[R-390] Ballast Auction Warning

[roy.morgan at nist.gov]

Quoting Barry <n4buq at knology.net>:

> Just a warning:  The eBay item number 230172418615 is advertised as a
> ballast tube for the R390A and it isn't.  As far as I know, the 3TF4 is not
> an acceptable substitute for a 3TF7.

Barry,

You are correct that the 3TF4 will not do where a 3TF7 is needed.

Roy


Roy Morgan
13033 Downey Mill Road
Lovettsville VA 20180