Ramsey Electronics BS1 Manual de Instruções descarregar pdf (Página 9)

SG7• 9

ASSEMBLING THE 2-CONDUCTOR SIGNAL CABLE:

Your SG7 kit includes two plugs and a length of 2-conductor shielded cable

for making the custom cable connect the Speed Readout Unit to the

Microstrip Oscillator. Assembly of this cable is a good warm-up job and its

nice to have it ready when it's time to do our serious testing.

While making up this cable will be a very obvious procedure for many

builders, here are some hints for those who will appreciate them:

 1. Once the outer shell is screwed onto a plug, it may look good but any

bad work will be completely hidden - and will begin to cause problems

right away.

 2. The most common cause of problems in computer and ham radio

station installations are merely bad cable assemblies, whether RF coax,

ribbon cables or audio cables.

 3. If you did an especially great wire-stripping and soldering job on the

plug, there's an even greater chance that you forgot to slip the outer

shell on the cable before soldering.

 4. The causes of faulty cable assemblies are these:

•

Too much exposed wire, which gets bunched up against another

connection AFTER the shell is screwed on.

•

Stray strands of wire.

•

Mixed up conductors.

Armed with that much wisdom from other folk's headaches, the following

steps should now make a little more sense to you:

 1. Slip the shells of BOTH plugs on the cable, making sure that they are

pointed correctly.

 2. Strip the MINIMUM of insulation needed from each end to make a

clean, unstressed connection. That means NO excess wire that doesn't

know where to go when the shell is put on.

 3. The shield, which may either be braided or a bare wire in contact with

a foil shield, is soldered to the same longer lug which clamps around the

cable for mechanical strength.

 4. The insulation colors of the two conductors may vary. All that is really

important is that the same color of wire goes to the SAME solder point

on BOTH plugs.

 5. Be SURE after all soldering that there are no stray wire strands and

no excess bare wire that can be pushed against another connection

when the shell is screwed on.

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Ramsey Electronics BS1 Manual de Instruções Página 9