You can always work out an NDA with the manufacture and then get the exact
blueprint of the item in question to help you to get the measurement you
need.
-Mark
________________________________
From: Clinton M. [mailto:[EMAIL PROTECTED]
Sent: Sunday, October 17, 2004 5:05 PM
To: [EMAIL PROTECTED]
Subject: [wirelesslan] Trevor Marshall Slotted Waveguide Questions:
Dimensions?
Good afternoon group,
I've been reading a lot, trying to determine the best
configuration for a community/area WLAN and feel the Trevor Marshall designed
32 slot waveguide will play a large role, since the omni-directional nature
of the design seems to make it ideal to connect to a meshap box.
My questions about this design are:
A) ~Primary Concern~ I cannot locate certain critical measurements
in the 32slot waveguide design, and I am ready (have 12mm bits, files, and a
machine shop ready lined up) to go as soon as I determine these dimensions
and can scribe/score the aluminum stock.
1) Is the centerline of the N-Connector 40.8mm from the outside of
the aluminum tubing or from the inside of the tubing?
2) Is the centerline of the N-Connector also the outside line of
the first slot?
3) Is the inside of the first slot also the inside of the next
(alternating) slot? Do all the slots share the same centerline?
4) Some of the other dimensions from the lower end of the
waveguide also raise questions about the measuring conventions used... like
the vertical distance of the N-connector from the bottom of the air column?
And according to the drawing... the overall measurement (length) of the air
column *appears* to use the outside dimension measurement from the top and
the inside dimension measurement at the bottom... am I seeing these
correctly?
B) ~Next Concern~ What do the "wings" refer to?. (two sets of
"wings (one set at each slot surface) are required to get equal radiation of
energy over a full 360 degrees.)
Maybe it's just my vision/interpretation of the drawing, but I am not
clear on these and do not want to ruin the tubing already bought and waste
the time of the machine shop until I know for sure.
Please let me know if there are questions of mine which are not
clear... I would be grateful for any help or direction.
Thank you and best regards,
Clinton Meyer
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