[Amps] Plate choke explodes

[Bill Turner]

ORIGINAL MESSAGE (may be snipped): 
On Fri, 12 Apr 2013 15:03:06 -0400, you wrote:

>It was an Ohmite Z-50 choke that exploded the first time.  That's what Orr
>Radio Handbook 23rd edition uses on its 6m amp.

REPLY: 
I remember the Ohmite Z-series chokes. That are effective chokes precisely
because they are self-resonant around the frequency of their nomenclature,
i.e, Z-50 = 50 MHz. 
 
They are ok for filtering RF but they are the LAST thing you want to use for
a plate choke in a pi network output circuit. 

I can't believe Mr Orr would use one for a plate choke except maybe in a
very QRP rig. Smoke time. 

Bill, W6WRT