[AMRadio] Grounds (was AM Amps)


Mike Dorworth K4XM k4xm at arczip.com
Thu Jan 13 13:54:52 EST 2005


Since we are talking safety and AM radio, as a more than fifty year ham let
me tell you that the below stuff is true. Also remember: Turn off the b plus
when neutralizing a pair of 813..ask me how I know...DO not jump out the
interlocks on a BC610 then turn of the external VFO, then after observing
all meter on zero adjust the antenna link.(2500 volt supply under load
becomes 4000 VDC!). Happened in 1957, still have hole in finger and wrist
bone.. good news, it only took six weeks in the sling.. Things like shorting
sticks, wires across oil filled capacitors months after last use are
timeless advice that means STAY ALIVE if possible.. 73. Mike K4XM


----- Original Message ----- 
From: "Tom Norris" <r390a at bellsouth.net>
To: <amradio at mailman.qth.net>
Sent: Thursday, January 13, 2005 9:26 AM
Subject: [AMRadio] Grounds (was AM Amps)


> You know the old saying -- "Been there, done that, still have the scars"
> (and with a bit of time may be able to find the paramedic's report.)
>
> *Always* make sure AC powered gear has a GOOD earth/safety ground,
> even RF gear of *any* sort. You don't really want to know what happens
> when parts of you become part of the counterpoise for a 5 KW medium
> wave antenna system. And never ever defeat interlocks. Don't ask how
> I know.
>
> (OT-I've even got a couple good scars from my land mobile days
> from 1 watt UHF HTs)
>
>
> Tom NU4G
> "lockout-tagout poster child"
>
> >
> >Jim,
> >
> >If anyone believes that they don't need a good earth ground on their
> >equipment, I'd be glad to set them straight.
> >
> >Darrell, WA5VGO
> >
> >
> >At 06:07 PM 1/12/2005 -0600, you wrote:
> >
> >>Darrell,
> >>
> >>That amp you built with the 4-1000 was a "killer" in more ways than one!
> >>Time for a confession..
> >>
> >>Regards,
> >>Jim
> >  >WD5JKO
> >  >
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>
>
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>



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