Re: XT-12 Intelliscope Object Locator performance

You know a scope won't collimate well unless it
has a couple of dings on the tube.
Ben

Ever heard of dent tuning (in the waveguide business)? Hehee.
Errol

No. I've never heard of "dent tuning". What's it refer to?
Ben

Ben,

Whenever a system requires the transmission of high power (e.g. radar,
comm, etc.) high frequency RF radiation , a more effective/more
efficient means of transmission can be accomplished over the standard
transmissions line - coax, heliax... A waveguide can be employed.

A waveguide is essentially a hollow pipe, RF bandpass filter. A hollow
pipe that's diameter is manufactured to exacting dimensions depending
on the wavelength of the system's operating frequency.

The waveguide does not at as a conductor sort of speak, but acts to
create boundary conditions, to duct, or guide, the RF waves to their
destination, be it an antenna, receiver, whatever, from a transmiter,
whatever.

Like any transmission line, it can/will, when the waves encounter
imperfections in the waveguide (manufacturing defects, e.g. diameter
not consistent) develop impedance problems; take on capacitate or
inductive characteristics.

Since these characteristics were caused by a dimension imperfection at
a certain spot in the waveguide, it has been long joked by the old-
timers that they could find the exact spot where said error was
occurring, hit it with a hammer, and save the day. Wha-la, dent
tuning.

Recall that you said that the scope wouldn't collimate correctly until
it had a dent. Recall also that light is RF.

I know, it was pretty dry huh?

Errol

.

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