On 3/19/24 18:09, Robin Szemeti via Emc-users wrote:
TWT's are still widely used for satellite uplinks ... a typical broadcast
uplink will be a pair of 400W tubes at around 14GHz .. one running to the
antenna, one running to a dummy load, ready for instant changeover. The
bigger tubes will
TWT's are still widely used for satellite uplinks ... a typical broadcast
uplink will be a pair of 400W tubes at around 14GHz .. one running to the
antenna, one running to a dummy load, ready for instant changeover. The
bigger tubes will run 750W.. There are no affordable solid state devices at
We had some training on traveling wave amplifier tubes, referred to as TWAT
tubes back in Nike Hercules tech school in 1977.
Dave
ex MOS 22L
On Tue, Mar 19, 2024 at 4:35 PM gene heskett wrote:
> On 3/19/24 14:15, Robin Szemeti via Emc-users wrote:
> > I purchased a couple of large travelling
On 3/19/24 14:15, Robin Szemeti via Emc-users wrote:
I purchased a couple of large travelling wave tube amplifiers in an
auction. I phoned the US company to ask about schematics and a manual ...
"can we have the serial numbers please?" ... "sure ... " "great and what
date did you sign the ITAR
The mining industry uses these washer stacks to secure replaceable wear
plates in Jaw crushers. Twist the nut down until the compressed washers
all fit into a “cup” and viola bolt is torqued and the bolt has additional
springiness beyond just the steel of the bolt
I would agree with Todd
And Mouser! Black list mouser as they sell all sorts of high power
MOSFETS and IGBTS that could be used to construct drives for the same
purpose. And all non ferrous metals stock holders ... they sell brass and
bronze that could be used for the bearings, have they no shame?
On Tue, 19 Mar 2024
I purchased a couple of large travelling wave tube amplifiers in an
auction. I phoned the US company to ask about schematics and a manual ...
"can we have the serial numbers please?" ... "sure ... " "great and what
date did you sign the ITAR agreement?"
On Mon, 18 Mar 2024 at 17:45, gene
On 3/19/24 11:19, Dave Engvall wrote:
Indeed, using drive dog threaded holes. Initially I did think about a flat disc
but cannot see that gives me
any better holding strength than the dogs with a slight tee on top so one
gets both drive and cat40 retention.
The other problem is keeping the
I think I'd rather just fix the washer stack/clamping issue. Repeatable, easy
tool changes is so worth the effort.
Todd Zuercher
P. Graham Dunn Inc.
630 Henry Street
Dalton, Ohio 44618
Phone: (330)828-2105ext. 2031
-Original Message-
From: Dave Engvall
Sent: Tuesday, March 19, 2024
Indeed, using drive dog threaded holes. Initially I did think about a flat disc
but cannot see that gives me
any better holding strength than the dogs with a slight tee on top so one gets
both drive and cat40 retention.
The other problem is keeping the spindle from rotating while I torque
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