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LC -

I've read every post in both of your threads, and there is only one thing that I have a hard time understanding. Why didn't you ground the radio and the linear? Freecell's contention that the coax can be a part of a ground loop is wrong. In a coax transmission line, rf current flows through the center conductor and is radiated into space at the antenna. There is no rf current flow on the braid. The function of the braid is to act as an rf shield and to help maintain a 50 ohm impedance throughout the coax length. Also, there is no DC component on the coax, because dc is decoupled from rf in the transmitter and the amp. So, if there is no current flowing on the braid, how can it function as part of a ground loop? It can't. The ARRL recommends grounding all equipment (base and mobile), and I think you should try this and see if it helps. It can't hurt.

The thing I find interesting about Freecell's little drawing in his 6/05/08 post, is that it is EXACTLY the method the ARRL recommends for base station grounding in their handbook. Hmmmm.

- 399

<blockquote data-quote="unit_399" data-source="post: 112795" data-attributes="member: 7311">LC -&nbsp;I&#039;ve read every post in both of your threads, and there is only one thing that I have a hard time understanding. Why didn&#039;t you ground the radio and the linear? Freecell&#039;s contention that the coax can be a part of a ground loop is wrong. In a coax transmission line, rf current flows through the center conductor and is radiated into space at the antenna. There is no rf current flow on the braid. The function of the braid is to act as an rf shield and to help maintain a 50 ohm impedance throughout the coax length. Also, there is no DC component on the coax, because dc is decoupled from rf in the transmitter and the amp. So, if there is no current flowing on the braid, how can it function as part of a ground loop? It can&#039;t. The ARRL recommends grounding all equipment (base and mobile), and I think you should try this and see if it helps. It can&#039;t hurt.&nbsp;The thing I find interesting about Freecell&#039;s little drawing in his 6/05/08 post, is that it is EXACTLY the method the ARRL recommends for base station grounding in their handbook. Hmmmm.&nbsp;- 399</blockquote>

[QUOTE="unit_399, post: 112795, member: 7311"] LC - I've read every post in both of your threads, and there is only one thing that I have a hard time understanding. Why didn't you ground the radio and the linear? Freecell's contention that the coax can be a part of a ground loop is wrong. In a coax transmission line, rf current flows through the center conductor and is radiated into space at the antenna. There is no rf current flow on the braid. The function of the braid is to act as an rf shield and to help maintain a 50 ohm impedance throughout the coax length. Also, there is no DC component on the coax, because dc is decoupled from rf in the transmitter and the amp. So, if there is no current flowing on the braid, how can it function as part of a ground loop? It can't. The ARRL recommends grounding all equipment (base and mobile), and I think you should try this and see if it helps. It can't hurt. The thing I find interesting about Freecell's little drawing in his 6/05/08 post, is that it is EXACTLY the method the ARRL recommends for base station grounding in their handbook. Hmmmm. - 399 [/QUOTE]

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