On Mon, 12 Oct 1998, James Naylor wrote:
> A question for the radio experts out there.---
>
> I want to connect two radio's together so that I can switch to either for
> transmit and receive, with the option to receive on both. I know audio
> panels are available commercially, but they usually contain Markers ADF etc
> which I do not need, not to mention the cost.
>
> The only problem I have encountered, is feeding the two audio outputs into
> one speaker at the same time. Some form of isolation circuit is required
> to prevent the two radios trying to drive each other backwards, so to
> speak.
>
> I'm sure there must be a simple design that could be built into a small box
> with just one switch for selecting the radio (I have got this far) and one
> to select the speaker for both or individual.
>
> Any help would be appreciated.
>
> Jim Naylor
Are you sure you * can not * have indiviadual speakers ? the relative
weight penalty can't be that bad - one way would be to put one speaker
behind the other , in such a way that the air shifted by the one behind
finds it's way past the front one - ie it ain't trying to move that
speaker's cone. Make the front one smaller & mount it separetely.
I wouldn't suspect that the encrgy generated by the un - driven speaker
would be signiicant ....
nasty ascii time :-
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Happy building /flying , Bryan
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