Hi Zen Mod.
More questions. Where does the 22 uF Silmic go? I can't find that in schematic, but there are 3 pieces of 10 uF.
Any special requirement of LED101? Has it to be green or can it be any other color?
More questions. Where does the 22 uF Silmic go? I can't find that in schematic, but there are 3 pieces of 10 uF.
Any special requirement of LED101? Has it to be green or can it be any other color?
Hi Zen Mod.
I am back on building the LufDEFP and I am ready to power it up and need some guidance.
All potentiometers are in mid position and power supply is +- 26,3 V DC unloaded.
What to do with the jumper?
Anything else to pay attention to?
I am back on building the LufDEFP and I am ready to power it up and need some guidance.
All potentiometers are in mid position and power supply is +- 26,3 V DC unloaded.
What to do with the jumper?
Anything else to pay attention to?
start with one channel connected to PSU, in your case - just one channel energized (second channel no mains fuse)
one DVM at output, to observe DC OFfset; for start even few V are OK< goal as close to 0V (up to +/-100mV)
one DVM across rail resistor (0R22, effectively 0R11) to observe Iq; 198mV for 1A8
one DVM across LU (S to D; practically output to Source of cascode mosfet, to observe and set LU Uds to 2V4)
inputs shorted to GND, no load at output
jumper in FE open
power up, all 72 eyes you have on all 3 DVMs to observe is everything in ballpark
fiddle with all 3 appropriate trimpots to set what's needed to set
if you did assembly proper, it'll go as breeze
when you're done with first channel, defuse it, move all DVMs to second channel, fuse it, repeat procedure
one DVM at output, to observe DC OFfset; for start even few V are OK< goal as close to 0V (up to +/-100mV)
one DVM across rail resistor (0R22, effectively 0R11) to observe Iq; 198mV for 1A8
one DVM across LU (S to D; practically output to Source of cascode mosfet, to observe and set LU Uds to 2V4)
inputs shorted to GND, no load at output
jumper in FE open
power up, all 72 eyes you have on all 3 DVMs to observe is everything in ballpark
fiddle with all 3 appropriate trimpots to set what's needed to set
if you did assembly proper, it'll go as breeze
when you're done with first channel, defuse it, move all DVMs to second channel, fuse it, repeat procedure