Question about Midland 4001 40-Channels Base CB Radio

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How do change the frequency on an old cb

How do change the frequency on my dad's old murphy cb

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If it has a PLL 02A chip they are not to hard to
trick is it hss any thing eleas it will be verry hard.
May be this will help







Posted on Sep 17, 2009

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Add channels to a to make it 40 channels or a web page thanks happy happy knew year and healty


I\'m assuming you\'re talking about converting an old 23-channel CB to a 40-channel radio.

You didn\'t specify what kind of CB you have so it\'s impossible to say for sure, but it\'s highly unlikely that this can be done cost effectively.

Most 23-channel radios used a set of 14 (6 base + 4 transmit + 4 receive) crystals whose frequencies were added together to result in the specific CB channel you were wishing to use.

Adding additional channels would require multiple sets of crystals and a replacement of the front-panel switch assembly that selected them.

This is a lot of work and expense, and you would be left with a radio that would either be missing channels - due to the peculiarities of CB channel assignments - or would include frequencies that you\'re not allowed to use. In either case such a heavily-modified radio would likely be illegal to operate.

Most - if not all - 40 channel radios use a newer digital synthesis technique to generate the frequencies needed, so their circuitry is much simpler and less expensive to manufacture. If you\'re wanting 40 channels, it\'s time to put the old 23-er out to pasture and buy a new one. Amazon has basic models starting at under $40.

Jan 02, 2015 | Radio Communications

1 Answer

How do I change a 28 frequency CB to a 29 frequency?


i have the crystals thousands it is a jc penny 23 channels would like to add it to 40 ?? little help please i only do to channel 28 22 14 19"

Jan 02, 2015 | Radio Communications

1 Answer

I have a cobra 29 brought in us want to change to newzealand frequency


Normally this would not be possible, but to do what you are proposing you would be hard pressed to find anyone that could do this. The us radios have built in diodes to trap out frequencies to keep them in the 27mhz bandwidth, so you need to find someone who knows radios inside and out with the proper circuit diagrams to work with.

Mar 24, 2012 | Cobra 29 NW CB Radio

2 Answers

I NEED TO KNOW HOW TO ENTER CODES INTO THE SCANNER


hi what do you mean by codes ,or do you mean frequencies ,to enter frequencies press the program key enter the frequency you want to listen too and press enter you can select different banks for different communications ,such as emergency,air traffic,marine,rescue,etc hope this helps

Jan 08, 2011 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

How do i find the FM frequency for a Connex CX-4300-300 CB radio?


FM is just a form of modulation, not an actual frequency. The frequency doesn't change between any of the modes (LSB, USB, AM, FM, CW).

For example, if you are on channel 19 (27.185MHz) on AM (Amplitude Modulation,) switching to FM (Frequency Modulation) mode you would still be at 27.185MHz, but using a different form of modulation.

Nov 10, 2009 | Connex CX-4300HP CB Radio

1 Answer

THE WIRES IN MY DAD'S OLD MIDLAND 77-106 MIC. HAVE BROKEN LOOSE


first check out the front for a circle with 27/81 this is the 40 channel (FM). if you cant find the circle it is (AM) and not used as much in the uk. if it means alot to you and your dad post it to cb communications shildon DL4 1HE and i will will see want i can do.

Jul 23, 2009 | Midland 4001 40-Channels Base CB Radio

1 Answer

Frequency


You would have to replace several components on the board(requires alot of soldering and the parts needed are a little hard to come by) in order to change the output frequency ranges. It is alot of work to do this and is probably not worth all the work, Best advice I can give you is to replace it with an AM one and sell it.

Hope this helps

Sep 11, 2008 | Cobra 29 LTD CB Radio

4 Answers

Bearcat BC-210


The Bearcat 210 Manual specifically states that the lowest freq available is 32MHz.

Jan 04, 2008 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

75-822 midland radio


You have a bad detector in the radio. Needs serviced. Change the bad detector diode and it should work. Good Luck
Ed
NC Electronic
Mills, Wyoming

Dec 15, 2007 | Midland 75-822 40-Channels Handheld CB...

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