Usage, implementation, and other details. I heard a manufacturer once put out a textbook and that was the de facto resource for them but I can't be sure.
Why not straight from the horses mouth
[url]https://archive.org/stream/bstj2-4-31#page/n0/mode/1up[/url]
NICE
thanks
What are you planning on using the tubes for?
I'd like to try and make a basic amplifier, I had some nixies in college so my group made a gps clock, so I used vacuum tubes before and it was a fun project.
There are tons of old books and magazines on tubes and tube circuits.
[url]http://www.americanradiohistory.com/Radio_Electronics%20_Master_Page.htm[/url]
[url]https://archive.org/search.php?query=%28collection%3A73-magazine%20OR%20mediatype%3A73-magazine%29%20AND%20-mediatype%3Acollection&sort=-date&page=11[/url]
[url]https://archive.org/details/BasicElectronicsVolumes151955[/url]
Also for experimenting you don't need high voltage, most tubes give reasonable emission on 12-24V.
[QUOTE=POLOPOZOZO;49400200]I'd like to try and make a basic amplifier, I had some nixies in college so my group made a gps clock, so I used vacuum tubes before and it was a fun project.[/QUOTE]
Oh, neat. Tons of designs for that stuff out there. Some only require a single tube, others double. I'd be interested to see what you come up with.
Here's a nice equivalent to [URL="http://www.drtube.com/en/library/tube-datasheets"]AllDatasheet for Tubes[/URL].
Also I stumbled upon this, a [URL="http://webpages.charter.net/dawill/tmoranwms/Elec_Compound2.html"]Class D Tube Amp[/URL] that works fairly well with an interesting tube-based PWM generator.
And he tests 175V tubes on a breadboard... :what:
[QUOTE=LoneWolf_Recon;49400642]a [URL="http://webpages.charter.net/dawill/tmoranwms/Elec_Compound2.html"]Class D Tube Amp[/URL] that works fairly well with an interesting tube-based PWM generator.
And he tests 175V tubes on a breadboard... :what:[/QUOTE]
I'm not sure whenever he's a overlooked genius, or simply a madman.
I really like the look of the Bravo Audio v2 headphone amp
[t]http://www.parts-express.com/Data/Default/Images/Catalog/Original/310-350_HR_0.jpg[/t]
its so cute and the pcb design is so satisfyingly small. plus 12au7 tubes are the neatest
^you can tell the tube runs ice cold
also wow the high level theory of operation for a diode or triode is way simpler than than semiconductor devices
[QUOTE=POLOPOZOZO;49400974]^you can tell the tube runs ice cold
also wow the high level theory of operation for a diode or triode is way simpler than than semiconductor devices[/QUOTE]
Mostly I think its the interactions with matter that makes semiconductor physics harder than tubes considering all the different doping ratios/carrier mobilities etc. Tubes (save for cold cathodes) are always just constant vacuums thus idealized electron mobility.
[QUOTE=POLOPOZOZO;49400974]^you can tell the tube runs ice cold
also wow the high level theory of operation for a diode or triode is way simpler than than semiconductor devices[/QUOTE]
You joke about this but the chinese knockoff's do run ice cold. Because the tube is for decoration only, it lights up but its not even wired into any of the circuitry at all. Comes with a blue LED though! Someone did a review of the models and found that L/R was often reversed, tapping them caused a metallic screeching and ringing (somehow the tube could still resonate through the audio parts), and they were not so much audio amps as white-noise machines.
This may be a bit macabre, but I've been dying to ask. What is the worse electric shock any of you guys have had?
I licked a battery once. That's about it for me.
Cattle prod to the back. Worse than any low-voltage shock by miles.
I've learned why they call it a "flyback transformer" inside a television set. :v:
I'm glad I got zapped only by the capacitive charge. The voltage needed to drive a 21" color CRT is fatal.
Once I was sparked with 220Volts. I was connecting wires to radio, that were online (connected to main). I was kid old around 7-9 years I think.
Second I was sparked by TV flyback transformer (I made spark generator with one transistor, main cool, feedback coil). I just stood up rigid as fuck and went away for minute.
And many other occasions but I don't remember them really. I think I am a bit immune to electricity.
Got zapped by 220v mains once, that sucked.
I lost pliers to 3-phase.
Touched a small 300v capacitor from a throwaway camera on accident, that scared the piss out of me.
