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Microphonics in Kenwood HT’s

tmrva

Newbie
Joined
Mar 25, 2013
Messages
7
Location
Phoenix, AZ
I am a 2-way radio dealer with a specific problem with several radios that came in from various clients for repair. At very low volume the radios (Kenwood TK-3300 or TK-3400 series) perform fine. However when turning the volume up to a normal listening volume for a warehouse or industrial setting, the audio from the speakers of these affected units causes a feedback loop with some component in the radios, causing screeching and distortion in the audio output. Using a headset or speaker-mic solves the problem but many customers just use the HT’s as stand-alone with no headset. Is there some way anyone in the profession knows to reliably dampen the vibration and prevent the oscillation and feedback from occurring?
 

kd4efm

Member
Premium Subscriber
Joined
Jul 14, 2002
Messages
2,633
Location
Florida
test first with a plain piece of paper behind the speaker (flat) See if that dampens the phonics.
Should be a like a black felt like backing on the coil part, but if you have felt, try that.
Also if your a KWD dealer, log into Zendesk and submit an FPR.
 

ramal121

Lots and lots of watts
Premium Subscriber
Joined
Dec 5, 2008
Messages
2,121
Location
Calif Whine Country
Wow. Two at once. I replied here...

 
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