Attila, The precision on the cavity itself does not need to be so tight as a mechanical tuning plunger takes up the initial tuning slack.
The varactor tuning covers more than 10Khz This cavity is held at approx. 50 degrees C. The collimator for an active maser is a bundle of MANY hollow glass tubes that have been stretched by a glassblower to reduce the diameter of the holes to very tiny size. Takes an expert! For a passive maser a smaller number of tubes with larger teflon coated holes can be used. On the output of either style either a quadrapole or hexapole permanent magnet assy. is used to focus the beam. Tom VanBaak is going to host the manuals on his Leap Second website. I'll post on time nuts once they are there! Corby ____________________________________________________________ Obama Urges Homeowners to Refinance If you owe under $729k you probably qualify for Obama's Refi Program http://thirdpartyoffers.juno.com/TGL3141/4c7d42e9281c7d9274m04duc _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.