[Lowfer] Ground cold end of coil?

[Bill Ashlock]

Eric,

Where did the pictures come from? Neat!

>it looks as if the cold end of the coil is grounded.  Is this right?
>In these pictures they are using coax.  The center lead is on one of the 
>taps and the shield is attached to the bottom of the coil which is
>grounded. In my case I just have a piece of 22 gauge solid coming off >the 
>protoboard and alligator clipped to a tap.  The only ground is a >coming 
>off the ground rail of the protoboard and goes to the water >faucet. My 
>coil is not grounded. Should the cold end of my coil be >grounded?

Not for most 1w applications. For higher power setups the loading coil can 
be used as a step-up transformer (grounding the cold end) in order increase 
the power delivered to the antenna. What is your input power at the moment? 
You should adjust your supply voltage so that the current into the final 
transistors times the voltage is 1w.

Bill

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