Transmit With Scanner Antenna

• Base Scanner Antennas For Distance
• Transmit With Scanner Antenna System

So the might be. way too large for my property.Is there another simple, cheap, DIY antenna I could try on my receiver? I know I'm going to want to hook it up and have a listen before the last solder joint has cooled. Ideally it would cover 160 m to 10 m reasonably well.The most complicated antenna I've built was a Gray Hoverman for UHF reception. It would be nice if it weren't much more complex, but if it's inexpensive and good enough I'm willing to do a bit of work for an antenna I'll use a long time.I'm not interested in aiming right now, so an omnidirectional antenna would be best. I do have a 25' attic I can use if needed. Is almost certainly.

Base Scanner Antennas For Distance

Austin Ferret Base Scanner Antenna product reviews by real people like you. Only at eHam.net. eHam.net is a Web site dedicated to ham radio (amateur radio).

Receive antennas are the easiest thing ever. You just need two things:. something that conducts electricity.

another thing that conducts electricityAttach one to the center contact on a BNC connector. Connect another to the shield. If you can't find two things, then one can be the Earth.Alternately, you can use two ends of one thing that encircles something that permits magnetic fields (like, air).Until you are approaching a significant fraction of a wavelength (like, 1/4 wavelength), then making either thing bigger will get you more signal. However, once you have enough signal that you are well above your receiver's noise floor, more signal won't make you receive any better: it will just give you louder noise. I'd say, however much space you have, make it that big.Don't worry about tuning, or impedance matching. This also will increase the fraction of the energy received by your antenna coupled to the receiver, but again, once you have enough to overcome the receiver's noise, more is of absolutely no help. SeeDon't worry about polarization.

At HF most of your signals will arrive via the ionosphere which is constantly swirling and changing the polarization of received signals. Whatever polarization you pick, it will be the wrong one in 30 seconds, so don't worry about it.If you really must worry about something, worry about getting your antenna away from noise sources. Your house, being full of all varieties of noisy digital electronics, is very noisy. If you can get an antenna away from these things, that's good. You must also take care to avoid making the feedline part of the antenna. See Although that question asks about resonant dipoles, the answers apply to any type of antenna.

There is nothing simpler than a random length wire. It doesn't have to be strung up or even straight, though, obviously, those would improve it's performance. Of course the ironic thing about a random length wire antenna is that the most effective lengths aren't actually random.

They work best when the antenna is at least a quarter wavelength at the lowest operating frequency, 65' for 80m, for instance.To maximize the effectiveness, and have something useful down the line, you could build a small tuner. An L-network random wire tuner is probably the simplest matching network in existence, designs about on the net. Like this one: or this one:. I'd say, if you plan on putting it in the attic /loft, then figure out where your wiring is, and in what orientations, and let that dictate the size and orientation of your antenna.

Smaller might be better if it means you avoid closer interactions with noisy wiring.Most of my wiring runs horizontally EW along the loft and vertically down the house, and my lowest noise loft antenna was NS along the inside of the roof (actually at a diagonal) therfore at eight angles to most of the closest wiring.I put a horizontal wire in the garden and it picks up more local noise, probably due to orientation relative wiring in to the houses around.and the huge number of dishwashers and washing machines generating the noise.My property is small. All my antennas are tuned or loaded. The best receive I eve had though is on a small tuned loop.

You can null out a particular source of noise, and it's pretty narrow bandwidth. You can make one out of cheap stuff if you're not planning to transmit.

It is very easy to create a simple 1/2 wave dipole, all you need is some lengths of wire such as the core of some mains flex or even a straightened out metal coat hanger, some co-ax cable and a connector for your scanners antenna input (usually BNC or SMA).The formula to calculate the length of the antenna is 147/frequency in MHz, this gives the total length of the dipole in metres. For example, to make a 150MHz dipole: 147/150 = 98cm so each element of the dipole should be 49cmConnect one end of each cut wire to one side of a piece of choc block and to the other sides connect the core and shield of a length of 75 ohm co-ax. Put a suitable connector for your scanner onto the other end of the co-ax and hang the antenna in a suitable position with the element that is connected to the center core of the co-ax pointing upwards.The balanced 75 ohm impedance of a dipole should really be matched to the unbalanced impedance of the co-ax using a balun but this is not as important for receiving only as it would be for transmitting. The mismatch will degrade the performance a little as it will reduce the overall sensitivity and possibly allow the co-ax feeder to act as an antenna and pick up some noise generated from within the building (eg.

A standard Di-Pole (not off-centered!) is 75 ohm impedance. Your radio is 50 ohm. This means you need a 1.5:1 balun or a choke.

However, I’ve read elsewhere that care must be taken when using baluns on certain types of di-poles (primarily off centered di-poles) when operating on the 2nd harmonic (eg. 40 meters on a 80 meter di-pole!), so you may want to double check that before using a balun.

In either case, when calculating the frequency for the di-pole, one generally picks a frequency that is exactly halfway down the band they are wanting to build the antenna for. Some bands (higher in frequency) are too hard to tune for the entire band, so its best to pick the portion of the band you will use most, then use a tuner to get the rest of the band.

Transmit With Scanner Antenna System

6 meters is an excellent example of that!.