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In the Forum: Off Air Audio
In the Thread: Antenna Cable Connection
Post Subject: French technician. Oxymoron? :-)Posted by Romy the Cat on: 12/20/2009

 RonyWeissman wrote:
I know lot's of small DIY shops but they would charge me several hundred euros to explain to me that they don't understand what I am saying.

Yes, this is a good one. I am in the same boat with most of the shops – they love to flash bogus credentials but in reality they are extremely ignorant. Still, what you need to do is relatively simple procedure for RF technicians. What you need is not DIY audio shops – they are Morons but a regular RF shot. Look for a community of short wave and ham radio enthusiasts. Their technicians are actually RF-trained and they shall be able to help you. Well, any shop that does tuner alignment will have skills to tune for you’re the antenna interface.  BTW, be advised the in very many cases, in fact in most of the tuners, the front-end to antenna are not optimized or very poorly optimized. In all my tuners I left only Schwarz’s antenna interfaces untouched. With any other tuner I was able to get more gain and less noise by changing the way how antenna does into front end. For instance the technician who worked with my TU-1X (Ken Bernacky from Stereo Surgeons) trashed out whatever Sansui did it and run the antenna cable directly into front end. In the second TU-1X he did the same but he put a very small cap on the antenna’s jack. Whatever he did the TU-1X had insulting sensitively as a result. I do not know what he measured and what reasoning he used but I think that any knowledgeable RF person shall be able to do the same.

What you need to do, if your tuner is aligned, is to tune your tuner to a given station, attenuate the signal until it shows let say exact 75% of signal and note the multipath volume and the attenuation number. The key is that you have to do it after you slide your antenna bas back and force and found the absolutely best sound. Then give your tuner to a technician to tune up the antenna interface. Upon getting the tuner back with your new BNC-75 connector you need to make sure that you do not lost any sensitivity and the same station will hit the same 75% of antenna signal with the same amount (or more) of attenuation. I am a bit suspicions” if you tuner is aligned then your alignment guy had to deal with it. If he did not then to re-tune juts the antenna interfaces shall not cost several hundred euros. In fact I would not pay more than 100 euros, including the shipment… to Germany … :-)

The Cat

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