Kiss Analog! Hey great video. I have a Tripp Lite LC1200 line conditioner. looking for the schematic. I'd like to install a thermistor/s for the output recepticles. Any ideas? Perhaps another video on that. Thanks Mieux
Thanks for asking. Do you want schematics or pictures of the boards? Do you have one? If so, can you send a picture and I can identify the schematic from them?
Why do you look so familiar dude? Just subscribed. Do you live in the northern Midwest? Maybe I’m loosing it but my gf said the same thing before I had a chance bring it up.
Lol you’ll have that. I get the same thing actually. So I’m looking for parts to build a liner power supply constant current. I’m trying to get into repairing laptops smartphones etc. every time I get parts it seems that they aren’t going to work for what I need. I’m kind of a newb, but I know what direction I’m heading. I’m having a hard time finding what I need, both from my inexperience and lack of knowledge, and well my inexperience and lack of knowledge lol. Any help would be appreciated. The more I learn the more I realize I don’t know shit. Thank you for your videos.
I have a PR-30, similar, has 4x 2N3771 and one bank of capacitors. I think the Thermistor is part of a crowbar circuit. I'm about to pull the legs on mine, to see if i get voltage at the posts. If i do, the op amp regulator is still good. I can replace it later. I suppose if you had a variac, you could slowly fire up the supply, less stress on the transformer. You can hear a thunk when you throw the switch on! BTW, this is the first I've seen a schematic of any Tripp Lite power supply, thanks. KI6VST
. Just a small quibble: The RM1 and RM2 are not bridge rectifiers. They are simply dual diodes. Note the two + outputs. A bridge rectifier would have a + and a - output. For this circuit design we don't need bridge rectifiers because the secondaries of the transformer are center-tapped. Thus as each of the two outside wires of the secondary swing from positive or negative with the AC input, first one and then the other diode conducts and the positive DC output is referenced to the center tap, which becomes the negative lead. Of course, that doesn't change the main point, namely that the huge capacitor banks are right across the rectifier outputs, leading to huge inrush current. The inrush current is only limited by the resistance of the transformer windings and associated wiring, which ain't much!
Thanks for sharing, your explanation is fine, but maybe a bit hard to follow. I may have a suggestion on what may make it easier. If you open the image in a simple drawing program, then can you draw lines on top of the image and remove the lines again, wary easy. :-) By the way, it could be wary interesting to learn what to put before the transformer, AC noise filters, inrush current, lightning protection, heat protection and so on.
Fried Mule Fried Mule Thanks for the feedback - I actually started in a drawing package, but then thought it would go faster without. I like your idea of drawing and erasing - then I can do each section then erase to go to the next section - or whatever so that it doesn’t get to messy. I’ll cover the other items as well. I actually did cover the inrush using the thermistor. This is Jerry’s Power supply that he is planning to add the thermistor based on my video and had a question.
@@KissAnalog Yes the part about the thermistor was part of the reason for asking about the rest:-) I do also think that if you used different colors to i.e. + / - it will be more clear:-)
Thermistor installed and working great so far.
That’s awesome!! Thanks for the update!
Great info. Thermistor is working great.
thank you for the explanation. I am about to dig into the 50 amp version of the supply.
Kiss Analog! Hey great video. I have a Tripp Lite LC1200 line conditioner. looking for the schematic. I'd like to install a thermistor/s for the output recepticles. Any ideas? Perhaps another video on that.
Thanks
Mieux
Thanks for the question Mieux! Why do you want to do that? Maybe I can help…
Looking for Tripp Lite PR-3A internal images/diagram, any chance you have this resource?
Thanks for asking. Do you want schematics or pictures of the boards? Do you have one? If so, can you send a picture and I can identify the schematic from them?
@@KissAnalog thanks for the reply, I got it sorted out
Why do you look so familiar dude? Just subscribed. Do you live in the northern Midwest? Maybe I’m loosing it but my gf said the same thing before I had a chance bring it up.
LOL I get that I look like different people all the time;) Thanks for being here.
Lol you’ll have that. I get the same thing actually. So I’m looking for parts to build a liner power supply constant current. I’m trying to get into repairing laptops smartphones etc. every time I get parts it seems that they aren’t going to work for what I need. I’m kind of a newb, but I know what direction I’m heading. I’m having a hard time finding what I need, both from my inexperience and lack of knowledge, and well my inexperience and lack of knowledge lol. Any help would be appreciated. The more I learn the more I realize I don’t know shit. Thank you for your videos.
A CONTINUATION OF THIS LECTURE SOUNDS GOOD TO ME.WHAT IS THAT DEVICE THAT LOOKS LIKE A ZENOR DIODE WITH THE TAP WIRE?I HAVE NEVER SEEN THAT BEFORE.
Sorry, this got hung up and I just got it in my box... I think you are referring to the MOV.
I AM JUST WONDERING IF THOSE TRANSISTORS IN PARALLEL WOULD HAVE A CURRENT HOGGING PROBLEM?
Great question! I’ll post a video explaining why they work well in parallel.
@@KissAnalog THANK YOU FOR YOUR TIME.
You bet!
I have a PR-30, similar, has 4x 2N3771 and one bank of capacitors. I think the Thermistor is part of a crowbar circuit. I'm about to pull the legs on mine, to see if i get voltage at the posts. If i do, the op amp regulator is still good. I can replace it later. I suppose if you had a variac, you could slowly fire up the supply, less stress on the transformer. You can hear a thunk when you throw the switch on! BTW, this is the first I've seen a schematic of any Tripp Lite power supply, thanks. KI6VST
So it isn’t working now? Jerry added a thermistor at the input to control the inrush current. See below. Thanks for the comment!
.
Just a small quibble: The RM1 and RM2 are not bridge rectifiers. They are simply dual diodes. Note the two + outputs. A bridge rectifier would have a + and a - output. For this circuit design we don't need bridge rectifiers because the secondaries of the transformer are center-tapped. Thus as each of the two outside wires of the secondary swing from positive or negative with the AC input, first one and then the other diode conducts and the positive DC output is referenced to the center tap, which becomes the negative lead. Of course, that doesn't change the main point, namely that the huge capacitor banks are right across the rectifier outputs, leading to huge inrush current. The inrush current is only limited by the resistance of the transformer windings and associated wiring, which ain't much!
Ray Albers Good catch and thank you for that correction.
Thanks for sharing, your explanation is fine, but maybe a bit hard to follow. I may have a suggestion on what may make it easier. If you open the image in a simple drawing program, then can you draw lines on top of the image and remove the lines again, wary easy. :-)
By the way, it could be wary interesting to learn what to put before the transformer, AC noise filters, inrush current, lightning protection, heat protection and so on.
Fried Mule Fried Mule Thanks for the feedback - I actually started in a drawing package, but then thought it would go faster without. I like your idea of drawing and erasing - then I can do each section then erase to go to the next section - or whatever so that it doesn’t get to messy. I’ll cover the other items as well. I actually did cover the inrush using the thermistor. This is Jerry’s Power supply that he is planning to add the thermistor based on my video and had a question.
@@KissAnalog Yes the part about the thermistor was part of the reason for asking about the rest:-)
I do also think that if you used different colors to i.e. + / - it will be more clear:-)
Fried Mule I like that idea!! I appreciate the support!!
@@KissAnalog you are so welcome!! :-)