Message-ID: <DBC08856DE1A466AB396672CC8C280DA@acer>
From: "henny van elst" <cpm@planet.nl>
To: <rsgb_lf_group@blacksheep.org>
References: <4E418609.6020500@iup.uni-heidelberg.de> <67A6F7BF45BF4A0193A3DCB53000A283@PcMinto> <008401cc56ce$2f1fb2c0$0401a8c0@xphd97xgq27nyf> <12C475F3F4C84B818461753F2E8A60A6@PcMinto> <4E41AECB.90808@iup.uni-heidelberg.de> <8D68749D37B94275855FDBA46A3F6C97@PcMinto>  <op.vz0iyui5yzqh0k@pc-roelof> <1313033619.1543.20.camel@gerhard-desktop> <4E438B8B.1060800@iup.uni-heidelberg.de> <00c401cc5826$49523e70$71a9c00a@Clemens04> <1313074781.1701.7.camel@gerhard-desktop> <25D9CE8E-70C7-4FB5-8A10-0ED6B94255EE@numeo.fr> <1313090065.1579.46.camel@gerhard-desktop> <6814B311A817473C8285E3720DC0244A@acer> <1313315184.1533.5.camel@gerhard-desktop>
Date: Sun, 14 Aug 2011 12:33:33 +0200
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Subject: Re: LF: Re: HB9ASB...
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Hello Gerhard,
tu for the info,
I also use a 12 meter pole (spiderbeam ),but I need a second one to make a 
topload,so thank You again,
henny pa3cpm
best 73's

----- Original Message ----- 
From: "Gerhard Hickl" <gerhard.hickl@aon.at>
To: <rsgb_lf_group@blacksheep.org>
Sent: Sunday, August 14, 2011 11:46 AM
Subject: Re: LF: Re: HB9ASB...


> Henny!
>
> Just take a look at: http://www.dx-wire.de/brit/
>
> To support a small probe or a vertical wire the cheapest 10m pole is
> suitable and I think the price is really o.K.
>
> For my LF-Antenna with the top-loads I use other types of masts (one 12m
> and one 18m) available at:
>
> http://spiderbeam.com/home/index.php?language=en
>
> They are more expensive but really "heavy duty".
>
> 73
> OE3GHB
> Gerhard
>
>
>
>
>
>
>
> Am Sonntag, den 14.08.2011, 11:27 +0200 schrieb henny van elst:
>> Hello Gerhard,
>> can You give me the addres to order a fiberglasmast?
>>
>> henny pa3cpm
>> best 73's
>>
>> ----- Original Message ----- 
>> From: "Gerhard Hickl" <gerhard.hickl@aon.at>
>> To: <rsgb_lf_group@blacksheep.org>
>> Sent: Thursday, August 11, 2011 9:14 PM
>> Subject: Re: LF: Re: HB9ASB...
>>
>>
>> > John!
>> >
>> > Actually there is no special guying used since the mast is only the
>> > lower (and thus thicker) section of an originally 10m high "cheap"
>> > Fibreglass-Pole like available at http://www.dx-wire.de/fiberglasm.htm
>> >
>> > It is tied to the chimney with two tension belts which are commonly 
>> > used
>> > to fix cargo in a truck. (1 inch wide).
>> >
>> > Originally this method of fixing to the chimney was just thought to be
>> > for testing but meanwhile it is up there for more than a year.
>> >
>> > The two probes (LF/VLF) on top of the mast are suspended by a string
>> > which enables me to maintain the probes without bringing the pole down.
>> >
>> > 73
>> > OE3GHB
>> > Gerhard
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> >
>> > Am Donnerstag, den 11.08.2011, 17:58 +0200 schrieb John Rabson:
>> >> Gerhard,
>> >>
>> >> What guying arrangements do you use for the 5m mast, please?
>> >>
>> >> 73
>> >> John F5VLF
>> >>
>> >> On 11 Aug 2011, at 16:59CEST, Gerhard Hickl wrote:
>> >>
>> >> > Clemens, LF group!
>> >> >
>> >> > This is exactly the opposite that I experienced with the Mini-Whip.
>> >> >
>> >> > The higher I brought it up (= the farther I brought it away from the
>> >> > noise source, commonly called "house"), the better the SNR.
>> >> >
>> >> > Today I connected the shield of the cable to the lightning 
>> >> > protection
>> >> > system up on the roof and couldn't find any difference so far.
>> >> >
>> >> > I'm using a 5m fibre-glass pole fixed to the chimney as a support 
>> >> > for
>> >> > the probe and the shield of the feeder is only grounded in the 
>> >> > shack.
>> >> >
>> >> > 73
>> >> >
>> >> > OE3GHB
>> >> > Gerhard
>> >> >
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > Am Donnerstag, den 11.08.2011, 13:32 +0200 schrieb Clemens Paul:
>> >> >> Hi Stefan,
>> >> >>
>> >> >>> The pole that is on a noisy roof (and its noisy ground) and on the
>> >> >>> other side
>> >> >>> the pole that is far away in the garden, with its own and clean 
>> >> >>> local
>> >> >>> earth.
>> >> >>> In the garden a metallic pole should make no difference, as you 
>> >> >>> say.
>> >> >>
>> >> >> How true.
>> >> >> My miniwhip was completely unusable on the top of my roof,
>> >> >> with or without connecting the coax shield to the lightning
>> >> >> gr.. ehm reference plane.
>> >> >> So I decided to put it in the middle of thegarden where it is only
>> >> >> 30cm
>> >> >> above the lawn.
>> >> >> Here connecting the coax braid to a 3m long earth rod was essential
>> >> >> to get rid of the noise.
