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This will depend on the radios in use. Some radios use a floating speaker output that is not common to chassis ground. Motorola does this on some radios. If you tie this speaker in parallel with a rig that has a common ground speaker, the audio chip may pop. Diodes are not useful to isolate AF like they can with DC but an isolation transformer may help.

[QUOTE="Shockwave, post: 443326, member: 10882"] This will depend on the radios in use. Some radios use a floating speaker output that is not common to chassis ground. Motorola does this on some radios. If you tie this speaker in parallel with a rig that has a common ground speaker, the audio chip may pop. Diodes are not useful to isolate AF like they can with DC but an isolation transformer may help. [/QUOTE]

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