Where to send the brick?

Well if that 9200 rides as rough as it sounds, and his antennas are matched okay, then i’m leaning towards bad solder joints. I guess we really won’t know until Rusty gets a report on his radio from Q5. At least that may give us a clue.

 

Rusty, i forgot to ask you. Were all these radios bought new by you? Did you have any tech do the so called peak and tune on them? You mention they developed issues, just wondering what the symptoms were. Were they the same problem or different? Unfortunately it sounds like the tech who worked on your Galaxy didn’t fix it correctly. Not sure why he would send it out the door that way.

 

These new mosfet radios like to self destruct when the match isn't close to 50 ohms.

 

I Cherish radios,but,everytime I get a good setup...Some transient with a Backpack,Slim Jims my door at 2am amd "swings with",my Killer stuff.Just bad luck,I guess?

 

R=50 X=0


Until you understand the importance of the match, you're not ready to push the talk button on your Mic without blowing up the radio. Keying the radio into a 20 ohm load is like trying to accelerate from a dead stop with a heavy load in tenth gear.

 

Means they will go poof if antenna set up is not on or #### near 50ohms resistance..

 

They are talking about the transmit power transistor in the radio. The cobras use whats known as a bipolar transistor, and the newer galaxy radios use whats known as a mosfet power transistor. The mobile antennas are anywhere from 25-36 ohms, and your radio & coax are around 50 ohms. Thats why you have to tune (adjust) your antenna to match the 50 ohm radio. Its called SWR. If you dont, the 4 watts from your radio isnt getting into the air. A lot of that RF power is being reflected back into the radio which is bad, because you cant talk/receive very far, and it will eventually burn out the transmit transistor (final) in the radio. Bipolar transistors are more forgiving to high SWR than mosfet transistors. So you can see how important tuning the antenna is. Hope this makes sense.

 

just use a long wire out the bottom of the sleeper with a tuner, becareful when backing up