[Elecraft] EC-2 Project

[CYR999@extremezone.com]

This is good stuff!!!

Quoting Don Brown <DolfinDon@msn.com>:

> Hi Gang
> 
> How does this sound for a simple project. Take a MFJ-4125 25 amp
> switching power supply. Open the case and remove the rubber feet. Cut
> out a rectangular hole in the back of the EC-2 to match the back of the
> MFJ. Offset the cutout to one side as far as possible. Mount the power
> supply to the bottom of the EC-2. With a hole saw drill 2 or 3 1" holes
> in the bottom panel in front of the power supply for air and cover with
> screen or grill cloth. On the other side from the power supply mount a
> powersonic battery like Elecraft uses in the K2. Bring out the back a 12
> Ga cable with power pole connectors on the end and a 20 Ga cable with
> the standard K2 power connector. Wire the battery to the power supply
> with a limiting resistor and diode so it is float charged from the power
> supply. Connect the 20 Ga wire to the battery and connect the 12 Ga
> wires to the binding posts on the power supply.
> 
> You could also add a LCD voltmeter/amp meter module to the front panel
> if you like but the K2 already has this built in. Add maybe a power on
> LED and switch.
> 
> Anyway with the setup you would have a matching power supply for the
> K2/100 and a battery backup. Run up to 100 watts normally but if there
> is a power failure the K2 will automatically switch to QRP mode on the
> battery with 10 watts or so out.
> 
> I haven't done it yet but I have measured everything and it looks like
> it will all fit. There is even enough room for my solar controller if
> you want to charge the battery from a solar panel for QRP field use.
> 
> If you mask off the front panel of the EC-2 and paint a black area like
> the K2 and mount a K1 bezel over the LCD voltmeter/amp meter display it
> would look even more like the K2.
> 
> 
> Don Brown
> KD5NDB
> 
> 
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