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Roger Bleeps
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End of Tone Transmissions (ETT), 
'Roger Bleeps' or 'Beeps' sometimes refered to as 'Courtesy-Tones' on Amateur Radio, are a form of in-band signalling designed for 2-way radio systems.

Roger Bleeps are used as a way of signalling when a Transmission has finished and the prompt for the receiving station to Transmit.


NASA Space Agency were one of the first to use Bleeps 'Quindar Tones' during their Moon Landing Missions. NASA today use Bleeps with their Transmissions on the Space Shuttle Missions using the UHF band.


An electronic circuit generates the Roger Bleep tones, and each PCB produces a different tone, sound or frequency.

Multimode Transceiver manufacturers, Factory fitted Roger Bleeps into certain Transceivers, making for some very original and unique tones, some now "World-Famous"

Cobraworxshopz aim to show some examples of add-on Roger Bleep PCB's  


The original standard "Roger Beep" add-on PCB, the BANDIT has a single tone lasting approx 0.25 seconds at the end of a Transmission. Sometimes known as a "T Bleep" because of the 
morse code letter "T" or (Dah). 
The Bandit has a similar sound to the Roger Beeps used by 
NASA Apollo Astronauts.

The Bandit Beep uses a 14-pin DIP MM74C14N Hex Schmitt Trigger, which is a monolithic complementary MOS (CMOS) integrated circuit constructed with N- and P-channel enhancement transistors. The positive and negative going threshold voltages VT+ and VT-, show low variation with respect to temperature (typ. 0.0005V/C at VCC = 10V), and hysteresis, VT+ - VT- is greater than or equal to 0.2 VCC is guaranteed.

The Bandit uses an OEG 5 Volt relay, the OUA-SS-105D (Blue) seen below

Click on the picture to hear a representation of the Bandit Bleep sound.


PCB Soldered Print-side of The Bandit is shown below



The A-Tone or Road Runner Bleep is a slightly more advanced version of the Bandit Beep. The A-Tone/Road Runner Bleep produces a short beep 'Dit' followed by a longer beep 'Dah' or the letter "A" in Morse code (Dit-Dah). The Bleep sounds like "Be-Beep" and was coined the 'Road Runner' for obvious reasons. The A-Tone duration is approx 0.40 seconds.

The A-Tone / Road Runner Bleep design uses two IC's, the first being a 14-pin PDIP MC14093BCP, Quad-2-input NAND schmitt trigger (on left side of PCB) Operational temperature range from -55C to 125C.

The second IC is the 14-pin PDIP MC14017B which is a five−stage "Johnson decade counter" with built−in code converter! High speed operation and spike−free outputs are obtained by use of a Johnson decade counter design. The ten decoded outputs are normally low, and go high only at their appropriate decimal time period. The output changes occur on the positive−going edge of the clock pulse. This part can be used in frequency division applications as well as decade counter or decimal decode display applications and Roger Bleep circuits.

Click on the picture to hear a representation of the A-TONE Bleep sound.


Notice the two large White coloured capacitors in the centre of the PCB above, the A-Tone version below has three (3) capacitors installed, displaying variations on the same PCB Bleep Design.


PCB Soldered Print-side of the A-Tone / Road Runner Bleep is shown below



"Avon calling"


A slightly different slant on the A-Tone / Road Runner Bleep is the AVON Bleep. The AVON Bleep produces a definate "DING-DONG" doorbell sound at the beginning of your Transmission, not at the end, like most other Roger Bleeps.

The AVON Bleep gets it's name from the famous door to door cosmetics company AVON, hence the DING-DONG Bleep. The AVON Bleep is approx 1.2 seconds in duration.

The AVON Bleep uses three (3) IC's, the first is a 14-pin DIL CD4013BC  CMOS DUAL D-TYPE FLIP-FLOP, the second IC is a 14-pin DIL TC4007UBP CMOS Dual complementary pair plus inverter and the third IC CD4020BE is a CMOS 14-Stage Ripple-Carry Binary Counter/Divider, in 14-pin DIL package.


PCB Soldered Print-side of the AVON Bleep is shown below





The KAY-Tone, K-Tone or just "K" is probably one of the most famous, if not the most World famous Roger Bleep ever used, as an add-on PCB. The K-Tone derives it's name from the letter "K" as expressed "Dah-Dit-Dah" or "-.-" in Morse code.

