[Boatanchors] Ballast tube for NC300/303

[Michael Tortorella]

Folks, I have a few 4HTF4 ballast tubes that are the 9-pin miniature version
of the 4H4C used in the National NC300 and NC303 receivers.  I checked with
Amperite that these are the same as the 4H4C, just in a different envelope.
If you want to try replacing a dead ballast tube, you'll need a standard
9-pin miniature socket for these.  They are brand new in the box.  Shipped
to your door for $8 each.  Can send a picture if you like.  Thanks for the
BW and 73 to all, Mike W2IY