RE: Toroid cores for GDTs

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Steve Conner <steve@xxxxxxxxxxxx>


> I am a bit surprised that the ones you showed are that much better 
> since the design looks identical except for the mounting base.

Hey Skip,

You're dead right, the LSE transformer looks identical to one of our 
home-built GDTs. I don't know why they measure so differently- maybe 
James's inductance bridge was over-optimistic or something?

Or maybe LSE's inductance meter couldn't measure anything smaller 
than 0.47uH ;-) It does seem very high considering the geometry of 
the thing: my 10" single turn OLTC primary was 0.60uH, and I don't 
see any 10" loops of wire dangling out of that GDT.

Steve Conner
http://www.scopeboy.com/