Hi,
The 2.5 mH RFC is the commonist of chokes. It's called a PI-wound RFC, and
Mouser sells one, part #434-2250 for $2.53. This is a very uncritical
application just preventing any DC component to appear at the output
connector of your amp., and to act as smoke alert should the plate blocking
cap. ever fail.
73, Roy K6XK
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