[R-390] Intermittent

[Jim Haynes]

On Fri, 13 Nov 2009, Gary Harmon wrote:

> My R-390 has intermittent signals.
>
> Sometimes broadcast will come on in about a minute and then operate for
> hours before the signal drops out.  It may come back or it may not.  When it
> drops out or comes on it does it slowly like something turning on or off.
> When the signal drops out, audio hiss remains.
>
The way you say it drops out or comes in slowly suggests there might be
a tube with the heater circuit going out.  So when the signal fades away
look at all the tubes to see if any are unlit.