[QUOTE=Fourier;49405779]Once I was sparked with 220Volts. I was connecting wires to radio, that were online (connected to main). I was kid old around 7-9 years I think.
Second I was sparked by TV flyback transformer (I made spark generator with one transistor, main cool, feedback coil). I just stood up rigid as fuck and went away for minute.
And many other occasions but I don't remember them really. I think I am a bit immune to electricity.[/QUOTE]
Let's not test that theory, though.
220v was definitely the worst, most of my electronics injuries are burns from when I worked on a lot more 3D printers. I have a few pinhole sized scars on my fingers from extruder burns, and used to have a heatsink shaped burn on my left pointer finger from poking a polulu heatsink that later slagged itself.
[QUOTE=false prophet;49405654]This may be a bit macabre, but I've been dying to ask. What is the worse electric shock any of you guys have had?
I licked a battery once. That's about it for me.[/QUOTE]
120V when I was tinkering with a PSU with the cover off, touched the heatsink and it was live (da fuq?)
220V on more than one occasion at work (HVAC)
Co-worker nearly got hit with 3-phase because it turns out electrical tape is NOT as good an insulator as they would like you to believe (we had to make a metal cover for the fuse box, and the wires feeding this thing were HUGE, only connectors we had that would fit them were the solid-copper connectors, and the wires were bulging out of the box so as he pushed the cover on, as soon as it touched the box it shorted and blew a hole straight through 22-ga. metal right in his face)
[QUOTE=Zero-Point;49406249]120V when I was tinkering with a PSU with the cover off, touched the heatsink and it was live (da fuq?)
220V on more than one occasion at work (HVAC)
Co-worker nearly got hit with 3-phase because it turns out electrical tape is NOT as good an insulator as they would like you to believe (we had to make a metal cover for the fuse box, and the wires feeding this thing were HUGE, only connectors we had that would fit them were the solid-copper connectors, and the wires were bulging out of the box so as he pushed the cover on, as soon as it touched the box it shorted and blew a hole straight through 22-ga. metal right in his face)[/QUOTE]
3-phase and electrical tape sounds like big fail from the start
[QUOTE=Zero-Point;49406249]120V when I was tinkering with a PSU with the cover off, touched the heatsink and it was live (da fuq?)[/QUOTE]
Live heatsinks in switching power supplies is very common.
I've shocked myself on charged caps (350V~) quite a few times.
Shocked myself on 240V mains once (live-neutral), thankfully there was a a little lightbulb in series that blew so it barely hurt.
Also shocked myself on a charged flyback which was most painful.
I was working on a vacuum cleaner and i thought these gold contacts where something that needed depressed. Turns out they have 120 VAC for the light and motor on the brush head......... Never found that screw driver.
I had a nasty sting from a neutral on a 277v emergency circuit. The wire nut had apparently been twisted on real tight with a drill. I used my Kleins to hold the wires still since they kept twisting. As soon as my thumb brushed those pliers I hung for about a second since I only touched rather than grabbed.
I've never actually been shocked when working on electronics. I've only even fried one part, I feel like I'm not worthy of being an EE.
I want to make a trophy case and fill it with all the parts I eventually fry, but I already got rid of the first one without thinking because it smelled too bad.
I was leaned over my desktop PC, with one hand on the metal case, plugged it in and pressed the start button on the back, and was promptly shocked with 230V. Haven't touched that thing since.
I've only ever been zapped by ESD, nothing worse than that.
I haven't even been stupid enough to lick a 9V battery.
Now heat on the other hand, let's not go there. I put a 9V battery in my pocket, that also had my keys. That was interesting.
[QUOTE=nikomo;49409631]I've only ever been zapped by ESD, nothing worse than that.
I haven't even been stupid enough to lick a 9V battery.
Now heat on the other hand, let's not go there. I put a 9V battery in my pocket, that also had my keys. That was interesting.[/QUOTE]
I was cutting metal with an oxy torch and right after i was done cutting. i took my glove off, removed the claps and moved the guide over with my bare hand. That is heat.
[QUOTE=Chryseus;49406843]
Shocked myself on 240V mains once (live-neutral), thankfully there was a a little lightbulb in series that blew so it barely hurt.[/QUOTE]
Do you not have ground fault circuit interrupters?
The worst shock I personally had was trying to get a stuck piece of bread from a toaster with a knife, which did trigger said GFCI
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Electrical Engineering V3
