XPost: rec.radio.amateur.equipment, rec.radio.info
The DXZone.com Amateur Radio Internet Guide
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Corned Fed Delta Loop
Posted:
https://www.dxzone.com/dx34878/corned-fed-delta-loop.html
Antennas/Delta loop
Author found a ratio between the lengths of the sides of the Delta Loop
that give reasonably low SWR into a 50 ohm coaxial cable almost independent
of the high above ground and other surroundings. This ratio also gives good results no matter orientation. Includes an online delta loop antenna calculator.
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IC-7300 Bluetooth Support
Posted:
https://www.dxzone.com/dx34877/ic-7300-bluetooth-support.html
Radio Equipment/HF Transceivers/Icom IC-7300
It is possible to add a very small Bluetooth transmitter to the 3.5mm
headphone jack and then use a pair of Bluetooth headphones around the
shack. In this article Author provides some tips on choosing the proper Bluetooth interface.
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The Quarter-wave stub
Posted:
https://www.dxzone.com/dx34876/the-quarter-wave-stub.html
Antennas/Feed Lines/Coax Stubs
The Quarter-wave stub can be used for many purposes. If it is left with an
open end it can be used as a notch filter to attenuate certain frequencies.
A quarter wave length of a transmission line can also be used as an
impedance transformer, to know more about the Quarter-wave impedance transformer
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