On 9 Sep 2019 at 2:46, Hubert Miller wrote: > Ken, are you sure it's not "Special Low Radiation" ? No. I am NOT sure. Ha ha! :-) I think you are correct, Hugh. Anyway, the ending F, R, M, etc, stood for Scott's own way of covering the various models. I never did understand their cataloging of it. Ken W7EKB