fair amount, based on the dielectric constant of the PCB material forming the stripline. so the number i was given .18ns/inch works out to be about c/2.13, and your number is c/1.5 (.13ns/inch, which is …

2025年1月1日 · This translates to the approximate total of 2.7 thousand solar masses-worth of heavy elements produced and re-seeded into the galactic gas over the time period. The estimated present-day abundance of heavy elements in the Milky Way is on the order of 3 thousand solar masses, which is in broad agreement with the slapdash number we've come up with.

2025年1月12日 · The PCB ground plane is connected to the coaxial outer and forms one conductor of the half wave transmission line. The arms of the dipole are fed with +V and -V, giving a total of 2V. For constant power this gives R proportional to V^2 as …