[Amps] What is a 4CX3000A...+ EI ?

K8RI k8ri at rogerhalstead.com
Fri Oct 14 11:58:24 PDT 2011

I know what a 4CX3000A1 and A7 are, but what does the +EI stand for? Is 
that a one or the letter "I"?
I've never seen the designation given like that before.


Roger (K8RI)

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