[TowerTalk] A DC in Coax Question

[Larry Comden]

TTers.

I have built and used several copies of the DC injection and recovery for coax as designed by AD5X and published in a recent QST article.

There haven't been any problems YET. I'm concerned that at some frequency I'll end up with a series resonant circuit shunting lots of RF to ground.

How can I check for such a situation? And can I check just the unit connected to a dummy lod or will each antenna /feedline combo have to be checked? The latter might be difficult since our club uses these gadgets at Field Day, PA QSO Party, etc.to power tuners and antenna switches.


TIA & 73

Larry K3VX