[digitalradio] A tad off-topic - Excess coax

2007-10-28 Thread Dave
Just put up a coax-fed Windom antenna and have about 15-20 feet of excess coax. I'd prefer to keep the overall length of the coax, just not sure if coiling it or laying it out flat would be better. I know the older Windoms needed a tight coil of coax near the antenna, but the 1:1 balun in this

Re: [digitalradio] A tad off-topic - Excess coax

2007-10-28 Thread Chuck Mayfield
If it were my station, I would wrap it around a 3 to 4 inch form and lay it behind the operating table. That would further limit RF noise and would do no harm to SWR. Best regards, Chuck Mayfield Neither a lofty degree of intelligence nor imagination nor both together go to the making of

Re: [digitalradio] A tad off-topic - Excess coax

2007-10-28 Thread Dave 'Doc' Corio
Hi, Chuck. Since that is just about the exact dimension for a choke balun from the original Windom design, would it have any effect on the impedance? I suppose I could just wrap it up and see for myself, but thought I should at least be nice enoough to respond, since you took the time to

Re: [digitalradio] A tad off-topic - Excess coax

2007-10-28 Thread Ralph Mowery
--- Dave 'Doc' Corio [EMAIL PROTECTED] wrote: Hi, Chuck. Since that is just about the exact dimension for a choke balun from the original Windom design, would it have any effect on the impedance? I suppose I could just wrap it up and see for myself, but thought I should at least be

Re: [digitalradio] A tad off-topic - Excess coax

2007-10-28 Thread Chuck Mayfield
Very little. It is a fairly broadband 1:1 transformer at HF frequencies and it forces the currents in the center conductor and shield to be equal. The amount of power lost in such a choke balun is very small compared to the power delivered to the load. See The ARRL Antenna Book 21, 26-21 73, de