[Antennas] Fw: Toroids - what kind - turns?

Mon, 28 Apr 2003 17:06:32 -0700

Are you allowed an outside TV antenna?  If so, look me up (K6ACZ) on
qrz.com and take a look at my MFJ Loop disguised to look like a TV
antenna.  I also have a R-7000 with the base at 10 ft.  The loop is 10
times better than the vert.  I have CC&R ant restrictions but am
allowed a TV antenna.
GL & 73

Jim Sutton wrote:
> 
> I am planning to install a wire antenna in my attic - since Condo rules prevent an outside antenna. The antenna will use 12 v relays to alter the antenna length to accommodate various bands.  I intend to use standard drop cord for the 12 volts required to operate the relays.  A maximum of 200 watts will be the output of the transmitter.
> 
> Now the question. Since the control line for the relays will be close to the antenna it will of course receive a blast of RF which would then be seen at the rig control point,  the 12 V spower supply and who knows where else. It appears to me that toroids or beads would largely eliminate this problem.
> 
> So the question really is - what size of toroid(s)- how many turns and what material would be best to cover from 4 to 30 Mhz?  The same general questions apply to beads.
> 
> Thanks for you thoughts,
> 
> 73/Jim/AC4CZ
> 
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__________________________________________________________________________                       
                                Alan Zack
		         Amateur Radio Station K6ACZ
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