This antenna has all the reception power of an outdoor antenna but features a curved metal frame of reflectors that are designed for fitting easily into smaller attic spaces.
Attic swl antenna balun construction.
Magnetic longwire baluns mlb are foundin the section stuff you can use.
What a difference that made.
It is literally a random long length of wire stretched out from the shortwave receiver antenna connection and attached with some form of an insulator on the opposite end.
Transforming the attic random wire antenna to a loop.
The simplest multiband shortwave antenna for shortwave listening is probably the longwire for most newcomers to building antennas.
Here are some ideas about an in the attic antenna.
Shielded input from the antenna to the receiver using coax cable and a magnetic longwire balun mlb.
The shortwave antenna explained.
The infamous attic dipole.
The better your antenna the more success you will have making contacts.
Poor insulation of the attic shortwave antenna wire.
This antenna spans a tuning range spanning 3 5 mhz through 40 mhz and thus covers 80 10 meters on the amateur radio bands all international shortwave bands plus the 11 meter cb bands.
We had moved from a city apartment to a house that had a big backyard.
Swl antenna back in the summer of 1971.
This was installed at a previous qth i will be the first or millionth remember i m from fl to affirm that the antenna is the determining factor for success when it comes to one s station set up.
All told a friendly environment for an indoor swl antenna.
I installed my first outdoor shortwave antenna a k a.
The antenna comes with a 3 coaxial cable to attach the antenna bnc output to a so 259 pl 259 input of your receiver most receivers.
I tried adding more wires to see if this made any further improvement.
Groundplane verticals they are generally end fed 1 4 wave radiators.
Technically a true longwire needs to be at least one wavelength long but hams commonly call any end fed wire a longwire or random wire antenna.
This is an omnidirectional antenna design that is supposed to have more signal gain than a random wire.
5 magnetic longwire balun see text at least 10 metres of.
The first problem to solve.
Verticals and baluns.
The ge 33692 attic mount hd antenna is a notable example of an antenna specially designed for placement in the attic.
Here are the possible solutions for each shortcoming that his attic shortwave antenna installation presents along with the recommendations i made to him.
Satisfactory to use a 1 1 balun 12 bifilar turns on 4 stacked ft240 61 cores see next section on page so that there was less loss when operating into the low resistive component of the antenna input on 80m.
Prior to our move i had been using and trying all kinds of indoor antennas since the early 60s.
His shortwave receiver is a yaesu frg 8800.
