*INTERGALACTIC CBers
USE YOUR CB AT (38) 27.385 mhz LSB AS A DEEP-SPACE COSMIC RECEIVER
SOME OF THE BACKGROUND HISS YOU HEAR WHEN NO SIGNAL
IS PRESENT IS PARTLY FROM JUPITER, AND THE SIGNAL
LIKE SOUNDS ARE FROM THE BACKWASHS
OF THE MILKY WAY GALAXY.
*NOTE: 20db Gain CB Antenna System Required.
 Uniden™ PC66XL CB |
 5/8 Wave Base Ant. |
NOTES: From A 1st Class CB Operator
Alien-UFO Engineering..CB Antenna Super Scanner Old Or New Model.
Most of these now have bad cable-relay boxs and a control switch box..The three antenna elements & frame and the co-ax from each of the three elements is all that will be needed. Keep the old co-ax if possible splice them all together with your main 50 ohm co-ax to your radio this will make you a all direction ground plane. For a direction antenna remove all of the old 50 ohm RG58 co-ax, replace it with a homemaded co-phase harness built out of one RG59 co-ax 1/4 wave length for the front direction element(the signal will go in this direction), and two 1/2 wave RG59 for the two back elements this will make the two rear elements appear longer and will block the rear signals..Splice the two 1/2 wave coax into one PL259.. Connect a PL259 on the 1/4 wave coax and connect both PL259's to a common female tee coax connector and with a barrel connector to the 50 ohm coax going to your radio....
Nice looking antenna..I tried to improve the performance also built one just like it, but never could do any better than the factory unit..Performace was equal to a 1/2 ground plane at best and i gave it that rating because you could switch out local noise.
Long Barrel CB Beam On A 60+' Boom With
The mother of all CB radio beams
A Small Aluminum Tower For Center Support.
Built with a light weight aluminum TV tower (three sections) for the center boom that extends on each end up to 60+' long. We have 11 elements for the C.B. Radio band. Interchanging elements is fairly easy with the antenna elements muffler clamps mounts and a tilt over tower. The present position (movie image) shows 6 widespaced elements on the CB Radio Channel 38 = 27.385 Mhz LSB USA with the boom length adjusted at 50', the gain is 21db 70x power input with the boom set at 60+' with 13 elements and the bandwidth is only one channel wide. The Rohn support tower does twist in high winds with the 13 elements. The Antenna-Boom turns with a prop-pitch airplane engine starter mounted at the base of the tower.
The beam i like is the Big Gun 2 Cubical Quad with 14.5db gain.
The quad works the same as the Yagi only it does receive both horiz and vert (it you have it vert position it will also receive at lower gain hoziz signals) or the 1960's model hy-gain-Telex CB Big gun 2 had switchable horiz and vert. They look quite complex but if you have some aluminum, check around on the internet they are lots of designs showing you how to build them..The first quad was built for a station in Quito, Ecuador high in the mountains where the weather was so damp the yagi type low imp. antennas shorted out quite often..The quad loop antenna is high imp. and works great on the CB Bands. Here are few pointers from my notes that will help you fine tune your quad.. taper your wire size loops Starting From the back reflector make it 10ga, driver 12ga, 1st director 14ga, second director or front wire loop make it as thin as possible without it breaking...A four element Quad is the best all around size with a 3 element has 9db gain a 4 element has 12db gain, a 5 element has 12.1 so its not worth making a five element quad.. Quad antennas have a narrow bandwidth, a 4 element just barely covers the CB Band and making one with more elements narrows the bandwidth even more..Co-ax from the radio matching the quad loop driven element..To test this.. your High impedance CB Quad if properly matched to the co-ax should reject signals directly from the rear and not from the corners. Also receiving signals should be directly in front of the quad and not from the corners.
The CB Quad exhibit higher source impedance's at 100 ohms, the use of a 1/4 wavelength matching section of 70-to 75-ohm coax between the antenna feedpoint and the 50-ohm coax run to the shack will bring the terminating impedance to about 50 ohms giving a good match for the CB band.
The most often used spacing between the elements for the commercial CB quad is 6'..The ideal spacing for a 4 element long barrel 27mhz quad CB beam would be 10' on a 30' boom.
Co-Phase Three 1/4 or 1/2 wavelength base antennas!!
All active antenna elements directional ground plane.
An Anttron 305 or antron A99 a-99 and others like this the bottom half of the antenna is a matching device and the top section receives signals and are just about impossible to stack or phase them together...Before stacking any ground planes let me say if you want to save yourself some money and have a little more gain use a 3-4 element beam.
