Tony, Here is a drawing of the connector on the back of the radio. You can short out pins 2 and 3, the coil is used for a DC filter, as well as the cap is used part of the filter. I hope this helps. Daniel KC4PLC
tony dinkel wrote:
> any one of y'all got a johnson 550 manual. I'm trying to get one powered up
> for a friend and have no power cord. I have ground on pin 1, +12 on pin 4.
> Where else do I need to put +12?
>
> tnx,
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