How to adtust modulation on a radioshack cb trc-496

SOURCE: Radio Shack TRC-502 cb radio

Here is the owners manual I'l see if I can get my hands on a internal schematic

http://support.radioshack.com/support_electronics/doc62/62220.pdf

Posted on May 14, 2008

SOURCE: Radioshack TRC-503 CB radio

First, use an ohm meter and test the power wires for continuity. If they test good then there is a protection diode on the board that is probably blown. If I remember right it is a 1N4001 diode. Generally you can see if its blown as it will either be burnt or look like its cracked. If it is you will need to replace that diode to restore power.

Posted on Aug 28, 2009

SOURCE: I was wondering what was the range for the

Antenna :
-should be tuned, have good coax with no pinches, whip is centered over highest flat metal surface, no metal beside adjacent to whip, power is wired to battery direct, not to ignition or cigg lighter. whip is wiped clean of corrosion, whip is up, longer is better.
Praire City car-to-car: 15-20 km's
Praire Rural car-to-car: four-thirds over the horizon. Probably 60 km's.
Alot further over water.
Less within trees and mountains/valleys.
Google "Ham radio" & "ducting" "inversion" "skip" "sun-spots"
these refer to a condition where a radio signal getting stuck between the upper and lower atmospheres and travel intact for 1000's of km's (canada to mexico for example)

Posted on Sep 06, 2009

SOURCE: how many amps does a Reakistic CB radio TRC-474

4 amps MAX

Posted on Jan 30, 2010

Jim Verge

• 35 Answers

SOURCE: Where can I get a circuitboard schematic for my

Try the radio shack website.
They have some service manuals that you can download.
Best of Luck!

Posted on Apr 12, 2010