[Amps] Plate choke explodes

[Eddy Swynar]

On 2013-04-12, at 9:07 AM, Drax Felton wrote:

> 
>> 
>> So I've tried two different plate choke designs on my 6 meter 8877 amp I'm trying to build.   Both times the plate chokes have violently exploded as soon  as I apply 5 watt or less RF input to the amp.
>> 
>> Any ideas what I did wrong? 
>> 


Hi Drax,

Sounds like a classic case of "resonant  plate choke" to me...

Did you ever couple the choke to a grid dip meter beforehand, to see where its natural resonance(s) may have been...? Most likely there was one right in the middle of 6-meters someplace, for it to have self-destructed so violently...

~73~ de Eddy VE3CUI - VE3XZ