[Hammarlund] Hammarlund power ground

[Glen Zook]

For safety reasons you really need to replace any
2-wire power cords with 3-wire cords.  Connect the
green wire to the chassis.  This is for equipment that
uses a power transformer.  For AC/DC equipment you
need to do "other" things with the green wire.

If your house is wired correctly use of a polarized
plug definitely helps.  However, there are definitely
houses in which errors have been made in the wiring.

Use of a 3-wire cord in a house that is correctly
wired with 3-wire outlets will prevent any shock that
can happen when the equipment is "touched" when the
person is in contact with ground.  Also, if one of the
line bypass capacitors fails the potential for a shock
is greatly reduced (and should be completely
eliminated if the equipment is properly fused).

If you are using a 2-wire cord often the chassis has
as much as 60 volts AC on it (due to the line bypass
capacitors).  If the unit is plugged into the AC
outlet before you get a good ground on the chassis it
is possible to get a good "tickle" from this voltage.

Glen, K9STH


--- Mike Taylor <reel2reel at hotmail.com> wrote:

Hammarlund manuals say that if there is objectional
audio hum, reverse the two wire plug at the outlet.
I've never noticed any difference one way or the
other. Does this have anything akin to the use of a
two wire plug that's polarized? Also, what is the
difference between using a three wire plug with the
green wire connected to chassis, or connecting the "G"
terminal on the antenna input strip to a good earth
ground (copper rod driven into the earth or water pipe
connection)? Either way, your connected to earth, so
what's the difference?









Glen, K9STH

Website:  http://k9sth.com



 
____________________________________________________________________________________
Need Mail bonding?
Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users.
http://answers.yahoo.com/dir/?link=list&sid=396546091