I am using it on a base insulated vertical antenna. the relay closes
to connect it on transmit.An L would be the same. The L antenna would
float while listening You need to know your transceiver well and
program it to close the relay before transmitting. Hot switching is
destructive.If in doubt ask your other local DXers.
73
Bruce K1FZ
-----------------------------------------From: "WW3S"
To: "FZ Bruce"
Cc: "Mark K3MSB", "Rob Atkinson", "CUTTER DAVID", "TopBand List", "Guy
Olinger K2AV"
Sent: Thursday July 25 2019 12:15:35PM
Subject: Re: Topband: RFI on TB
How are you using this on the L ? NO on receive, then apply voltage to
close it on TX ? When open , does the L float or go to ground?
Sent from my iPad
> On Jul 25, 2019, at 8:36 AM, FZ Bruce wrote:
>
> 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] [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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