My rf gain is out where do I find one, Mic gain/ Rf same knob on my 44v 1kb mic / 1ka rf gain dual knob vaiable

unless you are right next to a station that has some power, set RF gain to max. Mic gain can be set at max level to 3/4 with no problems. If you have an amplified mic, then mic gain should be set at about the 12:00 position. hope this helps

the knob that turns the radio on and off is the volume potentiaometer.turn it 1/2 wayopen.the next knob is the squelch maqke sure it is all the to the left.the next knob is the mic gain and the RF gain.Set the mic gain at 1/2 and the RF gain all the to the right.the next knob is the delta tune,set it 1/2 way the next knob is the calibration knob leave it alone.Now above those knobs are little switches .the third switch from the left is for CB/PA make sure its on CB. check the WX switch and make sure it not on a weather station. and finally the last switch to the right is called a dynamic squelch switch.Make sure it is down. with all said your radio should be on and you should be able to hear sound. If not ,take an external speaker and hook it to the external speaker plug in the back of the radio.If you hear something then you internal speaker is junk.replace it .

Is this new mic wired for your radio? just because it fits the socket doesnt mean its right. Did the old mic do the same thing reason why you got the new one? just sounds more like a loose wire at the jack where the mic plugs in? has that connector ever been loose or needed tightened at any time?

start off at about 1/2 way then adjust to your choosing. Don't forget about the mic gain . Set it the same way . squelch wide open then turn back till it just cracks . should be good.

where is the RF gain? It should be all the way up.

The other thing that can cause no receive. Its a common issue. If you have a mic with a broken wire in cord, if its the wire for receive, then when the key is released the radio will not go into receive mode. The switch in the mic determines weather the radio is in transmit mode or receive mode.

So make sure the RF gain is on max, and try another mic.

make sure the RF gain is on max.

If the meter is moving when receiving, but you don't hear it, it could be the mic. Try a different mic and see if it works. It could also be a broken wire to the mic jack.

If the meter doesn't swing when some one is transmitting to you and you don't hear them, there could be either something wrong in the receive section of the radio, a bad resistor in conjunction with the RF gain control, or it could just be a bad knob.

You can hot wire it to full to check it like this:

Look for the wires on the RF gain knob. Its 2 wires. Disconnect them form the knob and twist or solder them together. If you have receive after that its a bad knob.

You can replace it, or just solder the wires permenantly together and put some shrink tube on it and use it like that. You don't need RF gain any way.

Most of the time its on full any way. no need to turn it down.

LA 900? I am guess that is a linear amplifier. If so are you running a power mic? You are probably getting RF feedback. You need to turn the gains on the radio and mic down.

Some things you can try. Hold the mic cord in your other hand in the center of the cord while you key it. some times this will shield it form stray RF.

You can also get a bunch of RF chokes from radio shack. They are little black things you snap onto wires that shield form RF. Put 2 near the plug, and 2 near the mic. That will help shield it from RF.

you will most likely still have to play with the gains on the radio and mic to find a sweet spot where it doesn't squeel.

Turn up the RF gain all the way and leave it.

RF gain is basically how open your receive is. There is really no reason ever to have it down unless you are trying to hear only close stations to you.

If you RF gain is up, your mic pins my be oxidized, or mic bad.
Try a different mic, and or clean the contacts in the connectors.

There are little red dots on the edge of each knob. As a starting point, try these knob positions (starting from the knob on the left)..
Adjust volume as desired.
Adjust squelch all the way counterclockwise (no squelch).
Adjust mic gain so the red dot is at the 12 o'clock position.
Adjust mic gain so the red dot is at the 12 o'clock position.
Adjust light dimmer as desired.
Adjust RF Power with the red dot at the 12 o'clock position.
Ignore talkback and clarifier for now.
Now for the 5 little slide switches...
Set all of them to the middle position.
Now you should be able to operate transmit and receive.

This is a very good radio, but there are so many adjustment knobs that you can reduce its performance if you just blindly turn knobs.
After you learn how the radio sounds and works with these average settings, play with each knob, adjusting a little and see what it does for your particular antenna setup. Do some "radio checks" with other CBers and find out what your best settings are. Also read the owners manual for guidance on what each knob does...especially mic gain (too low and you won't be heard, too high and you'll be garbled) and RF Power (to little and you won't reach out very far, too much and you'll overload local listeners). This is definitely not a beginners radio. But it is a lot of fun and will enable you to learn a lot.

Is there a dial marked RX Gain? Does this radio have this feature?

M3ODQ