"Most" won't cut it for my typical designs.
The little tube is also against contamination such as dust accumulation. For example, inside a PC a non-covered solution would likely fail within less than five years. Much less if you have dogs.
Wouldn't be such a big deal. As a teenager I built a ham radio power amp where the reverse voltage of the rectifier is around 8kV. It wasn't a big deal, I could buy the diodes on the Dortmund (Germany) December hamfest. One the amp before that I used a 1kV diode stack and bleeders. Neither was a significant cost factor.
Voltage Multipliers Inc.
They make an "integrated" C-W stack, diodes and caps. But the cap values are really small and the price in insane. So I did make my own.
I just thought it was interesting that somebody sells a smallish potted coupler rated for 50KV.
And pretty fast, they have to do 6mbps.
Change your supplier then:
Best regards, Piotr
On a sunny day (Fri, 30 Jan 2015 09:19:45 -0800) it happened Joerg wrote in :
duh:
There are cheap photodiodes intended for TV remote receivers. The black plastic is a modest IR bandpass filter. There are matching IR LEDs.
A diode laser that only lasts 1k hours has been horribly mistreated. Derate it a bit, protect it from ESD, and keep it clean and running below 35C. It ought to go 100k with no problems.
A barefoot diode laser sends a beam out into roughly a 10 degree cone in one axis and 40 degrees in the other, depending on the stripe dimensions, so it isn't too hard to aim roughly.
Cheers
Phil Hobbs
Maybe for hobby. If it's not available from mainstream suppliers where I can be sure to obtain original mfg parts it will not go into any of my designs.
Right. I'll tell my clients "Oh, just get it off of Ebay".
It works, mostly. But for serious industrial purposes it's iffy.
Den fredag den 30. januar 2015 kl. 18.33.16 UTC+1 skrev John Larkin:
or IrDa trancievers, come in SMD both side and top view, the fast ones are 4Mbit
-Lasse
On a sunny day (Fri, 30 Jan 2015 09:27:59 -0800) it happened John Larkin wrote in :
Still working great right now.
Yes 50 kV is a lot, for high power I would stay clear of it. Flash over, creep, moisture...
On a sunny day (Fri, 30 Jan 2015 11:04:45 -0800) it happened Joerg wrote in :
You know, sometime ago there was a discussion with radio-hams on some sailing forum. one other (not licensed) guy had a Baofeng porto to call aircraft emergency channels in the middle of the ocean if he was in danger.
The consensus was, among EVERYBODY: It is better to be saved by doing an illagal transmission, than to die by staying q00% legal.
You talk medical... It is better to be saved by some ebay part, than to die from a missing part from digikey.
The whole world buys ebay these days, it is NOT just for ??whatever your concept is??? No, probably the whole US army would fall apart without ebay. LOL
On a sunny day (Fri, 30 Jan 2015 09:33:10 -0800) it happened John Larkin wrote in :
I have such a module from Philips, 5 V DC power and digital out, in an alu can. Preamp and stuff is in it, IR filter at front.
What, are you upset by very loud noises?
Joerg,
this may be better:
That's the problem with search engines. By specifying 'TOSLink' you only get the two suppliers' products who licensed that as their trademark for the joint venture. Toshiba and Sony...
Sharp might be the vendor you want, but I'm not sure who stocks 'em
On a sunny day (Fri, 30 Jan 2015 12:54:12 -0800) it happened John Larkin wrote in :
We had a HV test room where I worked. One demo was to fill a milk bottle half way with water (so half full = half empty, and as you know multiply both sides by 2 and that proves full is empty..), but anyways turn on the HV slowly and it was supposed to crack exactly at the fluid level. The HV cage was protected by an interlock, 100kV or so, huge transformers and oil capacitors. It made some noise, but not as much as lighting hittind in front of you, I have seen that too, right on the barrier next to a bridge I was waiting for. At new years eve I had the amp at 70% at exactly 0 hours, made more noise than the fireworks... Safer too.
...
the ebay vendor is, or is buying from, buying from the maker who sells it wholesale on alibaba.
I say a movie once, made in the Los Angeles power company test yard, where they tested breakers and transformers and stuff. It looked like the titles background in Apocalypse Now.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required