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Antenna Modeling for Beginners Feb 8th 2013, 18:19 3 1,712 on 14/2/13
Roller Inductor Tuner Dec 20th 2011, 19:26 1 1,548 on 20/12/11
Using Ladder Line Jul 27th 2011, 19:43 3 2,619 on 29/7/11

Latest Posts

Topic Author Posted On
coax SIZE358 1 week, 1 day ago
Wrapping the outside of the cable with foil can create additional paths for current to flow on the outside of the foil. The foil shield and the braid need to be in contact with each other to achieve better shielding than using either foil or braid alone. However, a cable of foil and braid shield is not recommended for use in duplex systems such as a repeater or connections between the repeater and duplexer. A better cable would be a double braid shield such as RG214 or RG142.
Repeater question K9DBX 2 weeks, 4 days ago
Some satellites also use different bands for uplink and downlink (VHF/UHF).
Dipole on roof AG5AL 2 weeks, 6 days ago
I have found that keeping the ladder line at least 4 times the width of the ladder from all materials (especially metal sheathing) is usually sufficient to keep them from interacting with each other. Stand-offs are available or you can make them out of plastic pipe sold in most hardware stores.
Net Check-in Validity AD6FC 2 weeks, 6 days ago
I would agree that the purpose of the net is to check out your equipment, your ability to operate, and your ability to reach net control. Having someone else check you in defeats that purpose. Early and late check in's are taken at the digression of net control. Being on time for the net is part of the discipline of belonging to the net. (your mileage may vary)
Yaesu VX-8DR TX restriction outside 430-450 KK6OXU on 15/8/15
But only if those radios have the FCC part 95.191 for FRS and 95.631(j) for MURS certification.

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