60kw class A with 160kw input power 37.5 % . I understood Class A was only 25% . Thats 16 dollars an hour since power company will give you a break on usage at that level . That a nice little furnace there. 😱
Thank You Mr Pass, I got the idea doable input cause input capacitance also doable because the current limitation from front end its cause the amp bandwidth decrease.
now my question what the bandwidth for this amp ? and what we can to increase the bandwidth ? ( more voltage for front end ? )
Man, what happens when you take a nap, SSI called about my disability, The power supply company quoted me 10K in supplies for 1 amp, Magnepan said "NO", My boat is at almost $4K, and now were talking about 186,000 miles per second... Hey I have 2 lasers I built, red 400mw, blue 1w, can we use them for the cigarette lighter option? And now we are making an MRI amplifier??, WoW!
Ps: I actually have a pic of both lasers which burned through a cd case and made "green", let's not forget the smoldering hole in the wall, thank god I didn't go on vacay!
Rob
Ps: I actually have a pic of both lasers which burned through a cd case and made "green", let's not forget the smoldering hole in the wall, thank god I didn't go on vacay!
Rob
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Really? A quick search for the inventor named Pass, Nelson S returns:
http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=5&f=G&l=50&co1=AND&d=PTXT&s1=%22Pass,+Nelson%22.INNM.&OS=IN/"Pass,+Nelson"&RS=IN/"Pass,+Nelson"
Someone sure thinks you invented something?
😉
But you were right about "years ago".
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Calculator smoking, pen running out of ink, making great strides to git-r-done! I guess I need to know how much extra voltage the rails can take without an incident. The power supply is coming along, but in another direction from previous posts. So, great progress indeed! I might just call it the Gefilter... wander if it is trademarked?
Rob
Rob
An externally hosted image should be here but it was not working when we last tested it.
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I guess I call it the Gefilter then. It says "it is a device of musical genious" Nuff said... Rob https://www.facebook.com/pages/The-GeFilter-Time-Machine-Rush/219716304724027
An externally hosted image should be here but it was not working when we last tested it.
4lbs per pair. I hope that is a typo. I would expect the heatsinks to weigh several hundred pounds even with forced cooling.
heat sinks
Rob
10lbs tops... Ps, it is forced cooling, just gave me a new idea! Thanks! I luv this place!
Rob
cooling
No water means no leaks and hazards associated with 300v and a ton of amps...!
I don't want to look like the pic I posted! I don't think anyone on here except whoever drew the amp has more time into it, nope..
Rob
I'm checking the alternative now...
No water means no leaks and hazards associated with 300v and a ton of amps...!
I don't want to look like the pic I posted! I don't think anyone on here except whoever drew the amp has more time into it, nope..
Rob
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The 100W Aleph 4 that my Dad built shows the extent of the heatsinking required. OK this is (almost) naturally aspirated, I have added a couple of small fans to keep the caps reasonably cool. This beast runs at 50 degrees C in our temperate UK climate.
I can't seem to attach the photo.
Here was his thread on the build - http://www.diyaudio.com/forums/pass-labs/172276-aleph-4-strickly-diy-project-build.html
I can't seem to attach the photo.
Here was his thread on the build - http://www.diyaudio.com/forums/pass-labs/172276-aleph-4-strickly-diy-project-build.html
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Even better than Liquid(water) might be Fluorinert. You can totally submerse your pcb, output section and all into Fluorinert liquid and control the temp. A process called nucleate boiling will regulate the temp. Fluorinert is available in various boiling points and is an electrically inert fluid. immersed in this fluid your circuit will generate greater and greater (To put it lightly) heat until you reach the boiling point. At the boiling point bubbles of heat float to the surface carrying away the heat and being replaced by cooler(less than boiling point) fluid causing a regulation action. Works quite well IMHO
This would be true yes. What contaminants were you expecting to be introduced?
Cray Computer's, one of the most advanced supercomputing things on earth at the time, used to use this philosophy on one of their earlier models.
Cray Computer's, one of the most advanced supercomputing things on earth at the time, used to use this philosophy on one of their earlier models.
real "liquid" cooling huh?
We got flooded 3x since living on the top of a mountain, the first time I had no pumps and 7" of water in the basement, the fire dept. came and said they barely made it, the water was up to the doors of the pumper at the bottom of the hill.. Sir, If the water reaches the outlets you have to turn off the breaker to the house... I asked my father in law, "can you get electrocuted?" NO, was the answer. That led me to do all sorts of crazy stuff, like walking around in the water with exposed extension cords, and one great invention too! The home made hot tub! Took a small 1/2 HP pump and put it in the bathtub while I was in it. Father in law says it's safe, but make sure the gfci works, no problem, threw the hair dryer in, snap.. Yep it works, I do admit adding a safety feature, I let a trickle of water down the drain at all times just in case. But the pump made the heat and a lot of circulation.. Might do it again my back hurts!!!
Would I trust the father in law today? Nope, not after the "pending" divorce, he might tell me the wrong way to clean my GUN!
Rob
I can just throw it in the bathtub then? Reminds me of the stuff I did, and thank god I got to learn from a hell of an electrician, my father in law.
We got flooded 3x since living on the top of a mountain, the first time I had no pumps and 7" of water in the basement, the fire dept. came and said they barely made it, the water was up to the doors of the pumper at the bottom of the hill.. Sir, If the water reaches the outlets you have to turn off the breaker to the house... I asked my father in law, "can you get electrocuted?" NO, was the answer. That led me to do all sorts of crazy stuff, like walking around in the water with exposed extension cords, and one great invention too! The home made hot tub! Took a small 1/2 HP pump and put it in the bathtub while I was in it. Father in law says it's safe, but make sure the gfci works, no problem, threw the hair dryer in, snap.. Yep it works, I do admit adding a safety feature, I let a trickle of water down the drain at all times just in case. But the pump made the heat and a lot of circulation.. Might do it again my back hurts!!!
Would I trust the father in law today? Nope, not after the "pending" divorce, he might tell me the wrong way to clean my GUN!
Rob
You'd need to keep the cooling system clean of dust and any dissolved metal particles from the heatsink, pipework and pump. OK the pipework and pump could be plastic but the heatsink will dissolve in time.
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Fans are not so reliable. You'd need an over temperature shutdown system in the event of fan failure.
shut down
Rob
All amps should have shutdown! Not only for cooling issues, but dealing hazardous voltages, The Gefilter is capable of mass destruction! So great grounding is a must!
Rob