Requirements: Three CB ground plane antennas wavelength 1/2 (anttron 305, antron A99 a-99 antenna are a 1/2 wavelength antenna, but are very diffcult to stack), three coaxial cable assemblies of RG59 soild co-ax. Cut lengths.. Two-- 17' 9' 3/8" splice together into one PL259 connector and one-- 29' 7 5/8" install PL259 (the RF signal goes in this direction).. One common female tee coax connector with one barrel connector to connect 50 ohm coax to receiver, this makes up the co-phasing hardware..Install upto a 18' triangle.
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This is the most EXTREME CB MIC you are going to find. We are using this mic in our mobile, and it is awesome. With this mic, you have all the bells and whistles for your cb... This is the latest and best echo mic from RF Limited. As the name suggests, it's turbo echo to the extreme! In addition to the features of the EC-2018 Turbo, it has Endless Echo?, Stadium Sound?, Double Talker?, and a richer tone quality that can be best described as studio quality. To best describe the Double Talker? effect I have to mention the VC-300DX, or the Mobilemax. It is the same as their Slapback effect. Like the EC-2018 Turbo, the EC-2018XTR runs off of a 9 volt battery. I strongly recommend a stable power source from a 9 voltage regulator replacing the 9 volt battery (feeding the +12 vdc voltage from the radio via wire inside the microphone cord). Any respectable CB Shop can do this fairly easy. The most common wiring available is the 4-pin Cobra/Galaxy/Uniden/Magnum, although it can be wired to any radio on the market today. I've also tried one on a Uniden PC66L rig. It definitely has a studio quality sound on this rig. I've also used one with a Magnum S-9, setting the mic and the radio internal turbo echo to different settings in order to create a different sound effect with, awesome results. The mic is so clean it works well in conjunction with other echo boards. 
Sadelta Echo Master Plus Chassic Mods-TricksThe Sadelta can be modified in so many ways to improve the audio by removing the base microphone and installing a relay with a electronic hand microphone for more control. For longer delay keyoff sounds add a 10 mfd 25 volt cap on the transmitt pin for some radios. Replace the audio-echo sound slide controls with audio tapper controls, nitro light them and the two meters. Replace the 9 volt battery with a 9 volt regulator. If you don't like a hand mic replace the base mic with a commerical heavy crome goose neck with a pro microphone, several ham radio types can be found. Corba maded a wireless hand mic that i used to remote operate a sadelta echo base with a few tricks. A Sadelta base was designed to operate wide open to be loud-loud with no mods..Any 9 volt battery operated echo microphone can be maded voltage stable by replacing the battery with a 9 volt regulator this way once you set it they are no more drifting by the battery voltage dropping and your echo going crazy every few days. You can always bring the voltage up to the hand mic from the extra unused wire in your mic cord from your radio. VC-100™, VC-200 and VC-300-DX™I've owned all three of these and used them for years they worked fine on legal power CB Radios....Echo Repeater voice scrambler (VC-100) and the little secret was it could be used to descramble all types of communications (because of this it was remove fast from the market), echo, roger beeps, compressor, record and talkback in one. Or how about the VC-200 and VC-300-DX, with it’s melodies, key up record play back, roger beeps, echo, compressor, and talkback in one.Palomar VC-300DX Voice Recorder Built For CB RadioThe VC-300dx’s digital recorder allows the operator to record audio through the radio’s microphone. Once recorded and stored in the VC-300dx’s memory the message can be replayed over the air as many times as desired or until the message is erased, I used this feature with a "short key up burst" with my captured alien sound thousands of times. The Operator can also use the new “back-at-Ya” feature in conjunction with the digital recorder. The “back-at-Ya” feature automatically records and saves any received transmission at the touch of a button. The recorded message can then be transmitted back over the air immediately. Record and replay anything you hear on the airwaves at the touch of a button. It also has an audio mixer that allows the radio operator to mix inputs from recorded messages with the microphone. Give your transmissions a studio broadcast sound with fades, mixes and recorded background music. The echo repeater feature of the VC-300DX alters the transmitted audio by incorporating everything from a slight reverberation all the way to a full repeating slapback echo. Echo time and volume controls give the operator precise control over the amount of reverberation and depth added to a transmission. The VC-300DX has two end of transmission ‘roger’ beeps that can be selected from the back panel and turned on or off from the front panel. The selected sound will automatically play over the air at the end of a transmission. I purchased mine from www.copper.com and it was the only one i ever seen or even heard of so it was