[R-390] What is the difference between 390 and 390A

[Flowertime01 at wmconnect.com]

For just AM short-wave I like my Grunow 7NB. I do cheat and use a 6 volt 
power supply instead of the lead acid battery. Once a year you need to get it out 
of the wood cabinet and change the two bias batteries under the chassis. The 
original batteries for the bias are no longer available, but you can get some 
good stuff from radio shack that almost fits right in. Of course its been 
recapped. re tubed. cabinet refinished. Chassis refinished. Love the slop and lash 
in the tuning dial.

It almost glows in the dark. Early 6 volt tube filaments just do not glow 
like a good 6082 series regulator tube.

Roger KC6TRU