CW (Carrier Wave) Amateur Radio operators use the letter "K" as an abbreviation, similar to "Q" codes, QRZ or "Who's calling me?" for example. The letter "K" in CW means "over to you" or "your turn to Transmit" and is widely used by CW operators and Radio Amateurs working SSB (voice) Contests, especially useful if QRP! (very low RF output power)

The original and some would say the 'best' add-on K-Tones were made by "Wood & Douglas" a UK electronics Business, who are since out of the CB / Amateur market but now make other types of electronics. 

The K-Tone pictured below is not a Wood & Douglas version but instead one of the next best available. Relay switched and with three (3) extra controls in the form of variable 'pots' or controls. The first control was variable Volume output from the K-Tone Bleep PCB, the second control was the speed of the "K", variable from about 1-word per minute to about 500-words per minute. The last control or 'pot' was to adjust the Frequency or Tone of the K, variable from very low to very high pitched.

Click on the picture to hear a representation of the K-TONE Bleep sound.



Most Roger Bleep circuits are either 'on-board' or part of the main Chassis components alternatively an add-on PCB is installed inside the Transceiver, to reproduce the Roger Bleep required.

Roger Bleeps can also be mounted 'in-line' with the Microphone, instead of inside the Transceiver. This makes the Roger Bleep interchangable between your Transceivers.

Given all the needed hardware, an in-line Roger Bleep can be made in a Lunchtime. The below pictures show a K-Tone with on/off switch, 'thrown' into a metal box (very old) and wired for 8-pin YAESU.


The example shown below is of a K-Tone but any 
Roger Bleep can be wired in-line.


The Roger Bleep can be powered directly from the Transceivers microphone socket (if microphone +Ve supply line is present & within current limits) or can be powered from an external power supply via the power input cable on the rear of the Bleep Box. (RFi filter at each end of the power cable and on microphone cables) 


Roger Bleeps do not need to be installed into your Transceiver, as shown above they can easily be mounted in-line with the Microphone and Microphone Socket on the Transceiver.

Roger Bleeps are multi-functional devices, (used by NASA, US AIR FORCE, Emergency Services etc) that solve many problems and if nothing else add character and individuality to your transmissions.




The "World-Famous" HY-GAIN V Roger Bleep was one of the only add-on boards based on an original Transceiver's Bleep.


The Cybernet Multimode Chassis HY-GAIN V Transceiver has the most recognisable Bleep of any Transceiver ever manufactured.

The HY-GAIN V Bleep is like a 'Whistle' sound or described as a 'Pee-Witt'

The original HY-GAIN V Transceiver Bleep's circuit was part of the HY-GAIN V main PCB or Chassis (PTBM121D4X)

Over time several HY-GAIN V Bleep 'clone' add-on PCB's were produced. These varied in all aspects, PCB design, size and more importantly sound reproduction.

Only two of the 'clone' Bleeps were proved to be as perfect sounding as the original HY-GAIN V Bleep. 



HY-GAIN V Roger Bleep

During the 1980's Joe Delgado (J. D. Custom Electronics) manufactured a replica/clone HY-GAIN V roger Bleep add-on pcb, called the HG5B, shown below.


J. D. CUSTOM ELECTRONICS HG5B (HY-GAIN 5 BLEEP) was the first HY-GAIN V add-on pcb produced and in a limited quantity. Utilising passive components throughout, the relay switched Roger Bleep was made to last, infact the pictured Bleep, owned by one of our Customers, still functions and sounds 100% perfect today.


The potentiometer (variable resistor) seen in the top right hand corner of the HG5B (near relay and coloured wires) is used to vary the audio output level of the HY-GAIN V Bleep sound. Sadly Joe ceased production of the HY-GAIN V Bleep in the late 1980's. Working examples of the HG5B ISS 1 Bleep, such as the one pictured, 
are very rare and hard to find.

(New Age)

Just a decade after J. D. Custom Electronics stopped manufacturing the HG5B Bleep, a new, modern version was designed and produced. The new HY-GAIN V Bleep (Shown below left) is made with the latest SMT (Surface Mounted Technology) devices and as a result, it can replicate the Original HY-GAIN V Bleep sound perfectly. The pcb foot-print size is much smaller than the excellent 
J. D. Customs HG5B Bleep, see the below picture of the newer SMT version (left) and JD's early 1980's version (right).


30mm x 50mm


The HY-GAIN V Bleep board, fully SMT (Surface Mount Technology) only seven components, 6 Capacitors and 1 Relay are mounted on the component side of the PCB. All other components are surface mounted on the PCB print-side.


The HY-GAIN V Bleep PCB is so small (only 50mm wide) it can be easily installed in virtually any Transceiver.

