[R-390] R-390a Stability Specifications

[Tony Angerame]

Group,

>From a cold start how far should an R-390a drift? I have a cool basement shack (60F) so it takes a good houtr to warm up to operating temperature, maybe longer. In that time it drifts almost 1 kc. So that's a rise of about 60 degrees or more. After that well I can't notice much change. I seem to remember maintenance in USAF replacing a receiver but it took a while for it to stabilize. But that's becoming a fuzzy memory.


Thanks,



Tony WA6LZH