Cobra 29 LX LE Reference manual

Consumer Response Group

6500 W. Cortland Street *Chicago, IL 60707 *Phone: 773-889-8870 * FAX: 773-622-2269

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November 24, 2010 Page 1 of 2

TECHNICAL SERVICE BULLETIN

10073

MODEL(S): 29 LX, 29 LX LE

DESCRIPTION: Increasing the talkback volume

ACTION: To increase the talkback volume, reduce R21 from 91 ohms to 10 ohms.

Refer to the following page for the location of R21.

ADJUSTMENTS: None

NOTES: WARNING: This modification will increase the talkback volume, which will

also increase the possibility for acoustic feedback. If the radio squeals when

transmitting, then turn down the talkback volume. Depending on the

microphone that is used and the location of the speaker, this modification may

render the talkback feature unusable due to squealing. Note that this issue may

not occur until a later date, simply by changing one or more of the following:

1. Connecting a different microphone.

2. Connecting a different speaker.

3. Changing the location of the speaker.

4. Installing the radio in a different vehicle.

Technical Service Bulletin 10073 Page 2 of 2

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