In Reply to: RE: It's almost a crude crystal radio but the tuning portion is connected wrong.... posted by Eli Duttman on January 16, 2017 at 00:08:12:
You can protect this with a GDT - which are about $4 in qty 1 from Mouser.
These guys are mini versions of the OB2 OA2 glow regulators.... They conduct around 90V or so, so your FET needs to have a gate breakdown voltage above that....
Another longwire protection device is a simple neon lamp....
-- Jim
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Follow Ups
- RE: It's almost a crude crystal radio but the tuning portion is connected wrong.... - Jim Doyle 20:03:18 02/10/17 (0)