Topband: Beverage on Ice

[Tom W8JI]

Actually with freshwater below and ice at the top, they would not be like a 
BOG. They would not be like a suspended antenna either, but somewhere 
between and probably much closer to a Beverage in air than a BOG.

Insulating the wire would not help much (if any), because the ice is already 
an insulator and the ice beyond the insulation dominates the loss and 
reduction of wave velocity in the wire.

The general order is air, ice, rock, fresh water, dirt, and saltwater...but 
it all depends on temperature (for ice) and what is in it.

73 Tom


----- Original Message ----- 
From: "Guy Olinger K2AV" <k2av.guy at gmail.com>
To: "Eddy Swynar" <deswynar at xplornet.ca>
Cc: "Topband" <topband at contesting.com>; "Roger Parsons" <ve3zi at yahoo.com>
Sent: Friday, January 16, 2015 7:38 PM
Subject: Re: Topband: Beverage on Ice


>I think I would take insulated Flexweave to make an "Ice-BOG". I would use
> one of these Lithium-Ion hand held circular saws, with the depth of the 
> saw
> set to a quarter inch, or whatever depth you think will protect it from 
> the
> snowmobiles. Trench the ice with that and then push the wire down into the
> notch. Pour water into the notch and let it freeze back. At the ends,
> solder some bare #12 to the flexweave, enough to go to the bottom or 50
> feet, and let it drop straight down through a hole in the ice. Those are
> your "grounds". Don't bother with a termination resistor at the far end.
> The wire to water will have a complex impedance that should be good enough
> for a BOG. The rest is the usual transformers and feedline.  Make the
> flexweave 220 feet (67 meters).
>
> Be the first to go ice-bogging.  Keep notes and let us know wha hoppen. Be
> a great NCJ article.  :>)
>
> 73, Guy K2AV
>
> On Fri, Jan 16, 2015 at 5:10 PM, Eddy Swynar <deswynar at xplornet.ca> wrote:
>
>> Hi Roger,
>>
>> So very sorry to learn of your mobility issues there with that broken
>> leg...!
>>
>> Personal mobility---or, rather, the LACK thereof!---is something that I
>> have come to know only all too well here, what with my dual knee
>> replacements of 2013.
>>
>> Just a personal thought, or two, from me here: I would think that that
>> "...laid-atop-the-ice" antenna that you'e proposing would behave like a 
>> BOG
>> antenna---and for that reason, I think I would rather have it insulated
>> with plastic along its entire length, rather than relying solely upon an
>> enamel coating to serve as its insulation.
>>
>> Anyway, FWIW!
>>
>> Stay warm, and RECOVER ASAP, Roger...
>>
>> ~73!~ de Eddy VE3CUI - VE3XZ
>>
>>
>>
>>
>>
>>
>>
>>
>> On 2015-01-16, at 4:51 PM, Roger Parsons via Topband wrote:
>>
>> > I know that Beverages on Ground have been discussed on a number of
>> occasions, but:
>> >
>> > I live on the shores of a reasonably large lake, and at this time of
>> year it will be frozen to at least 2' and possibly 4' or 5' deep. I 
>> believe
>> that ice is a pretty good insulator, so I wonder about the effectiveness 
>> of
>> a wire just laid on the surface? It would be impossible to retrieve the
>> wire in the spring so it would have to be fine enameled copper. Even that
>> may not be very environmentally friendly? If the wire survived the first
>> couple of days it would be frozen into the ice - it would be at risk from
>> snow machines until that happened.
>> >
>> > This is just speculation from enforced idleness - I cleverly managed to
>> break my leg during a foolish last check of my receive antennas before
>> Christmas - so I can't even get into the shack, let alone onto the lake. 
>> I
>> was not very hopeful in any event that EP6T would be workable from here,
>> but I am determined somehow to get there for K1N...
>> >
>> > 73 Roger
>> > VE3ZI
>> > _________________
>> > Topband Reflector Archives - http://www.contesting.com/_topband
>>
>> _________________
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