Question about Radio Communications
If your radio is working fin without the amp and when the amp is enabled a fault in receiving is evident you probably have a bie-amplifier Liner amp design , if so i should suspect the switching device in the amp is locking on transmit and your receiver is still connected to the input of the output amplifier.
when you un-key,.observe the switching relay in the amp to see if it switches when you key and un-key
for further help i must have much more detail.
Best regards Falco
Posted on Oct 15, 2013
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Posted on Jan 02, 2017
SOURCE: Cobra 29 ANT light
I believe it to be feedback but be aware of your Standing wave ratio because using a linear amp radiates signal to the point that it could cause that light to come on. There is a problem if the radiated signal is feeding back into the amp a a higher level that it can withstand over time.
Posted on Sep 09, 2007
Yes it could, but... but it also depends on your antenna, what antenna are you using. Do not upgrade the power of your radio unless you know your antenna can handle the output power.
Posted on Oct 13, 2008
Well,first hand ,some cobra radio,s have red some have green RX/TX lights, but are you modulating? Some green lights turn red. What is your standing Wave on the antenna,s? You need to check it and the output of the radio. To do this you need a watt or field strenth meter. Can get one at Radio Shack. Your standing Wave is ok as long as it is below a 2. That has to be done on the antenna. ..hope this helps...
Posted on Mar 12, 2010
Testimonial: "Thx the rx/tx light is supposed to turn red I found out. Still trying to get the antenna prob fixed though."
The red light is a warning of antenna mismatch; when you hold the antenna, you are changing the match between the CB's output amplifier and the antenna. Try it with a different antenna or pick up a 'test light' (or test load) for CBs from an electronics dealer, I've also seen them with CB accessories at truck stops. If the test light fires off and the red light on the CB is dark, the antenna you have is junk.
Posted on Aug 01, 2010
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