| karma |
this is one dead ups from a bank. new it ran around 13 grand
now it in my hands.hmm im thinking air cooled zen. has a nice
big heatzink in it plus a hole lot more:bigeyes: |
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| karma |
| the picks dont do it justic:clown: |
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| Circlotron |
What's the power output rating? 1 to 2 kVA? Maybe you should see how practical it would be to convert it to a subwoofer amp. Not much difference between that and making a 60Hz sinewave. There is some sort of opamp sine oscillator in there somewhere. Just shove in lowpass filtered audio where this oscillator signal is normally fed to.
/Circlotron - acting like an armchair expert because he uses the word "just" as if it were easy. |
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| karma |
that would work but the transformer is another unit that plugs in to its huge 3 people to lift it. about the size of a basket ball.
not sure that this is. if it's a rectifier? not sure somthing to do with converting dc to ac i think |
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| karma |
thanks for the pdf here are some pic's of it allmost finished
its up and running just gota finish the fan power. i used the original rectifiers there rated over 600v so there really good
the amp under the board ill take a pic when its safe to turn it over;) |
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| karma |
| lol better clean before the old lady gets home:xeye: |
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| karma |
i would say i got about $70 worth of parts out of it. and the fan has a bafill built in so even at full speed i cant here it even at idol.
all in all best $20 i ever spent |
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| joensd |
| quote: | i would say i got about $70 worth of parts out of it. and the fan has a bafill built in so even at full speed i cant here it even at idol.
all in all best $20 i ever spent |
Now that is some real DIY.:att'n:
Nice gainblock you build there:djinn:
Regards
Jens |
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| karma |
| o yes i got one battery and there heavy lets see what i can do;) |
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| karma |
if anyone has a setup for charging batterys in a amp set me up
thanks.....:scratch: |
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| karma |
hmm gota wire em up the other way to much juice here 120v
total each cell is 12V
!!warning!! dont try this at home if you never worked with cells
shorting the cell would be a bad thing.cells can explode
theres a total of 10 cell at 6 only it comes up 77.7v ouch to much
big time. wire the other way would be 12v |
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| JOE DIRT® |
hahaha...Karma...great battery pack....if ya need help charging let me know....i think you know enough how to do it...I`m just up the road if you need help
Cheers!!The DIRT® |
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| karma |
i tryed it with 2 cells per channnel it does work just tryed it
wow gota make a pcb for a slow charge that way i dont have to time it |
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| JOE DIRT® |
| you can trickle charge them easy off a small transformer and diode isolate each cell......and ofcourse current limit so they equally get the same charge:nod: |
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| karma |
| sounds good. i gota source out some parts im tapped out. to be continued;) |
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| karma |
batterys finished even has a breaker bonus.i found the original
charger from the ups im going to use a dremal tool to cut the pcb.
tested it charges. still gota switch it over to batterys to charger but it works. sunday ill finish it. and time it
to see what the battery life is;) |
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| ShiFtY |
For $10 I just picked up a switched mode supply for a mainframe (?) rated at 5V 250A ! It is huge, the Vout is a couple of bars an inch wide and several mm thick with a bolt attachment! Could make a nice welder...
Inside it has some pretty massive heatsinks, hefty diode bridge & regulators, and 4x 560uF 450V and 3x 15000uF 7.5V caps. Which incidentally should be nice for my tube amp project, where I need high voltage caps and also low voltage for the heaters. Score!
The case is pretty strongly built too, it would have cost a packet back in 1995 when it was new. The 150mm cooling fan will probably end up in my computer, running at low RPM for silent operation.
Yay for industrial power supplies! :) |
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| karma |
ya sure u get some desent stuff.cheap and it helps the envirement less land fill. i once lived beside this guy that worked for the city. he would come home with new outboard motors for boats every week. i asked him where he was geting all the motors he said.people would buy a new motor for the summer
and when the summer was over thay would toss em out. thats wast. that was in parry sound ontario. cottage county. most of the stuff i get is from work if it tested bad i give my boss a few bucks for it
ya n.o.s is good
;) :rolleyes: |
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| karma |
| finally finished it. i got about an hour and a half of battery life on my zen sounds great takes about a half hour to charge.hmm next maybe some meters:rolleyes: |
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| karma |
| last one promise:devily: |
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| karma |
| update tryed somthing diferent with the cooling fan its been running for over an hour and the batterys still fresh;) |
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| Da5id4Vz |
| Is that a light bulb on the PCB? A non linear resistance for the charger? |
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| karma |
| yes i ran out of lcd's;) thay have a nice ceramic base |
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| Da5id4Vz |
| Looks like the graticule lamp from some Tek scopes. |
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| elizard |
nice work ..
but the real question is .. does it sound better? :) |
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| JOE DIRT® |
| I had a ton of them from old photo copiers....the pins were a ****** to solder being steel....but hell they are bright |
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| karma |
i would say yes. theres more base than before. and if i play the same music theres a few sound's i can here. that were not there before:scratch: and when it comes to the battery the cooling fans
voltage regulater was what was killing the battery.i replaced it with a power resister . i ran it for 3 hours last nite battery is still
good:scratch: when is this thing going to drain.ill need to put a
meter on the battery pack so i can tell when it's do for charging
i cant keep using my bel merit tester. i would say its the amps because its only running at 28.7v
yes battery power works;) |
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| karma |
| i will have a webpage shortly just some finished pic's for the record's |
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| Da5id4Vz |
| How are you doing your ballanced inputs for the GainClones? |
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| karma |
| i would have used rca's but i had non. nothing diferent about it just used 2 pin's instead of 3 for each input. just looks good;) |
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