[Amps] What to do about 'Neutral' in HB amp?

[gudguyham at aol.com]

Do not use a chassis ground to connect any 120v neutral loads.  Period.  Chassis ( connected to green or bare branch circuit wires) should only carry fault currents NOT normal operating currents.  Old Henry amps when switching from 120 to 240 operation want a separate neutral connection requiring a separate white wire that most 240v dedicated branch circuits don’t have.  If you have an old Henry, when switching to 240 without the required neutral available you simply add a jumper to the terminal strip that ties the primaries together to the terminal looking for the neutral.  That makes everything happy and is safe and legal.  Do not ground that terminal looking for neutral!  They do not show this in the manual.  If you have the neutral wire available by all means use it but when not available the jumper to the primary jumper is the thing to do.  

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On Wednesday, December 28, 2022, 7:46 PM, Jim <jimw7ry at gmail.com> wrote:

Oh... And bandwidth limits are SOOOOOO 1990s Bob...  Top posting? Just 
like everyone else does here?

Got it.

Thanks, 73, Jim W7RY

On 12/28/2022 6:30 PM, Robert W5AJ wrote:
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>
> 73
>
> On Wed, Dec 28, 2022 at 6:26 PM Jim <jimw7ry at gmail.com> wrote:
>
>
>    Thanks, 73, Jim W7RY
>
>    On 12/28/2022 5:29 PM, n4is at comcast.net wrote:
>    >
>    > Whats a catch 22?
>    >
>    > You need to connect the Amp chassis to the AC neutral (wire
>    connected to the
>    > ground at the AC entrance), and you need to connect the Amp
>    chassis to the
>    > ground of the station, at same time, the  ground of the station
>    need to be
>    > connected to the AC ground at the entrance. All neutral wires
>    must be
>    > connected to only one point!
>    >
>    > You cannot do both at the same time.
>    >
>    > If you don't isolate the AC house ground from the station
>    ground, also
>    > neutral, because it is also connected at the AC entrance, you
>    end up with a
>    > UNSAFE ground. RF can flow to the house, EMF generate currents
>    on both wires
>    > and you want the current to the ground, not to your house. It is
>    a mess.
>
>    > Neutral or ground are two names for the same thing,
>
>
>    Wrong. They are separate conductors, only being common at the primary
>    service disconnect.
>
>    I'm out...
>
>    Jim W7RY
>
>
>    >   a wire from the chassis
>    > to a bar on the ground. But!  The functionality is different,
>    neutral is for
>    > human safety, ground wire is low impedance path to the actual
>    ground. A long
>    > ground wire for the station is a problem, 10 ft long can became
>    an antenna
>    > for 28 MHz, a long neutral wire is not a problems, it works for
>    safety, if
>    > no current flow on it, no load.
>    >
>    > 73's
>    > JC
>    > N4IS
>    >
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