The quickest and easiest way I have found to make a CB into a 10 meter beacon….. 

There must be millions of the older 23 channel CBs that use the 12 crystal synthesizer set-up with a 23 MHz oscillator and 14 MHz oscillator setup.    Check "Garage Sales & Flea Markets" for the bargain rigs

In this rig, the 23MHz signal mixes with the 14MHz signal to produce a signal in the 38MHz plus range. 
To receive, this 38MHz signal is mixed with the receive oscillator signal (11.730MHz) to have a signal that is 455KCs offset from the operating frequency.
Example… 23.290MHz mixes with 14.950MHz for the 38.240 frequency and then mixed with 11.730 to get 26.510MHz …. This 26.510 is .455 lower than 26.965MHz which is channel one..

To Transmit, this 38MHz signal is mixed with the transmit oscillator signal (11.275) to have a 26.965MHz operating signal.
Example…. For channel 23…. 23.540 mixes with 14.990 to get a 38.530MHz signal. The 38.530MHz signal is mixed with 11.275MHz for a 27.255MHz transmit signal.

Now find a crystal from almost any  40 channel PLL controlled CB…… the reference frequency crystal is 10.240MHz (Most common ….. almost universal use by manufacturers)...... actually, a 10.180MHz or a 10.000MHz will work equally well...... it just causes the beacon frequency to be a different channel to start at 28.290MHz (with the 10.180MHz crystal... this starts at channel 19)... and (with the 10.000MHz crystal.... this starts at channel 5)

Substitute the 10.240MHz crystal for the 11.275MHz transmit oscillator crystal.. Now, channel 1 becomes a transmit frequency of 28.000MHz. .
Channel 10 becomes 28.110MHz.
Channel 19 becomes 28.220MHz
Channel 20 becomes 28.240MHz
Channel 21 28.250MHz
Channel 22 28.260MHz
Channel 23 28.290MHz

With a little capacitance added .... the crystal will "bend" a few  Hertz either way. In parallel the frequency goes down ... in series, it goes up.  I like to use a "trimmer" in series for frequency "tweaking"....... 10 KCs easy.

The CARRIER output should be about 2 Watts after the "cans" in the transmit circuit are "tweaked" .....Do not adjust any of the "cans" except those that "follow" the TRANSMIT OSCILLATOR  to the output.   

Typical adjustment locations

Currently the Ten meter "beacon band" is considered to be 28.175 to 28.300MHz
The FCC rules only state that if the beacon is automatically controlled… it must be 28.200 to 28.300MHz…..  Please refer to a current listing of ten meter beacons to select a frequency.  

A short piece of Co-Ax connected to a receiver tuned to 28 MHz frequencies can be used as a "sniffer" when tweaking the "cans"..... watch the S meter and adjust the "cans" to the highest reading at the selected beacon frequency.

To transmit a CW signal, a person only needs to interrupt the PTT circuit of an AM rig. 
There are many ways to "key" the PTT circuit……. Any memory keyer …. Computers….

---- MEMORY KEYERS?    There are many memory keyers on the current market. One good Deal on the market is the "TICK 2B" at 15 dollars for the SMT kit with 25 character memory for beacon operation.   Takes "close" eye work and a steady hand.

BEST DEAL...... PICOKEYER by NØXAS     http://www.botkin.org/dale/pic_keyer.htm....  currently $10.95 for the Chip and Socket.......With 62 memory characters.    Minimal external parts....... "breadboarded" in less than 15 minutes.  (please check the latest... I think the memory is now doubled and the price is less that 10 dollars)

 opinions... not a commericial !