(2014-08-20, 16:15)billhoblit Wrote: Given that a) nearest power line, 100 meters, is at 7.2KV, b) nearest big line is several miles away (115KV)...No Problem
Quote:What is the ideal system: H- or E- ?Both
Quote:We are in a LOW interference area. What are the advantages/disadvantages?First, remember that no station is a stand alone station. The system is a network concept. Stroke data required from several stations. Otherwise you have a nice set of flashing lights and a buzzer to tell you that 'something electromagnetic' hit the antenna / probe.
E-field is more sensitive?
Some general very broad comments... Both have different characteristics and sensitivity to stroke parameters. Using both 5 channels of data vs 2 or 3. Possibility to expand stroke parameters with combo system (accuracy, type, polarity, etc). H field has slightly wider bandwidth.2 loop antennas, 2 channels. E field has very tight filtering, 3 bands, single E field probe 3 channels. E field less sensitive to H field Information and noise. E field 'simpler'--no fancy antenna...even a bottle cap can work. So sensitive that it's designed for shorter range, it could probably get signals from Jupiter if we could get VLF through the Ionosphere... long range generates many signals, therefore used for short range. H field generally for 'longer' range. Nearby cells more likely to induce 'interference' mode with H field. H field antennas in many cases can be inside. E field in most cases needs to be mounted outside well above ground, H field amp needs to be at antenna, with CAT5/6 shielded cable <10m to controller... E field amp can be right next to controller with Coax to the preamp/probe ... etc...etc...
Mike
