I meant 32V regulated. I got mixed up with all the numbers.
55V is free-running on about 12V..because it is not 100% efficient.
The reason I was unsure is because I am not the one that ordered these transformers, they are a friend of mine's that we wanted to sell so I could fund a new amplifier project. He wanted to use his share to buy the neighborhood kids a gas scooter to play with.
I am only 17 and have a very limited income anyway, I figured that you guys might want to have some of these transformers...but apparently you would rather just pick out my lack of knowledge. My original post has the correct info...how the thread got this long I don't know.
These units will drop into most of the schematics floating around the forum, which is why I thought people would use them.
-Matt
55V is free-running on about 12V..because it is not 100% efficient.
The reason I was unsure is because I am not the one that ordered these transformers, they are a friend of mine's that we wanted to sell so I could fund a new amplifier project. He wanted to use his share to buy the neighborhood kids a gas scooter to play with.
I am only 17 and have a very limited income anyway, I figured that you guys might want to have some of these transformers...but apparently you would rather just pick out my lack of knowledge. My original post has the correct info...how the thread got this long I don't know.
These units will drop into most of the schematics floating around the forum, which is why I thought people would use them.
-Matt
Thanks Zag. Just received my Transformers and they're beautiful peices of work. Don't pay any attention to those Mathmatical naysayers. If they are half as smart as they say they are they could easily change the winding ratios to suit their application. If your cars battery is down to 10 volts then it won't start anyway so who cares what the rail voltage is. I will post pics of your Transformers in action when I complete my project. Thanks again!
2pist said:
why would anyone in their right mind pay too much for a transformer in the first place, only to have to modify the windings anyway... 😛
zagisrule! said:
Matt, these guys pull your chain and you jump. Stop it.
These tansformers you had made are worth every penny. Besides, If I don't have them stuffed in boards by christmas I'll hang them from my christmas tree. When my wife saw them she thought they were ornaments.
2pist said:
too bad I'm in Australia, and we don't have pennys.... so, guess they're worth nothing then aye.
I don't know how I missed this thread...
Any left?
What would the shipping costs be to Canada?
Do you take Paypal? I'd love to take a binch of these, but I don't think I have the funds avaialble for more than 1 or 2.
Any left?
What would the shipping costs be to Canada?
Do you take Paypal? I'd love to take a binch of these, but I don't think I have the funds avaialble for more than 1 or 2.
Guys,
I'm new to this but I am lanning to build myself a monoblock class D amp using the Hypex UcD180 kit (180W). So if I get that kit and one or two of the big transformers do I have all that is needed for building it? Is this SMPS transformer all that is needed to supply the required +/- 50V that the UcD180 needs to function?
Thanks in advance.........
I'm new to this but I am lanning to build myself a monoblock class D amp using the Hypex UcD180 kit (180W). So if I get that kit and one or two of the big transformers do I have all that is needed for building it? Is this SMPS transformer all that is needed to supply the required +/- 50V that the UcD180 needs to function?
Thanks in advance.........
The transformer is just one component of a switch mode power supply (SMPS). I suggest you either abandon your idea, delay it by at least 6 months whilst you learn how to build an SMPS, or find a suitable SMPS kit (I've never seen one).
FYI: These transformers are still available.
Shipping to Canada or Australia should be around $10US for one or two units.
Yes they will supply +/- 50V or more but are best run regulated at +/-35 or so. The big unit will not drop it's rails at all even running some subs bridged into 1 ohm! Low efficiency lateral-mode MOSFET's and all...that is 40A plus to the subs!
Thanks for posting the picture 2pist! 🙂
Completely lost track of this thread for a while.
-Matt
Shipping to Canada or Australia should be around $10US for one or two units.
Yes they will supply +/- 50V or more but are best run regulated at +/-35 or so. The big unit will not drop it's rails at all even running some subs bridged into 1 ohm! Low efficiency lateral-mode MOSFET's and all...that is 40A plus to the subs!
Thanks for posting the picture 2pist! 🙂
Completely lost track of this thread for a while.
-Matt
Great! I figured with no response to my earlier post that they were all gone. Looks like just the ticket for a couple of amps.
I think I'm going to want 8 of those mosfets, and 2 transformers -- the biger ones. 😀
I think I'm going to want 8 of those mosfets, and 2 transformers -- the biger ones. 😀
Phew...
I had forgotten all about these transformers. I had emailed you a while back, but had switched email addresses (and lost yours). 🙄
I would like to buy two of the larger ones. Also would be interested in seeing the dimensions/drawings of the heatsinks you talked about...availability and such.
Are these the parts from the Synopsis amplifiers? I haven't seen them, but I might have read this somewhere else.
I have designed and built car amplifiers for personal use and close friends, but not for several years. And my wife keeps bugging me to build her a five channel...
