After figuring out exactly how the AC input works on the Eltek flatpacks, I
wired up an adapter and applied 220 volts one of the power supplies. To my
delight there were no lightning bolts or sparks! Then with little
hesitation or regard for what might happen, I connected the 222 MHz 6 device
Larcan. And behold, stable 50 volts at 45 amps load. With 25 watts drive
from my Q5 xverter I get 955 watts output. This is nearly twice as what I
had been getting with my 4 device Larcan.
Now all I need to do is add a few more 220v outlets to the ham shack.
Apparently 2 are not enough.
Thanks for the suggestions.
Dave - K3SK
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======================
I use Eltec server power supplies for my SSPAs and up until now I have not
had an issue. I recently acquired a Larcan Hi-Hi that is capable of 1500
watts output on 222 MHz. After making the necessary changes to use the
Larcan I connected for testing to my 50V 3000 watt Eltec power supply. On
initial key down the amplifier easily puts out 1200+ watts but the supply
voltage drops significantly as does the RF output power. When running my
other amplifiers I do not have voltage drop and everything works fine.
I have tried this with 3 different power supplies. My assumption is I am
reaching the current limit of the individual supplies.
If each Eltec is set to the same voltage and current limiting, can I
parallel them? If so, is it any more complicated than connecting the
outputs together?
Dave - K3SK
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