Using the amplifier only

[cutty]

Detecting lightning within a certain radius of a location, with a single receiver, is almost impossible.

Lie!
Boltek's are single receiver's, and for beeing that and taking that in act, damn accurate if they are calibrated correctly
Not accurate as BO but one can't compare apples with oranges either, BO and Boltek works in totally different way.

// Henkka

Also there's quite a price difference, and I'd sure claim more friends worldwide with similar interests in Blitzortung! And BO is non-commercial, and not chasing the almighty dollar (Euro, Peso, Pound, Lira, etc)... perhaps the only negative to BO is a set of overworked, well respected developers, who are taking a well deserved vacation at the moment, from a 'spring time' of unexpected publicity and product requests... . What a year 2015 will be!