High Q in lightning detector circuit

[wolf9545]

Sorry if this has been asked before, didn't come up with anything on the search.

I would like to build the lightning detector circuit shown here, Lightning Detectors, and I see that he recommends a high Q choke. What would a high Q number be? I was looking at this, MICC/N-102J-00 Fastron RF Inductors, and I didn't know if 60 was a high value or not.

 

[JimB]

A Q of 60 is not all that high, but should be OK for that application.

JimB

 

[Jaguarjoe]

In one sentence the guy says there's a 270k resistor across the chokes to spoil the Q, later he says to use moderately hi Q chokes.

The 1st time I built a lightening detector was 45 years ago. I don't think all lightening tunes itself to 300kHZ so I don't think Q is a show stopper.

 

[BrownOut]

Well, he said moderately high, and 60 should qualify.

 

[wolf9545]

Thank you. I just didn't want to spend $1.40 on a part when I could have spent $0.15 on an item and bought a few more. I know some electronics, took a few years in colleges of electronics classes but no electrical engineering. but not much about coils / chokes. Is there a good book to have (something like you would get in school and it would tell you about the different items?

 

[Jaguarjoe]

The Art of Electronics by Paul Horowitz and Winfield Hill is a 1200 page book filled lots of good information explained in a real easy going way. The paper back version from eBay that's printed in India is pretty cheap. My only complaint is that the newer op-amps and uC's are not in it, but all of the basic stuff is all the same anyhow.