Mark
Although I am using the RF Parts relay on transmit verticals they work
great. They are 12 volt DC coils and are marked so on the relay. I
test checked mine with a little 9 volt battery and pulls great.In the
advertisement blog it says " Rated coil voltage VDC: 26.5 " This is an
advertising error.
https://www.rfparts.com/vhc3-12v.html [1]
73Bruce-k1fz
-----------------------------------------From: "Mark K3MSB"
To: "CUTTER DAVID"
Cc: "Rob Atkinson", "TopBand List", "Guy Olinger K2AV"
Sent: Thursday July 25 2019 7:59:32AM
Subject: Re: Topband: RFI on TB
I’d be interested in hear about this also. I’ve always used ground
radials for my INV-L but this year I’d like to try an FCP.
I’ve read that the INV-L as well as the FCP need to be floated
during
receive, which means two relays at the INV-L.
73 Mark K3MSB
On Thu, Jul 25, 2019, 4:11 AM CUTTER DAVID via Topband <
topband@contesting.com> wrote:
> Guy
> Slightly OT, but how do you deal with re-radiation from your
inverted L?
> I'm about to erect one of your inverted L on FCP and my rx loops
are about
> 50m away in the other corner of the field. Is that far enough?
> David G3UNA/G6CP
>
> > On 24 July 2019 at 07:13 Guy Olinger K2AV wrote:
> >
> >
> > I gotta agree with Rob. An inverted L aerial wire will hear ALL
the noise
> > that is around. Mine sure does. RX antenna will help enormously
if there
> is
> > a place to put one that does not get the noise second hand off
the L. Not
> > enough room? A bit complicated, but "repeated" noise off the L
can be
> dealt
> > with.
> >
> > The worst noises around here heard on my L were all repaired by
the power
> > company. The nastiest noise was very hard to find, I actually
never
> "found"
> > it by looking for it. Noise turned out to be from a bad splice in
an
> > underground 13 kV cable going from the 13 kV delta overhead out
on US 64
> to
> > the transformer for my eastern neighbor and next house over. It
would
> come
> > and go with extended cold weather, but never would correlate to
sunlight
> or
> > darkness. I would hear it next to my transformer walking around
with my
> > battery K2 and a rubber ducky. It would never locate to up on a
pole
> (only
> > power noise that didn't).
> >
> > Finally the splice hard-arced, exploding the fuse up on the pole
for the
> > neighbor's 13 kV feed, and taking those two houses off the grid.
The
> noise
> > went away with the cannon shot noise. Blessed quiet on 160 and
80. I had
> > put up with that for almost four years.
> >
> > In the end, Duke Energy completely reran his AND my buried 13kV
lines,
> and
> > replaced his transformer. 35 years in the ground, 35 year old
cable
> design
> > and materials, and deficient in THEIR opinion. Was really fun to
watch
> them
> > use this super-neat burrowing setup that went right UNDER the
woods and
> the
> > creek (whole other story). Now I can hear the lesser noises on my
L from
> > all over Apex and Cary :>) Need RX antenna for sure. That way I
don't
> have
> > to listen to the Cary, NC noise (NE) at the same time as the
generally
> > closer and louder Apex, NC noise (S, SE).
> >
> > 73, Guy K2AV
> >
> > On Tue, Jul 23, 2019 at 9:37 AM Rob Atkinson
> wrote:
> >
> > > > Over past few months, I have picked up an S5-S7 noise
signature on
> my TB
> > > inv
> > > > L antenna with K2AV FCP system.
> > >
> > > I would not use an inverted L for receiving. Unusable for rx at
my
> > > QTH but FB for transmitting.
> > >
> > > 73
> > > Rob
> > > K5UJ
> > > _________________
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Topband
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> > >
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