Question about Cobra 148 gtl 40-channel classic cb radio
It haves the 8719 up grad
SOURCE: cobra 148 gtl
Open the radio up and find the L22 Can/Pot. It's the one with the wire soldered on top. With both fine and coarse Claifier/Voice Locks in the 12 O'Clock positions, confirm, then listen for someone that is on the correct frequency and turn this pot (small ferrite core inside) with a small plastic preferred screwdriver, until they sound clear. Do this for USB as well except, the Can/Pot is L59. Don't adjust the VR5 (transmit) unless you need to.
Posted on Dec 01, 2007
SOURCE: cobra 148 gtl
First take a jumper wire and connect it to the DC Ground of the input of the radio then touch it to the TX pin on the radio if it does keyes up then its in the mic or mic cord on the end of the mic plug or where it goes into the mic cable goes up inside the mic. If the radio don't key up at all then check the main voltage regulator chip one pin will have 8 volts transmit and another pin will have 8volts recieve. If you get no switching DC voltage on the regulator then its bad and needs replacing there is also a known bad capacitor in the radio thats only 10 volts change it to 25 volts at the same capacitance.
Posted on Jan 08, 2008
There should have been instructions that came with your reverb board. You are going to need to drill another hole in the case of the radio, or find a control where you can install a dual control knob onto.
Your reverb board is likely going to need 8v, so you will need to locate that off the logic board, likely from the frequency synthesizer. The the audio lines from the mic, or the output of mic amp, are going to be redirected to the reverb, and the output of the reverb feed back to where the wires were removed from.
If I recall correctly, the 148 is a bit of a bear to work with, not much room inside. You will likely have to get creative in placement of the reverb board itself. Make sure to wrap well so that it doesn't get tossed around and break something inside.
Posted on Sep 15, 2009
Tips for a great answer:
Oct 25, 2012 | Cobra 148 GTL 120-Channels Base CB Radio
Jul 28, 2012 | Cobra 148 GTL 120-Channels Base CB Radio
Jun 15, 2012 | Cobra 148 GTL 120-Channels Base CB Radio
Jun 11, 2011 | Cobra 148 GTL 120-Channels Base CB Radio
Aug 02, 2010 | Cobra 148 GTL 120-Channels Base CB Radio
Mar 26, 2010 | Cobra 148 GTL 120-Channels Base CB Radio
Oct 27, 2009 | Radio Communications
Apr 25, 2009 | Cobra 148 GTL 120-Channels Base CB Radio
Oct 06, 2007 | Cobra 148 GTL 120-Channels Base CB Radio
45 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: