Ramsey Electronics BS1 Manual de instrucciones descargar pdf (Pagina 27)

SG7• 27

MAKING THE METAL RADAR ANTENNA HOUSING:

"What??? I paid all this money for an electronics kit and I'm now expected to

solder some tin cans?"

Leaving this particular phase of building Speedy to your own craftsmanship is

the only possible way we can bring you this kit project so inexpensively. How

else, aside from using the common metal can, will we get a perfectly round

metal tube with one end completely closed in? Of course, if precision sheet

metal work is your craft or hobby, you can make a housing to suit your own

standards which would be beyond what is possible for most other people.

The standard SG7 design is based on using two 1-pound (or 13 oz.) coffee

cans. But, now that coffee is being packaged in just about everything else

except the classic 1-pound can, we have compiled the following list of

alternative can combinations.

DESCRIPTION (All diameters = 3.875"): TOTAL LENGTH

1 1-pound ("13 oz") coffee can 11"

2 40-ounce food cans 13"

1 ea. coffee can and 40-oz. can 12"

1 ea. 40 oz. food can and 28-oz food can 11"

The can combination that has received long-term testing in a number of

different units is the original coffee can combination. A rule of thumb is that

the longer the completed can assembly, the sharper the focus of the radar

gun, meaning that it has to be pointed more directly. An advantage of the 40

oz. and 28 oz. food cans is that they are generally bare metal with easily

removed paper labels, making soldering and finishing that much easier. The

40 oz. cans are used typically for precooked pasta and bean products, while

the 28 oz. cans are used for fruits and vegetables. Please use one of the can

combinations recommended above, because we have no data to support the

feasibility of other size cans.

SOLDERING THE CANS TOGETHER:

A neat seam around the joint of the two metal cans will contribute to the good

looks of your finished Speedy. A solid seam is needed for proper performance

and range. These are the steps for making a good solder seam:

 1. Clean both can rims thoroughly with a wire brush or other abrasive tool.

Do this VERY THOROUGHLY!

 2. Carefully remove any small dents (or get another can).

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Ramsey Electronics BS1 Manual de instrucciones Pagina 27