Test Equipment Anonymous

I'm not familiar with DAB and I don't know what it stands for. I suppose Google will tell me but I'm lazy. :P I'm also not aware of any steps to eliminate VHF FM (88 - 108MHz) and there are still many stations across the band. Even AM broadcast isn't dead although many stations have gone silent ove...

Edited because the original source was deleted, fuckers

Splitting anything across multiple organisations encourages finger pointing and wasteful legal activities. The BBC is definitely under financial pressure now. Some would say it has been for 40 years. Oh absolutely; Thatcher started the squeeze, Major continued it, Bliar didn't really do much to rol...

This popped up in a thread in the other place. Haven't watched it yet myself, but there were plenty of (surprised) positive replies: https://www.youtube.com/watch?v=5PyGwQfdfmQ Some further information: https://www.sciencedirect.com/science/article/pii/S2213158217301225 https://www.nature.com/artic...

With battery backup on my mind recently (planning a dual battery mod for my 3478A's, to enable safe hot-swapping), I decided to have a look at the 4503 schematic, to see if there's any possibility for improvements. There's a few oddities, or bad design choices, depending on your POV. The battery is...

Yeah that's from the early 1990's, earliest. It's for testing the integrity of the various circuits on the arm (position control, a couple of firing circuits for controlled detonation etc); you don't want to be in the middle of prodding at something only to have one of them not work. The LEDs are a...

BU508A wrote: ↑Wed May 06, 2026 2:49 pm It is the current that kills, not the voltage.

I guess it's time to link this video again: https://www.youtube.com/watch?v=BGD-oSwJv3E&t=10s

Yep, I'm aware of that. But lately you guys have had some nasty heat waves which aren't typical for you. I'm not sure what the stats show, but there have always been summers with a week or two when it's been too hot to sleep. I remember 1976. Air conditioning is common in office blocks and similar ...

They're a decent meter. The SRAM battery is very problematic though; I'm contemplating binning off rechargeables on mine (I did do a 2x AAA mod but prolonged lack of use results in cal loss) in favour of hot-swappable lithiums of some sort. EDIT: Oh, btw, if yours has the GPIB, TheHWcave is looking...

I foolishly didn't dig further, figured it was a NiCd and didn't notice until after installing it that it is in fact NiMH. Of course to complicate things, this instrument is from HP's later "no schematics included" generation, so this will be a PITA. (And of course I also have since found...

Not always: take the Tek1502, which uses a PUJT to stuff pulses into the 9-cell NiCd battery. Mean current might be OK, but the crest factor is ridiculous. Even Tek had to issue a note saying "don't charge continuously for more than 16 hours" (and recharge once/month, because even when sw...

I see that EEVBlog post speculates about current limiting being done in software rather than hardware. I've wondered the same, particularly in light of my PSU having OVP and OCP in firmware. It's not speculation, the manual hints at it, and the tech support that they spoke to explicitly stated it t...

AliX fogger?

https://www.aliexpress.com/item/1005006463663595.html

True RMS meters were preferred for THD measurements as they dealt accurately with noise as well as the mainly harmonic residual. Older distortion analysers didn't have them and spent a page in the manual apologising for it. They are used for accurate measurements with all sorts of power electronics...

My free-standing worktop height one uses less than 100W with the compressor motor running. Be careful if you plan to run one on a UPS; the motors don't like modified sine or square waves, they cause too many I 2 R losses and consequently overheat. I'm guessing 1kW is a momentary inrush? Most UPS's/...