I came across a couple 4" diameter torrid transformers rated at 200va a while back. They were used in a marine low voltage lighting system and drop 120volts to 12 volts. If I were to hook them 12 volt to 12volt would I lose too much in the conversion to power a oscilloscope at 40 or 50 watts?
-
-
Re: Isolation transformer using 2 torrids
Yes, you will have conversion lost but nothing to lose by trying to see if it will provide enough power, just use 40 Watts lamp for testing.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: Isolation transformer using 2 torrids
It works better than I thought it would. At 122 volts drawing .52 amps in, it has a 3.5 volt drop with a 60 watt bulb attached. So with a 118.5 volt output at .5 amps I'm happy. A .02 amp loss isn't a deal breaker.Comment
-
Re: Isolation transformer using 2 torrids
You're loosing voltage, not current, when you backfeed one tx w/ the other one. That extra .02A on the line side only goes to losses in the two txs.
Measure the voltage one the 120 side of the second tx, before and after you hook the bulb up. Then use Ohm's law to calculate the impedance of your set up.
It sounds like you want to 'float' a scope. You'd be better off floating the equipment under test, as the entire scope and all "ground" leads will now float up to whatever you've got connected to it."pokemon go... to hell!"
EOL it...
Originally posted by shango066Originally posted by smashstuff30guilty,guilty,guilty,guilty!
guilty of being cheap-made!
Comment
-
Re: Isolation transformer using 2 torrids
That was what I was originally wondering when I did this was the loss. At no load it showed 121 volts on the output(1 volt drop).
Thanks, I was wondering what it was going to happen with the ground.
To be usable for anything very large I would probably have to rewind the secondaries and parallel them insteadComment
-
When is talk about making isolation transformer on poor-man way, always I see schematic 240/12-12/240.
So, I wonder, is this wiring from my attachment it work, bringing some good feature or it is bad idea and why?... -
Hello!
I'm looking at an original Xbox PSU: Foxlink ftps-0002 rev. B. The 12 V output is too low, and the 5 V output is too (?) high. Unfortunately I don't have an oscilloscope but only a DMM for diagnosis.
Measured voltages with no load:
After rectifier diodes
12V: 6.17 V
5V: 5.67 V
Secondary transformer pins AC measurement (really don't know if this says anything)
12V: 2-2.5 V
5V: 1.04 V
I also have another (working) Xbox psu from Delta. The same measures there, in order, being: 10.79,... -
Hi all,
Got this local made DC power supply (12/14V) given free as the transformer has melted. There is no marking or indication to identify what type or rating of transformer used.
Fyi,. I had a busted autogate mainboard with transformer with marking 13-0-13 . Is this the 13v dc type transformer?
My questions are
1. How do i test to see if the transformer is in good working condition?
2. Can this transformer (marking 13-0-13) be used to replace the melted transformer on the DC power supply?
Hope you guys understand what i was asking. My intention is... -
Hello All,
i would like to post an interesting topic regarding 3-phase stepdown transformer which we suspect to cause an overcurrent (138A) which resulted to power tripped off of the HV power supply (80KV output).
Problem statement: Power tripped Off
Initial Problem: Found 2 IGBT and 2 rectifier diodes shorted (burnt).
Action Done:
1) Replaced the faulty parts with good spare.
2) Measured impedance of the 3phase input lines and found that L2 to L3 has 23.3ohm while other pairs are 51Kohm. This pins will... -
This specification for the ASUS Transformer T101HA - X5DHD Hybrid (2-in-1) can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T101HA - X5DHD boardview and T101HA - X5DHD schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet,...09-06-2024, 04:40 PM
Comment