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In the Forum: Off Air Audio
In the Thread: Antenna Cable Connection
Post Subject: The front-end entrance optimization.Posted by Romy the Cat on: 12/19/2009
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 RonyWeissman wrote:
Strange but I have found that my reception is significantly better if I don't use any connector between my antenna cable(radio shack RG whatever going up to rooftoop antenna) and my tuner but instead just strip off a bit of wire at the end of the cable and stick it directly into the antenna input on the tuner. Actually how far I stick it in depends upon the station I am listening too, kind of kinky. What is wrong? Faulty cable?Happy but curious,R Weissman
It is not wrong. This is normal – you most likely have not optimally-tuned front end, at least it what I think. The entrance of antenna cable to front-end is very tricky thing and very fastidious thing. As you might see some tuners have choke and antenna cable come a specific tap of the choke. The choke moderates how the antenna transmission line is terminated, the loading capacitance and inductance. I think that what you do - sticking the antenna wires more or less deep -  is in fact changing the capacitance of the antenna and front-end coupling.

I feel it would be a good idea to let your technical to observe your tuner's front-end and optimize it for whatever they optimize it for. I would not feel comfortable with cable sliding here and there, it might be kind but you hardly can calibrate and moderate the improvement you get. I presume that RF technical shall be able to make sure that your front-end is optimized for your antenna.

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