Leco amplifier module tested at 2-4 Ohm +/- 99,5Vc - diyAudio
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Old 1st October 2011, 06:05 PM   #1
DjLeco is offline DjLeco  Romania
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Default Leco amplifier module tested at 2-4 Ohm +/- 99,5Vc

I have promised on other forums, about testing mine modules on 2 ohms dummy load, today I had some free time, and I made that test.

Output devices uded on this test are MJW21195+MJW21196, 5 paralel on each side, power supply +/- 99,5Vcc in idle and at max load dropping till around +/- 96Vcc.
I doesn't have a clampmeter so I must use digital ampermeters, but mine gorgeous Metrahit multimeter, is not intended to use above 10 amps, shows overload...

So, I have replaced on Kewtech multimeter, the original 15 Amp fuse with a 30 Amp fuse, and I have compaired it, first time on 0-10 Amps current (230 volts 2000W projector bulb), and second time on 0-30 Amps, using an 230Volts 5000W projector bulb.

On aprox 4500 Watts it shows 20,1 amps seried with bulb(5000W one), and after I have measured how many volts are dropping on soket wall, loaded with a 5Kw lamp, it falls from 225volts idle to 213 volts at max load.


On amplifier test, I have used mines 4 ohms dummy load , always ampermeter seried with the load, to easy calculate output power from relation P=UxI.


Ampermeter test on scale 0-10A:

2Kw amperage.MOV - YouTube



Ampermeter test on scale 0-30A:

5 Kw amperage p1.MOV - YouTube

5Kw amperage P2.MOV - YouTube

Amperes shows on 5Kw bulb supplied:

5Kw amperege p3.MOV - YouTube

Power drop (volts) on 5Kw loading:

5Kw tension dropping.MOV - YouTube


Compairing bulb with hand (dimension):





Now, let the test begins!


Leco module on hard working:
Leco 4-2 ohm part 1.mkv - YouTube

Leco 4-2 ohm power dropping.mkv - YouTube

Any opinions regarding sustained power ,and output power?


Any comment are apreciate.
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