Oh yes and guess which tubes we find? The 40 year olds at ham prices. :-) At least thats what I have. Like your comment as so far what I have learned is that seems like other things going on. I sort of believe its C pollution of things like the ionizer and even the photo tube elements over time. Its a curiosity without much of a way to prove it.
Regards Paul WB8TSL On Wed, Nov 2, 2016 at 10:53 AM, Richard (Rick) Karlquist < [email protected]> wrote: > This has probably been covered here before, but, at least going > to the 5071A, now 25 years ago!, all CBT's, whether high > performance or not, have the same amount of cesium inside. > This means that the standard performance (never call it > "low" performance) CBT has enough cesium to last 30 years! > Thus for those tubes, we can rule out cesium replenishment > even if it were possible. > > Rick > > > On 11/1/2016 8:38 PM, Mark Sims wrote: > >> You mean I can't just drill a hole in, wash out the old cesium with some >> tap water ;-), toss in some new cesium, suck out the air, bung a cork in >> the hole, and call it a day? Drat! foiled again... >> >> --------------- >> >> Because it's not that easy. We are talking about a high vacuum system >>> here. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/m >> ailman/listinfo/time-nuts >> and follow the instructions there. >> >> >> _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
