<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Caros colegas,</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px"><br></div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
Comprei uma destas antenas já há algum tempo, por ser bastante discreta(condemónios...), leve, cobrir 6 bandas(6m/10/12/15/17 e 20m) e não necessitar de radias. Nunca a "afinei". Limitei-me a ajustá-la para as medidas indicadas pelo fabricante para as diversas bandas e nos 6, 10 e 20m até ficou razoável, de modo que só há poucos dias resolvi "descê-la" do telhado e afiná-la e aí constatei que em duas bandas, 17 e 24 Mhz, o "deep" está fora da banda! mesmo puxando o tubo de afinação todo para fora, continua "curta", ou seja, ressonante lá para os 19/20 Mhz na banda dos 17m...</div>
<div style="font-family:arial,sans-serif;font-size:12.800000190734863px">Entretanto vi no "eham/review" algo de mt semelhante q aconteceu a um colega americano:</div><div style="font-family:arial,sans-serif;font-size:12.800000190734863px">
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<td align="left" colspan="4" style="font-family:Arial,Helvetica,sans-serif;font-size:10pt">I bought the MA5V antenna because I needed a stealth like antenna in my restricted Florida neighborhood and because Cushcraft has (or had) a good name... until it was bought by MFJ. Antenna arrived and would only tune to 20 meters, all of the four other bands, 10, 15, 12 and 17 had no SWR dip. Called MFJ and they sent new elements for these bands. Same result... no dips. Packaged it up ready to send back and have them return my money when I decided to take off the liquid tape where the coils connected to the elements to see if the connections were good. It took a lot of scraping and fussing with an exacto knife to do this. I was surprised to find that they used enameled wire in the coils and did not scrape the ends of the wires! What's more the wires were inserted into wire clips on the elements, but none of them were soldered! I had to scrape off the liquid tape from 20 connections (did the 20 meter coils too), clean off the enamel and solder all of them. Then, I got the dips and could tune the antenna. Called MFJ again to tell them how I fixed their antenna... their response, was... "I'll walk back there and talk to them." Once the connections were fixed, the antenna worked nicely although its bandwidth is quite narrow on most bands. The antenna fit the bill as a very small profile stealth antenna that works, but the experience of getting it working was frustrating, to say the least. Beware of quality control.<br>
<br>Infelizmente este OM não tem o email no QRZ.com, senão ter-me-ia dirigido ao mesmo. No entanto acho estranho a falta de contacto referida pois tenho continuidade(0.1 ou 0.2 Ohm) nas extremidades dos traps(bobinas) Nos tubos imediatamente antes e depois das bobinas(ou terá algum condensador lá metido, em paralelo e é aí o mau contacto?).<br>
<br>Peço desculpa pelo "cambão", mas talvez alguém tenha uma ideia antes de começar a "rebentar" com o lindo isolante esmaltado dos "traps"...<br><br>73 de CT1PT</td></tr></tbody></table></a><div>
<br></div>-- <br>Carlos Pinheiro<br>
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