The "shelf life" referred to is only related to tube vacuum without pumping occasionally.
It was derived from an estimate of how badly a worst case tube would leak. Most tubes have an almost perfect vacuum seal and this "shelf life" is indefinite. Leaving a 5061A/B on and in the Cs-off mode keeps the ion pump on. The actual life of a continuously working tube is conservatively estimated by the warranty lengths HP assigned to the various tube styles. Cheers, Corby _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to https://lists.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
