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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