I wouldn't even think about going into the marketplace with the mindset of the current generation of car audio buyers. There are so many negative dynamics hitting the car audio market that it's borderline shameful. "I want 1000W for $14.99!" And someone is going to deliver that. It only fuels the fire for cheaper and more poorly designed equipment made by the former "top brands" in the industry.
It's got to stop somewhere.
My address: envisionelec(at)earthlink(dot)net
I had forgotten all about these transformers. I had emailed you a while back, but had switched email addresses (and lost yours). 🙄
I would like to buy two of the larger ones. Also would be interested in seeing the dimensions/drawings of the heatsinks you talked about...availability and such.
Are these the parts from the Synopsis amplifiers? I haven't seen them, but I might have read this somewhere else.
I have designed and built car amplifiers for personal use and close friends, but not for several years. And my wife keeps bugging me to build her a five channel...
I wouldn't even think about going into the marketplace with the mindset of the current generation of car audio buyers. There are so many negative dynamics hitting the car audio market that it's borderline shameful. "I want 1000W for $14.99!" And someone is going to deliver that. It only fuels the fire for cheaper and more poorly designed equipment made by the former "top brands" in the industry.
It's got to stop somewhere.
My address: envisionelec(at)earthlink(dot)net
An externally hosted image should be here but it was not working when we last tested it.
Hey, the transformers and MOSFETS arrived today. Canada Post dinged me an additional $11.07, but I kinda expected that...
Just so I don't do nuthin dumb...
What's the wiring diagram of the transformers? I'm more or less assuming that the primaries are the bifilar (octofilar?) big 'uns, and the secondaries are the single 4 wire group ones. It would be nice to make sure that I'm not doing anything ridiculous and wiring them out of phase, or something silly like that.
Looking at them from the top, I have 2 "Rows"
(G) (G) (R) (R) (G) (G) (R) (R)
(R) (G) (R) (G)
I assume the top row is the primaries, with red being one winding, and green being the other. I'm hoping that if I group the center 4 elements to my +12VDC source, and switch ground between the outside pairs of windings, I'll get an alternating magentic field, and not just saturate the core. 😛
Similarly, I'm hoping that by joining the two secondaries in the middle, I'll get a result that I can run to a bridge
Or, I could just ask for a diagram. 🙂
The transformers look nice and beefy,looks good for whatever kind of power I'll likely throw at it. BTW, what's the turns ratio again? 🙂
Just so I don't do nuthin dumb...
What's the wiring diagram of the transformers? I'm more or less assuming that the primaries are the bifilar (octofilar?) big 'uns, and the secondaries are the single 4 wire group ones. It would be nice to make sure that I'm not doing anything ridiculous and wiring them out of phase, or something silly like that.
Looking at them from the top, I have 2 "Rows"
(G) (G) (R) (R) (G) (G) (R) (R)
(R) (G) (R) (G)
I assume the top row is the primaries, with red being one winding, and green being the other. I'm hoping that if I group the center 4 elements to my +12VDC source, and switch ground between the outside pairs of windings, I'll get an alternating magentic field, and not just saturate the core. 😛
Similarly, I'm hoping that by joining the two secondaries in the middle, I'll get a result that I can run to a bridge
Or, I could just ask for a diagram. 🙂
The transformers look nice and beefy,looks good for whatever kind of power I'll likely throw at it. BTW, what's the turns ratio again? 🙂
I don't have any in front of me (haven't ordered them yet), but I would make the educated guess that the wiring is the following:
(G) (G) - (R) (R) (G) (G) - (R) (R)
Pri 1---------- COM---------Pri 2
(R) -- (G) (R) -- (G)
Sec1---COM---Sec2
EnvisionAudio said:
Yeah, that was my GUESS as well, however, before soldering that to a bunch of MOSFETS and a nice big bridge and watching it all go "bang" I figured I'd ask for certain. 🙂
I wouldn't test them out with your expensive ones, and certainly not with multiples of them. Try a couple cheap IRFZ44's first to make sure there is no smoke or saturation.
Just my two cents. 😎
Just my two cents. 😎
Checking windings on x-formers.
Hi, I have built many smps in the past and sometimes used prewound transformers. I figured out a little trick that seems to work well. Using a working amp, put a 20 ohm resistor in series with the output, drive one set of windings. Then with a scope or good voltmeter, you can ring out the phasing and turns ratio! Nice looking toroids you are selling. regards, Steve
Hi, I have built many smps in the past and sometimes used prewound transformers. I figured out a little trick that seems to work well. Using a working amp, put a 20 ohm resistor in series with the output, drive one set of windings. Then with a scope or good voltmeter, you can ring out the phasing and turns ratio! Nice looking toroids you are selling. regards, Steve
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