fjpompeo
Advanced Member level 1
FET crowbar circuit
Hi all,
I need a crowbar to protect my HAM rig so was thinking to use the classic SCR+ZENER but looking ahead this circuit is very sensitive to RF then a prefer something more accurate like a voltage comparator (e.g. LM311 refered with TL431) driving a power MOSFET instead of a SCR. Is there any problem?
Thanks,
Fernando
Hi all,
I need a crowbar to protect my HAM rig so was thinking to use the classic SCR+ZENER but looking ahead this circuit is very sensitive to RF then a prefer something more accurate like a voltage comparator (e.g. LM311 refered with TL431) driving a power MOSFET instead of a SCR. Is there any problem?
Thanks,
Fernando