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Siren Amps & BTL audio circuits

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cwb212001

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Joined
Jul 22, 2010
Messages
33
Location
Spokane, WA
Greetings and thanks for reading. I'm curious if anyone has ever run the audio out of radios such as the TK-790 or TK-5710 into siren amplifiers for the radio repeat function found on most of these. The concern is that if the siren amp provides either side of the audio with a path to ground this will blow the BTL audio amp circuit used in these (all Kenwoods??) radios. Kenwood tech support will only say don't allow the audio to go to ground. I have talked to Whelen tech support about their amplifier circuit designs and they couldn't tell me if it would go to ground or not. I'd like to hear if you've ever had success with this or if you have a work around. Thanks again.
 

ramal121

Lots and lots of watts
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Dec 5, 2008
Messages
1,742
Location
Sonoma, CA
BTL audio is used by a number of different manufacturers and is very common. Any name brand siren will provide a transformer or DC blocked input to prevent problems. Surprised Whelen couldn't confirm that. You should have no problems.
 

cwb212001

Member
Joined
Jul 22, 2010
Messages
33
Location
Spokane, WA
Thanks Ramal! As always you are the man with the answer. I think I caught a new tech on a Friday at closing time.
 
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