On 27/08/11 02:59, paul swed wrote:
Hi Brian good to hear the check arrived.
I will send pix if I cut it open.
Several comments
On Corby I am taking one final run at the original tube.
He helped me with a change I would need to make to try the one you sent.
By the way it pumped down just fine
Haven't figured the radioactive or not issue.
Regards and thanks.
Paul
WB8TSL
Paul,
The isotope of cesium used in atomic clocks is Cs133, which is
a naturally occurring, non-radioactive (stable) isotope.
You're probably thinking of the other isotope, Cs137, which is
famous for being an
Thanks everyone and indeed I mixed up 137 and 133. So that explains that.
The pictures are great I had never seen them before.
Plan to go back and look further at them. Though not sure I can magnify them
for a closer look. But will see what I can do.
Regards
Paul.
On Sat, Aug 27, 2011 at 10:45
On 8/27/11 7:45 AM, Tom Van Baak wrote:
I can't say the same for carbon (C14) or potassium (K40). See
http://en.wikipedia.org/wiki/Banana_equivalent_dose
Hmm, clocks based on the decay of C14 or K40... Definitely the other
end of the timing spectrum from picoseconds.
But think about
Hi Brian good to hear the check arrived.
I will send pix if I cut it open.
Several comments
On Corby I am taking one final run at the original tube.
He helped me with a change I would need to make to try the one you sent.
By the way it pumped down just fine with a 3500 volt supply. Thats amazing.
If any one wants pictures of the internal guts of a HP CBT I have two
decorating my window sill. One is the RF cavity of a high performance tube. I
can take some pictures and send them.
Bert
In a message dated 8/26/2011 9:00:31 P.M. Eastern Daylight Time,
paulsw...@gmail.com writes:
Hi
Bert sure I would love to see what they look like.
In all the various documents they only have drawings
On Fri, Aug 26, 2011 at 9:15 PM, ewkeh...@aol.com wrote:
If any one wants pictures of the internal guts of a HP CBT I have two
decorating my window sill. One is the RF cavity of a high
