Re: ARLA/CLUSTER: Será que vale a pena investir no antena tuner LDG IT-100 recomendado para os transceptores da Icom
Quarta-Feira, 28 de Dezembro de 2016 - 17:01:48 WET
Na minha opiniÃ£o e contando como operaÃ§Ã£o portatil ( poupar bateria ao
maximo) opto pelo MFJ-945E.
pequeno, nÃ£o gasta bateria e Ã© compatÃvel com todos.
DÃ¡ trabalho, sÃ£o opiniÃµes.
2016-12-26 18:19 GMT+00:00 JoÃ£o Costa > CT1FBF <ct1fbf gmail.com>:
> Why you should consider the LDG IT-100 for your Icom transceiver
> Do you own an Icom Transceiver and is your aerial a long wire or
> doublet type, or a vertical, if you answer yes to these questions I
> would consider buying the tuner, for these reasons.
> Small Size Enclosure: 6.5L" x 6.5W" x 1.25H". Weight: 1.5 pounds.
> The L.D.G. does a better match over a greater impedance range than the
> ICOM tuner especially if a balanced to unbalanced transformer is
> fitted, I used a 4:1 transformer this allows an aerial of impedance 16
> ohms through to 3600 ohms to be matched.
> The tuner without the balanced to unbalanced transformer will give you
> a 4 to 800 ohm load match from 1.8 Megahertz through to 54 Megahertz,
> to operate the tuner you simply press a button on the front of the
> unit, or you can start the matching by pressing the P.T.T. switch.
> There is no need to constantly check the V.S.W.R. reading because the
> tuner is automatic, as you tune up and down the band the tuner
> connects as the S.W.R. exceeds a pre-set limit, an ideal facility when
> using the IC-7100 in a mobile or portable situation.
> I like the fact that the tuner has 2000 memories which are stored in
> the unit, if you are near a frequency which you have previously used
> the tuner remember the settings.
> Because the L.D.G. is matched to you particular rig, the tuner
> automatically reduces your power, transmits a carrier signal then
> restores your original power setting.
> Using the ICOM IC-7100 and a doublet dipole, which is essentially a
> dipole cut for the lowest frequency your aerial space can accommodate
> in my case an eighty metre dipole cut for the C.W. portion of the
> band, and fed with open wire feeder. I make my own open wire
> feed-line, use the same wire you have used for the radiator and space
> the wires about four inches apart.
> You are looking at a total top length of about 132 feet for eighty
> metres, adding approximately 30 feet of open wire feed-line the
> L.D.G.IT-100 gave me a good match from the middle of 160 metres
> through to ten metres. This demonstrates the range of impedance the
> device will match, and I use about 100 watts of power.
> Concluding this article about the L.D.G. IT-100, I would recommend it
> if you enjoy mobile working or portable operation because the matching
> range is very large and convenient, automatic matching works well and
> it is very fast. I used the tuner with a quarter wavelength whip for
> twenty metres and in conjunction with a 4:1 transformer the tuner gave
> a good match all the way through to six metres or 50 Megahertz.
> John Allsopp G4YDM
> Article Source:
> Article Source:
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> CLUSTER radio-amador.net
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