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eHam Forums / Elmers / Dipole antenna tuning question
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on: May 08, 2002, 09:19:04 AM
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This is off topic so I will keep it short.
Electrical contractors/engineers in one part of the country do not speak differently from those in other parts. This is very important because we all have to abide by the National Electrical Code and everyone’s understanding of the code has to be the same. So when I read the code in California I have the same interpretation as someone in Maine. The definition of words and terms is considered of great importance and the code defines each. Everyone other than the unlicensed handyman electrician abides by all of these definitions. With all due respect to AC5E everything he has had to say on this subject is totally erroneous. This is my last comment, lets get back to antennas.
Best
Art
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eHam Forums / Elmers / Dipole antenna tuning question
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on: May 07, 2002, 06:58:16 AM
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You can use just about anything to feed a dipole, I have even used zip (lamp) cord but the best is the standard RG-58 or RG-8 (RG-213 etc) series of lines that are the undisputed winners. You will NEVER see a professional antenna installer using anything from Radio Shack. Belden is ALWAYS the preferred source.
Anything put between the rig and the antenna will dissipate power so the less you have the better. This includes, antenna switches, relays, baluns, antenna tuners etc. The very best way to feed the dipole is direct with RG whatever and cut the antenna for proper resonance as suggested by AE7G. Also better than an attic antenna is an invisible outdoor antenna which can be a fun challenge. I at one time was in a restricted antenna area and made an outside inverted V all from bare #22 copper which included the feeder.
Before retiring I owned and operated an electrical contracting firm and I have never heard of a pole pig nor is the name listed in the National Electrical Code, American Electricians Handbook or the Standard Handbook for Electrical Engineers. The wires from a service pole to a home or building is always referred to as the service drop. The wiring from the electrical service panel to lights, plugs, stoves, heat pumps, etc are always branch circuits or feeders.
Best
Art
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eHam Forums / Elmers / Dipole antenna tuning question
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on: May 06, 2002, 07:07:54 PM
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First RG-6 or any foam coax is a poor choice for transmitting because of its low voltage breakdown as compared to RG-58 or RG-8. I would recommend going to RG-58 and use a tuner if necessary. Also using a balun is controversial. They soak up power and have never been proven necessary. As for the electrical service panel in the attic, you are using the wrong words. A service panel has the utility power meter attached and are never found in an attic. However if the antenna passes an electrical line at a 90 degree angle there should be no problem. Please contact me if you have any futher questions.
Art wa6ipd at nctimes dot net
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eHam Forums / Elmers / icom746+amertron 811a amplifier
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on: December 23, 2001, 07:03:58 AM
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ALWAYS use an external relay unless you are comfortable with repairing transceivers. Any short circuit in the keying line to the transceiver will make you wish you had the protection of an external relay. Make sure you install a diode across the coil, this will prevent an inductive high voltage kick back. I use two diodes one across the coil another in series on an IC-756 and AL-811.
73s Art
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