a very limited rare edition and it worked great.ASTATIC™ MOBILEMAX 2000™ The Classic MobileMax™ generates two distinctly different types of echos. Echo reverb and echo slapback™ effects with 9 different E.T.S. (Roger Beep - Courtesy Beep) sequential multi tone sound burst. A 6 second digital key up recorder. External speaker is needed for the talkback feature to work. There is an input jack on the rear of the unit for the receiver speaker output to be directed to the external speaker through the MobileMax™. A nice working horizontal LED bar graph displays the correct modulation level.The MobileMax™ is a true DSP (digital signal processor) system using 14-bit analog to digital and digital to analog converters. The classic mobilemax 2000 [first edition] is the one most people want. The echo repeater-recorder box works ok with legal power, and its mounted with Velcro to the radio (don't let the metal case touch each other to keep from RF Looping). NOTE: All new MobileMax processors made after August 2001 have only one ETS Tone (Roger Beer) and a 28 second recorder that replaces the classic model with a key-up 6 second recorder and the selectable roger beeps..This was a Big mistake by Astatic!! Because of this sales went to zero, and is no longer maded. D & J MODEL 20 A UNUSUAL ECHO SLAP BACK REPEATER Model 20 echo repeater from D & J Electronics was truely a wild CB Radio echo repeater box i used one for years. With all its faults of feedback from high power RF I rate this echo box as one of the best ever. 04/01/2008: Today listening to skip from South America theres a model 20 going full blast. I don't think they ever built one exactly the same, every one that i looked at had different parts. My model 20 had plug in chips with goverment surplus experimental echo-sampler-processor unmarked parts and a strange speaker wire for the 12 vdc power, the black wire with a white striped is for the 12 vdc +. No roger beep was in these units, they had a full blown repeater slapback echo audio with deep speech compression that sounds like no other echo unit ever made and to this day when i hear one in skip land it gets my attenion. ---Question Asked About The Model 20: April 06 2008 I was searching for rewiring info for 1 of these D & J model 20 echo boxes and found your site. Hello, The model 20 is a great echo box and i love to listen to them and is well worth the time to modify it for your CB..If you don't have a understanding of echo boxs and complex mike wiring you might try a CB Shop or a friend that does..As far as paper work, if you ever found a diagram it would probably be different as i never seen two alike, you will notice when you open the case it looks like half the parts are missing..These were maded for older type CB with relays, Its no problem to mount a little 12 vdc relay (Radio Shack) inside the box to work with modern CB radios..Only a few model 20 maded did have this relay installed on the board. If your running any kind of RF power the echo unit will squeal (RF feedback) this can be fixed by bypassing RF to ground on all the wires coming in and going out of the unit. A straight low 600-1k imp hand mike from the older Uniden CB radio works very well. Sincerely, Dr Ph.D CB Channel 11 AM MY FIRST ECHO BOX BUILT IN 1959This homemaded echo unit was used for several years.SIMPLE PARTS: 25 feet of water hose with a speaker at one end and a microphone at the other end..When i filled up the water hose with water the audio delay would be faster. Hmmm sound travels faster in water than it does in the air. This unit was copyed to make the famous wall of sound a few years later in the music industry. 1961 a newer version echo box was constructed by me using two speakers with a tooth pick glued across the center of each speaker cone with a screen door spring connected to the tooth picks. One speaker work as a speaker and the other as a microphone receiver this was a big improvement over the water hose, also i noticed that gravity waves contain information and shadows could go faster than light. This design was later used in the tweety Bird echo box. Time Machines Are Impossible?
Late 1960's and 1970's was the big advancement in echo time delays this was a spin off from the goverment space rocket, communication, Super Secret future-past time travel machine research programs with millions of dollars being spend developing the digital time delay storage chips that we find in our modern CB Echo box's today.
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| 1) 26.965 MHz | 9) 27.065 MHz | 17) 27.165 MHz | 25) 27.245 MHz | 33) 27.335 MHz |
| 2) 26.975 MHz | 10) 27.075 MHz | 18) 27.175 MHz | 26) 27.265 MHz | 34) 27.345 MHz |
| 3) 26.985 MHz | 11) 27.085 MHZ | 19) 27.185 MHz | 27) 27.275 MHz | 35) 27.355 MHz |
| 4) 27.005 MHz | 12) 27.105 MHz | 20) 27.205 MHz | 28) 27.285 MHz | 36) 27.365 MHz |
| 5) 27.015 MHz | 13) 27.115 MHz | 21) 27.215 MHz | 29) 27.295 MHz | 37) 27.375 MHz |
| 6) 27.025 MHz | 14) 27.125 MHz | 22) 27.225 MHz | 30) 27.305 MHz | 38) 27.385 LSB |
| 7) 27.035 MHz | 15) 27.135 MHz | 23) 27.255 MHz | 31) 27.315 MHz | 39) 27.395 MHz |
| 8) 27.055 MHz | 16) 27.155 MHz | 24) 27.235 MHz | 32) 27.325 MHz | 40) 27.405 MHz |