The first problem to solve.
Attic swl antenna balun construction.
Prior to our move i had been using and trying all kinds of indoor antennas since the early 60s.
The ge 33692 attic mount hd antenna is a notable example of an antenna specially designed for placement in the attic.
5 magnetic longwire balun see text at least 10 metres of.
I installed my first outdoor shortwave antenna a k a.
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.
The simplest multiband shortwave antenna for shortwave listening is probably the longwire for most newcomers to building antennas.
All told a friendly environment for an indoor swl antenna.
What a difference that made.
The shortwave antenna explained.
Loft attic antennas for restricted spaces m.
Shielded input from the antenna to the receiver using coax cable and a magnetic longwire balun mlb.
Mac af4ps fp 51 note.
Tf a compilation in the attic antennas 1.
This is an omnidirectional antenna design that is supposed to have more signal gain than a random wire.
Verticals and baluns.
Here are the possible solutions for each shortcoming that his attic shortwave antenna installation presents along with the recommendations i made to him.
Swl antenna back in the summer of 1971.
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.
We had moved from a city apartment to a house that had a big backyard.
I tried adding more wires to see if this made any further improvement.
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.
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.
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.
Poor insulation of the attic shortwave antenna wire.
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.
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.
Here are some ideas about an in the attic antenna.
Magnetic longwire baluns mlb are foundin the section stuff you can use.
Groundplane verticals they are generally end fed 1 4 wave radiators.
Transforming the attic random wire antenna to a loop.