>> >> >> Now this setup is good enough for receiving SAQ with up to 30dB 
>> >> >> S/N.
>> >> >>
>> >> >> 73
>> >> >> Clemens
>> >> >> DL4RAJ
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> ----- Original Message ----- 
>> >> >> From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
>> >> >> To: <rsgb_lf_group@blacksheep.org>
>> >> >> Sent: Thursday, August 11, 2011 9:58 AM
>> >> >> Subject: Re: LF: Re: HB9ASB...
>> >> >>
>> >> >>
>> >> >>> Hi Gerhard,
>> >> >>>
>> >> >>> I think one has to compare two different situations:
>> >> >>>
>> >> >>> The pole that is on a noisy roof (and its noisy ground) and on the
>> >> >>> other side
>> >> >>> the pole that is far away in the garden, with its own and clean 
>> >> >>> local
>> >> >>> earth.
>> >> >>> In the garden a metallic pole should make no difference, as you 
>> >> >>> say.
>> >> >>>
>> >> >>> 73, Stefan
>> >> >>>
>> >> >>>
>> >> >>> Am 11.08.2011 05:33, schrieb Gerhard Hickl:
>> >> >>>> Roelof!
>> >> >>>>
>> >> >>>> With interest I was following all the discussions about the "Mini
>> >> >>>> Whip"-like antennas.
>> >> >>>>
>> >> >>>> In your description of the "PA0RDT Mini Whip" you suggest to use 
>> >> >>>> a
>> >> >>>> non
>> >> >>>> metallic pole for mounting the probe and an (optional) earth-rod 
>> >> >>>> to
>> >> >>>> ground (sorry Andy!!) the shield.
>> >> >>>>
>> >> >>>> I might be completely wrong but isn't it the same when one uses a
>> >> >>>> grounded metallic pole and connect the shield of the coax on top 
>> >> >>>> of
>> >> >>>> this
>> >> >>>> pole?
>> >> >>>>
>> >> >>>> BTW: I have an insulating pole (5m) on top of the roof and yet no
>> >> >>>> grounded shielding of the coax but just in the shack. I will 
>> >> >>>> connect
>> >> >>>> the
>> >> >>>> shield to the lightning protection system at the bottom of the 
>> >> >>>> pole
>> >> >>>> and
>> >> >>>> see about the difference.
>> >> >>>>
>> >> >>>> Actually it isn't even a true coax cable but a singe shielded
>> >> >>>> twisted
>> >> >>>> pair where the two inner wires are in parallel....Z=? Who 
>> >> >>>> knows????
>> >> >>>>
>> >> >>>> So considering my "fluffy" set-up, I think my VLF grabber is
>> >> >>>> performing
>> >> >>>> very well but for sure there is room for improvements as well.
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>> 73
>> >> >>>> OE3GHB
>> >> >>>> Gerhard
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>>
>> >> >>>> Am Mittwoch, den 10.08.2011, 21:26 +0200 schrieb Roelof Bakker:
>> >> >>>>
>> >> >>>>> Hello Minto, Stefan,
>> >> >>>>>
>> >> >>>>> Some food for thoughts:
>> >> >>>>>
>> >> >>>>> When I tested a mini-whip in the garden with battery feed and 
>> >> >>>>> also
>> >> >>>>> with a
>> >> >>>>> battery fed SLM, I found the noise lower than when used inside 
>> >> >>>>> and
>> >> >>>>> operated from the mains.
>> >> >>>>>
>> >> >>>>> The coax cable from the house station was connected in parallel
>> >> >>>>> with the
>> >> >>>>> mini-whip by means of a BNC T-piece.
>> >> >>>>> The noise increased by 9 dB. My assumption is that this noise is
>> >> >>>>> received
>> >> >>>>> on the shield of the coax inside the house.
>> >> >>>>>
>> >> >>>>> Without connecting the shield to a separate radio earth, the 
>> >> >>>>> noise
>> >> >>>>> received on the shield inside the house will travel over the 
>> >> >>>>> shield
>> >> >>>>> all
>> >> >>>>> the way to the antenna. There the noise will be received by the
>> >> >>>>> sensitive
>> >> >>>>> probe. This will be by means of capacitively coupling, I guess.
>> >> >>>>> Many
>> >> >>>>> people have reported a large drop in local noise by connecting 
>> >> >>>>> the
>> >> >>>>> shield
>> >> >>>>> at the bottom of the mast.
>> >> >>>>> This also applies to normal active whips of course.
>> >> >>>>>
>> >> >>>>> 73,
>> >> >>>>> Roelof, pa0rdt
>> >> >>>>>
>> >> >>>>>
>> >> >>>>
>> >> >>>>
>> >> >>>
>> >> >>>
>> >> >>>
>> >> >>> -----
>> >> >>> eMail ist virenfrei.
>> >> >>> Von AVG überprüft - www.avg.de
>> >> >>> Version: 10.0.1392 / Virendatenbank: 1520/3826 - Ausgabedatum:
>> >> >>> 10.08.2011
>> >> >>
>> >> >>
>> >> >
>> >> >
>> >> >
>> >> >
>> >>
>> >>
>> >
>> >
>> >
>> >
>> >
>> > -----
>> > Geen virus gevonden in dit bericht.
>> > Gecontroleerd door AVG - www.avg.com
>> > Versie: 10.0.1392 / Virusdatabase: 1520/3827 - datum van uitgifte:
>> > 08/11/11
>> >
>>
>>
>
>
>
>
>
> -----
> Geen virus gevonden in dit bericht.
> Gecontroleerd door AVG - www.avg.com
> Versie: 10.0.1392 / Virusdatabase: 1520/3832 - datum van uitgifte: 
> 08/13/11
>