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David,
My solution is I have a primary panel mount and a secondary panel mount and a portable.
The primary panel mount has minimum connectors all the way to the belly mounted antenna.
The secondary panel mount goes through a connector accessible to the pilot and thence to the inferior antenna.
If I were to have a total power loss or both panel mounts died, I would manually uncouple the connector on the secondary and plug in my portable leaving the panel mount side of the connection dangling.
Rationale:
My primary probably isn't going to die or lose power so I would like to optimize its performance. Therefore I don't add any 1/2 db loss connectors in the path for that one.
My secondary has an antenna that is not as good as the primary but way better than a portable. I'll take the 1/2 db loss for the extra connector on the reasoning that a little worse than bad nearly equates to bad.
I've eliminated huge losses of a passive splitter and complexity of a switch for a function that will probably never be used.
Colyn
On Aug 17, 2011, at 7:43 AM, Dr. Weinsweig wrote:
hi all,
anyone have experience with a plugin(switch) for a handheld radio to go through the external antenna ie for a backup to a radio failure. in the spirit of redudancy, i was thinking of adding this to my panel as early on i had a stuck mike(fixed with replacement of the audio panel) and i thought this may be a worthwhile backup. however, upon looking further into this, apparently it may rob the panel mounted radios of db's and i have read that when it is used it may damage the panel mounted radios. fact or fiction? is it worthwhile? downsides?
thanks,
david weinsweig
lancair propjet n750dw
weinsweigd@gmail.com 304-633-5221
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