[R-390] R-390A - Relay problems

[Barry]

>What you describe are the classic symptoms of the selenium relay rectifier
>failing open on one side. It is on the back panel to the left of the antenna
>relay. Replace it with a low voltage silicon bridge rectifier, and you will
>be back in business.
>
>Miles Anderson, K2CBY
>k2cby at optonline.net

Curious.  Do these rectifiers change as the radio reaches operating temerature or possibly over time?  He said it seems to work okay once the radio warms up.  Is it possible the relay itself is requiring less power as it warms up?  Just seems an odd set of symptoms.

Barry - N4BUQ