[Boatanchors] Off Topic Antenna Question

[Rob Atkinson]

Hi Bill--he may need a different antenna for receive.  Nothing fancy,
just a small rx loop or even a random SWL type wire.   Also condx have
not been best for antenna testing lately, so it may work better than
it seems to right now because the band may be kaput.

You may be able to bring twin lead in with two small holes provided
the point where it enters is non-metalic.  the twin lead could switch
to two no.16 insulated solid pieces just a bit longer than the
thickness of the wall, drill two holes spaced the same as the twin
lead and not much bigger than the wire and push them through then
transfer back to twin lead to the tuner indoors.   two little holes
can probably be patched up eventually.   if he is not running high
power this may be okay.

73

Rob
K5UJ

On Sat, Jun 4, 2011 at 12:25 PM, Bill Stewart <cwopr at embarqmail.com> wrote:
> Hi Rob,
> The Eagle-1 is just a 31 ft or so vert wire in a  telescoping fiberglass pole. Its made for stealth, F/D and portable work. Radials are supposed to help and we tried it with 4/31+ footers. It is also grounded with some 3 ft. gnd rods plus hooked to the pwr. co. gnd. The antenna is fed thru a 4:1 balun with coax back to the tuner.
>
> He is using a Palstar tuner and it seems to load the Eagle up ok. We have heard a weak signal on the W4AX SDR rcvr in Atlanta...so a weak 40m signal is getting out. With the density of the town houses, the receive noise is ruff...another problem to address.
>
> We thought about running ladder line directly to the tuner, but have to be careful about holes in the vinyl siding plus can't have too many noticeable wires hanging off the side of the house, even tho all this business in going on at the back of the house.
>
> We hope to try adding a hank of wire to the tip of the Eagle antenna, to maybe help it be a bit more efficient on 75m and also use the vert. pole to support a 40m inv. vee...I like the inv. vee idea best. All this will need to be taken down after use...the stealth problem ya know.
>
> Tnx for your input...73, Bill K4JYS
>
> ----- Original Message -----
> From: "Rob Atkinson" <ranchorobbo at gmail.com>
> To: "Bill Stewart" <cwopr at embarqmail.com>
> Cc: "boatanchors" <boatanchors at mailman.qth.net>
> Sent: Saturday, June 4, 2011 8:58:31 AM
> Subject: Re: [Boatanchors] Off Topic Antenna Question
>
> I don't know what an eagle one is, but if it is like most verticals it
> probably needs radials to work well.
>
> re the inverted V, why not bring the twin lead directly in to a
> johnson matchbox and forget about using a balun?
>
> you might get all band 10 to 40 meter use with the inverted V that way.
>
> some hams have used a low profile (mobile) screwdriver antenna.  Not
> great but he could talk to you for example.   You have the mount with
> a few radials and stick the screw driver antenna into it when you want
> to use it and remove it when you are QRT.
>
> 73
>
> Rob
> K5UJ
>
> On Fri, Jun 3, 2011 at 6:23 PM, Bill Stewart <cwopr at embarqmail.com> wrote:
>>
>>
>> Good evening all.
>>
>> I hope this isn't too far OT and tnx for reading.
>>
>> A good friend lives in a town house complex with one on each side of his. We are trying to put up some type of stealth antenna. So far he has a Eagle One vertical, which is just a wire in a telescoping fiberglass pole. The wire/pole, at full extension, is about 31 or so feet. This antenna is mounted on a small deck (on first floor...shack on second floor). Initial tests have not been very good with the Eagle. We are gonna try an inverted vee using the fiberglass pole as a center support, with the ant. ends going to the ends of the deck and parallel to the house...the distance to the wall is only about 10-12 feet, and probably feed it with mini ladder line (300 ohm I think). I think we can squeeze in a 40 mtr inv. vee. He would like to use this antenna on 40-10mtrs if possible. He would like to use coax to get thru the wall and to the tuner. I guess some type of balun will be required.
>>
>>
>>
>>  My main question is does the ladder line need to be a specific length & what type of balun should be used....4:1? Due to the small deck size, the antenna will be only about 10-12 feet away from the rear wall and the shack...not a good situation. Also, the antenna will need to be brought down to deck level when not in use.
>>
>>
>>
>> Tnx for any advice on the ladder line situation.
>>
>> 73, Bill K4JYS
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