Newbie and two questions
- Hi all,
New to this group and to VLF I want to introduce myself. I am 52
and "doing" visual astronomy now for a long time as well as
videoastronomy. As weather in Holland is often cloudy I am exploring
the frontiers of radioastronomy and came into VLF/ELF and Jupiter
receivers, which I find extremely interesting.
I have limited electronics knowledge but I am now researching
various VLF receivers and analyzing in PROTEUS (electronics program)
the various receivers, which gives me the well-known steep learning
curve. I made a modified BBB4-Rx with a 50 Hz (killer) - filter (on
the drawing board only). The headphone amplifier is in progress.
Now the question: I read about E-, B- and H-receivers. Can some
explain the simple difference and what the advantages and
disadvantages using those (with antenna's)?
- Hello Henk and welcome to this group
> Now the question: I read about E-, B- and H-receivers. Can someThe vertical E field (electric) antenna has a basically omni
> explain the simple difference and what the advantages and
> disadvantages using those (with antenna's)?
directional sensitivity. It is pretty sensitive and often easier to
build. A telescope antenna is the most practical for mobile equipment.
The terms B- and H-field receiver are usually meant to denote the same
thing, which means magnetic. The sensitivity has two minima in opposite
directions, which can be an advantage, if there is a well located
source of disturbing radiation.
At VLF frequencies the electric field and the magnetic field components
are largely independent of one another. Therefore it makes sense to
have both kinds of antennas (and the appropriate receivers) available
in order to get the best reception possible at any arbitrary location.