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HunterWanderer
regular


Reged: 01/04/2002
Posts: 467
Loc: Norfolk UK
Re: SSB Ground [Re: chrism]
      #1846139 - 03/05/2008 15:49

I use my aluminium toe rail and guardwire system as the ssb ground and just an insulated long wire antenna to the masthead . It works really well and avoids the problems of installing foil etc and insulating the backstay.

Richard
M0EAZ

--------------------
Richard


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Captainslarty
regular


Reged: 12/08/2007
Posts: 2012
Loc: Currently La Coruna Spain
Re: SSB Ground [Re: HunterWanderer]
      #1846141 - 03/05/2008 16:05

Aha,, an M0 .. nice one dude... get confused these days with all the bloody new callsigns lol..

yes, the grounding is no big deal..
One could even use counterpoise wires cut to the correct freq for the bands in use.. load them if too long..
most of the advice on internet fora is NOT from radio hams etc.
I have been playing HF for more than 26 years now.. (Originally a G1, just missed G6).
Use what you got, its all a compromise.. but, I must confess, the 23 foot whip is FAR FAR better than an insulated stay - for ME !..
AND, it makes me ketch a 3 master - tall ships race next hee hee... also, spare mast if dismasted - might even try another riding sail on it.. hmmm... a cunning plan..

--------------------
PM me for info re SSB's etc. Bought, sold, repaired, fitted and optimised.


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HunterWanderer
regular


Reged: 01/04/2002
Posts: 467
Loc: Norfolk UK
Re: SSB Ground [Re: Captainslarty]
      #1846194 - 03/05/2008 17:59

These call signs are very confusing. Full op licence M0 and foundation is M3 why?

and the intermediate is 2E ...

Anyone interested in a marine net on HF for UK waters?

--------------------
Richard


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whipper_snapper
regular


Reged: 09/08/2006
Posts: 1309
Loc: Kenya
Re: SSB Ground [Re: HunterWanderer]
      #1846311 - 03/05/2008 20:58

I'm a M0, I am also a 5Z4. Anyone fancy giving me a call on 20m and collecting an exotic callsign? I promise not to mention GMOs.

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starfire
regular


Reged: 07/05/2005
Posts: 86
Loc: utus
Re: SSB Ground [Re: whipper_snapper]
      #1846410 - 03/05/2008 22:14

Ham's everywhere, G0MKK / KJ6ZT

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Frankklose
regular


Reged: 25/11/2001
Posts: 68
Loc: germany
Re: SSB Ground [Re: HunterWanderer]
      #1846916 - 04/05/2008 17:47

Nice idea with the toe rail. How long is the boat.
DL1EEU ex G5ERB / G4YYZ


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david_brighton
regular


Reged: 15/11/2002
Posts: 991
Loc: Brighton UK, boat nr Trieste. ...
Re: SSB Ground [Re: Frankklose]
      #1847036 - 04/05/2008 20:18

I am keen to try and get people interested in a new HF Med hamnet in July/August
Anyone care to suggest frequencies and times ? 7085LSB or 14285USB at say
0600GMT?

--------------------
Is August a sailing month?


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DrBob
regular


Reged: 22/12/2004
Posts: 128
Loc: Somewhere between Port Edgar a...
Re: SSB Ground [Re: starfire]
      #1853584 - 09/05/2008 21:55

"Ham's everywhere, G0MKK / KJ6ZT"

Except on the air!!!

Sounds a good idea to get a net going. Awfully quite up here in the frozen north. Just got the radio on the boat and up an running.

Dr Bob
GM0ECO

--------------------
blog at www.ronautica.co.uk

Chemists see the glass as half full, Chemical engineers see it as half empty - I go looking for a bar to fill it up


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yachtfunkdotcom
new user


Reged: 11/01/2006
Posts: 2
Re: SSB Ground [Re: jerryat]
      #1895109 - 15/06/2008 12:15

Or for GRP Hull´s :
Grounding is as important as the antenna itself since it is the antipole to the antenna. The performance of your SSB – equipment - reception and transmission - will be insufficient without good grounding. Steel- and aluminium - vessels bring about optimum grounding properties as for their metal characteristics. Even when an antifouling coating is applied, grounding is realised by capacitive coupling to seawater (capacitive grounding).

It is a much greater challenge to properly ground a GRP – yacht. This can only be realised when allowing for a short cable connection from the tuner to a maximum sized ground plane.

Using dynaplates / sea ground is only a short-term solution to this problem as they start to corrode after a while. Shells and algae add to the problem of loosing effectiveness.

SSB-ground-paint should be applied inside the vessel below the waterline near the antenna – tuner. This also allows for capacitive coupling to seawater. A surface area of about 3qm should be painted for good results. This installation has three major advantages: Firstly, the tuner can be located close to the ground plane. Secondly, we can couple a rather huge area to seawater, and thirdly, the coated area is not susceptible for environmental effects that would lead to corrosion, hence it is maintenance free.

SSB-ground-paint is solvent-free and can easily be applied in the abaft area under the bunks in the bilge. Over coating with conventional spar varnish for conservation is unproblematic. The antenna – tuner is connected to SSB-ground-paint with the help of a broad embedded copper strap. SSB-ground-paint is no lightning protection.

fair winds Joerg


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