[R-390] ballast tubes

[Dave Merrill]

Amperite lists them as available, but when you call a distributor
they quote you over $100 per ballast.

>I notice according to Amperite website's  section on Amperite Ballast
tubes<http://www.amperite.com/Uploads/Ballasts.pdf> (PDF) they still have
the following ballast tubes in stock.
>3TF7, 3TF7A, 3TF7B, 3TF7H.  There was another site I have not  re
discovered which is devoted to the restoration of tube
>type guitar amp's.  Many of these amp's used ballast tubes.  One of the
sites had the calculations for a substitution using an small 
>incandescent light bulb and a resister for the a ballast tube. I am still
looking......