I discovered this somewhat by accident.
You can get an extra band of 40 channels, 27.865-28.335 on the Midland 75-820, 75-822, and Cobra HH45-WX........this will likely work also on Cherokee AH-27, and other similar radios but tested on 75-820 and HH45.
I also discovered how to get the 5 alternate, "A" channels.
3A, 26.985
7A, 27.045 (wreak havoc on kids cheap RC cars)
11A, 27.095
15A, 27.145
19A, 27.195
It is really simple, but first you must modify the radio for 120 channel (export mode)
For the Cobra HH-45,
http://www.worldwidedx.com/radio-radio-related-modifications/101454-cobra-hh-45wx-channel-mods.html
For the Midland 75-820 or 75-822,
Bill's CB & 2-Way Radio - Midland 75-820 Modification information
Now that you soldered the jumpers and RESET the CPU for uppers and lowers.....continue, the rest is just pushing buttons
Go to channel 40L
Now the hard part,
You must hold the channel down button for about 5 seconds or until it starts rapidly going through the channels, basically hold it until it starts beeping more rapidly.........and keep holding it.
As you are holding channel down button, you should see the channels are now 80H, 70H, 60H, 50H, 40H.....and so on..........
YOU MUST STOP ON CHANNEL 80H, its a trick, you might want to get your video game addicted son to do it for you, what I do is let go the button when it says 10H, because by the time I release it its gone to 80H.
Once you got it on 80H, press channel up button until you get to channel 88H...DO NOT GO PAST 88H OR YOU MUST REDO
You got it on 88H, GOOD!!!! now save it to a memory button.
For Cobra HH-45, Press "FUNC" once and then hold the memory button of your choice, I used M4 on my Cobra.
THATS IT FOR 27.865-28.355, which are now channels 41H-88H.
You can see the frequency by holding the "FUNC" button for several seconds.
Now to get the 5 "A" channels.
Go to channel 40
Now the hard part, just like deja-vu all over again.
You must hold the channel down button for about 5 seconds or until it starts rapidly going through the channels, basically hold it until it starts beeping more rapidly.........and keep holding it.
As you are holding channel down button, you should see the channels are now 80L, 70L, 60L, 50L, 40L.....and so on..........
YOU MUST STOP ON CHANNEL 80L, its a trick, you might want to get your video game addicted son to do it for you, what I do is let go the button when it says 10L, because by the time I release it its gone to 80.
Actually, channel 70L might work, or even 50L or 60L because its still in that range, but I havent tested it with another channel.
Now save the channel to memory, just in case you screw up so you dont have to do it over again.
Now hold the "FUNC" button for several seconds to change to frequency display, and keep scrolling through the channels until you find the following frequencies
26.985 (ch.43L)
27.045 (ch.49L)
27.095 (ch.54L)
27.145 (ch.59L)
27.195 (ch.64L)
Go to each of these frequencies and save it to the memory button of your choice, unfortunately the Cobra does not have enough memory buttons for all of them, but the Midland has more memory buttons, maybe enough.
You should also be able to get the A channels for the lowers as well.
THATS IT, YOU NOW GOT THE A CHANNELS AND AN EXTRA BAND OF 40 UP IN 10 METERS. Remember not to transmit above 28.000 unless you are a licensed amateur using morse code, it really pisses them off and the FCC too as everything from 28.000-28.300 is morse, data and beacons.
You can get an extra band of 40 channels, 27.865-28.335 on the Midland 75-820, 75-822, and Cobra HH45-WX........this will likely work also on Cherokee AH-27, and other similar radios but tested on 75-820 and HH45.
I also discovered how to get the 5 alternate, "A" channels.
3A, 26.985
7A, 27.045 (wreak havoc on kids cheap RC cars)
11A, 27.095
15A, 27.145
19A, 27.195
It is really simple, but first you must modify the radio for 120 channel (export mode)
For the Cobra HH-45,
http://www.worldwidedx.com/radio-radio-related-modifications/101454-cobra-hh-45wx-channel-mods.html
For the Midland 75-820 or 75-822,
Bill's CB & 2-Way Radio - Midland 75-820 Modification information
Now that you soldered the jumpers and RESET the CPU for uppers and lowers.....continue, the rest is just pushing buttons
Go to channel 40L
Now the hard part,
You must hold the channel down button for about 5 seconds or until it starts rapidly going through the channels, basically hold it until it starts beeping more rapidly.........and keep holding it.
As you are holding channel down button, you should see the channels are now 80H, 70H, 60H, 50H, 40H.....and so on..........
YOU MUST STOP ON CHANNEL 80H, its a trick, you might want to get your video game addicted son to do it for you, what I do is let go the button when it says 10H, because by the time I release it its gone to 80H.
Once you got it on 80H, press channel up button until you get to channel 88H...DO NOT GO PAST 88H OR YOU MUST REDO
You got it on 88H, GOOD!!!! now save it to a memory button.
For Cobra HH-45, Press "FUNC" once and then hold the memory button of your choice, I used M4 on my Cobra.
THATS IT FOR 27.865-28.355, which are now channels 41H-88H.
You can see the frequency by holding the "FUNC" button for several seconds.
Now to get the 5 "A" channels.
Go to channel 40
Now the hard part, just like deja-vu all over again.
You must hold the channel down button for about 5 seconds or until it starts rapidly going through the channels, basically hold it until it starts beeping more rapidly.........and keep holding it.
As you are holding channel down button, you should see the channels are now 80L, 70L, 60L, 50L, 40L.....and so on..........
YOU MUST STOP ON CHANNEL 80L, its a trick, you might want to get your video game addicted son to do it for you, what I do is let go the button when it says 10L, because by the time I release it its gone to 80.
Actually, channel 70L might work, or even 50L or 60L because its still in that range, but I havent tested it with another channel.
Now save the channel to memory, just in case you screw up so you dont have to do it over again.
Now hold the "FUNC" button for several seconds to change to frequency display, and keep scrolling through the channels until you find the following frequencies
26.985 (ch.43L)
27.045 (ch.49L)
27.095 (ch.54L)
27.145 (ch.59L)
27.195 (ch.64L)
Go to each of these frequencies and save it to the memory button of your choice, unfortunately the Cobra does not have enough memory buttons for all of them, but the Midland has more memory buttons, maybe enough.
You should also be able to get the A channels for the lowers as well.
THATS IT, YOU NOW GOT THE A CHANNELS AND AN EXTRA BAND OF 40 UP IN 10 METERS. Remember not to transmit above 28.000 unless you are a licensed amateur using morse code, it really pisses them off and the FCC too as everything from 28.000-28.300 is morse, data and beacons.
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