****FOR SALE****
Roger Bleeps

The "World-Famous" HY-GAIN V Roger Bleep add-on board is  available now from in limited supply 
and custom built to order.


'Distinctive' World-Famous Bleep Sound.
Professional Quality Printed Circuit Board. (PCB)
Hand-assembled utilising the latest Surface Mounted Components
PCB & Components ROHS approved
Powered from +12 Volt DC supply
VERY low current consumption
Small size PCB only 50mm x 30mm !!
Relay Switched, can be used in virtually any Transceiver
Tinned, Colour-coded wires already attached
Supplied in Heat-Shrink Polymeric insulation
Assembled, inspected & tested 100% by our Technicians
Roger Bleep Sound is Perfect HY-GAIN V
Easy install for Cobra 148 GTL-DX / Superstar 360FM

Click for Hy-Gain V wiring guide

Please Note: Static sensitive device
Supplied in Anti-Static, Anti-Tamper packaging.

If you would like to purchase a brand new 
HY-GAIN V Roger Bleep, add-on board from

Please visit our eBay store at the below link:

Hy-Gain V Bleep for sale

Limited stocks !!


UK Price includes: Royal Mail 1st-class Recorded, Tracked and Insured delivery for our UK Customers.

International Price includes: Royal Mail AirSure, Priority-Airmail, Tracked and Insured for all our 
international Customers.

Any questions, please call or email
+44 (0) 7508-148-148



The FIVE-TONE Bleep, as the name suggests, has 5-Tones that are played sequentially at the end of the Transmission.

The FIVE-TONE Bleep PCB seen below has 2 IC's and 7 variable resistors (Blue)

The first IC is a CD4093BE CMOS Quad 2-Input NAND Schmitt Trigger and the second IC is a TOSHIBA TC4017BE Decade Counter/Driver . Operational temperature range from -40C to 85C.

The Blue coloured variable resistors (pots) on the FIVE-TONE Bleep are used for Bleep Volume, Bleep speed and also the FIVE pots in the lower right hand corner, control the Tone/Frequency of each of the FIVE Tones.

Careful adjustment of the Tone/Frequency pots can recreate a "Close Encounters of the Third Kind" Bleep sound.


The below picture is of the Print-side of the FIVE-TONE Bleep.




Quindar Tones, most often referred to as the "bleeps" that were heard during the Apollo Moon missions, were a means by which remote transmitters on Earth were turned on and off so that the Capsule communicator (CapCom) could communicate with the crews of the Spacecraft. It was a means of in-band signaling to simulate the action of the Push To Talk (PTT) button that is commonly found on 2-way communications equipment.

When the CapCom presses his PTT button to start a transmission, an intro tone (2.525KHz sine wave with a length of 250ms) is generated and triggers the ground station transmitters to send. And when he is finished talking and releases the button again, a slightly lower outro tone (2.475KHz, sine, 250ms) is generated to trigger the ground station transmitters to turn off. So in short, these are remote control trigger tones.


Click on the Mission Control picture below, open the file and listen to the MP3 

'Testing Quindar Tones'


In order for Mission Control (located in Houston, Texas, USA) to stay in contact with the astronauts as they travelled to and from the Moon, NASA used several tracking stations worldwide including the Goldstone Deep Space Communications Complex in California and the Canberra Deep Space Communications Complex in Australia as part of the Manned Space Flight Network. 


These stations were connected to Houston using dedicated telephone lines, which were very expensive to operate at that time. NASA had the option to build two separate systems for operating the transmitters - one to carry the audio from the CapCom and another to carry the control signal for the PTT button - but instead chose to combine these two systems together into a single system to keep down the cost of operating the network.

There are two common misconceptions surrounding Quindar Tones. The first is that one tone originated on Earth, while the second came from the transmitters used by the astronauts while in space. This confusion exists because many ground-to-space transmissions were initiated by Mission Control and responded to by the astronauts. In this sequence, the CapCom would press the PTT which would send the intro tone, then he would speak. When finished, the CapCom would release the PTT which would send the outro tone, and the astronauts would respond to Mission Control. Therefore, those transmissions would consist of a "beep", followed by Houston talking, then another "beep", and the voice of the astronauts.

Another misconception about Quindar Tones is that they were designed to signal the end of a transmission so that the other party would know that the transmission was complete, similar to a courtesy tone, roger bleep or end of transmission tone (ETT) used on many half-duplex Amateur radio repeaters. While a Quindar Tone did indeed serve this function for ground-based stations, it did not do the same for those in flight.




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