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You can do it using three 70 volt line transformers meant for PA distribution systems.Each radio gets connected to the 8 ohm tap on a transformer and a speaker gets connected to a third transformer at the 8 ohm tap as well. All three transformer's 70 volt taps get connected together, It works and provides some isolation however it is a bit clunky with the transformers having to be put somewhere.

[QUOTE="Captain Kilowatt, post: 443574, member: 39"] You can do it using three 70 volt line transformers meant for PA distribution systems.Each radio gets connected to the 8 ohm tap on a transformer and a speaker gets connected to a third transformer at the 8 ohm tap as well. All three transformer's 70 volt taps get connected together, It works and provides some isolation however it is a bit clunky with the transformers having to be put somewhere. [/QUOTE]

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