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Rooster CW Transceiver Rev3 

Page 21 of 26  

22

nd

 Nov 2023 

 

seen between units, this variation will only be 1dB or so and will not be noticeable to anyone 
receiving your signal. 

Current draw will be around 20mA on RX, and 400mA TX (@12v) 

Now connect the Rooster to an antenna. If nothing else you will hear band noise. 

Adjust the RIT to vertical and call CQ, if called back adjust the RIT for best reception and enjoy the 
QSO. 

Notes  

All direct conversion type receivers can suffer from noise and other issues when used with a mains 
power supply. We recommend that the Rooster is powered by a battery pack. We have used and 
would recommend a 3-cell lithium-ion battery pack that gives just over 11v. the Rooster still 
produces around 1.5 watts at this voltage and will operated for a very long time with such a power 
pack. A 7Amp/Hr 12v lead acid battery is also a good choice. 

Other 40m band frequencies can be used by changing the Crystals, if you are only moving by a 
couple of KHz then you will be ok just changing the mixer crystal (Y1) if more then you will need to 
change all three crystals to the same frequency.  

 

Audio Filter Response 

The Rooster unlike many such simple transceivers uses an active audio filter, the filter makes use of  
the spare op-amp in the dual op-amp used in 
the audio amplifier. This is centred around 
750Hz and has a bandwidth of  500Hz. 

The filter is certainly NOT a brickwall but 
does give a useful peak of about 12db to its 
centre frequency, here is a waterfall showing 
the filters response. We used a Kanga RF 
Noise source module for the input to the 
transceiver and used a waterfall display to 
see the response.  

The Rooster, as you would expect has a LPF on its output . We have included 2

nd

 and 3

rd

 Harmonic 

traps too. Here is an example of the RF output spectrum, this was supplied by one of the Beta 
builders at the RSGB Convention. 

We hope you 
enjoy building 
and using the 
Rooster. Any 
questions or 
comments to 

sales@kanga-
products.co.uk

 

 

Summary of Contents for Bassinet

Page 1: ...l controlled Transceiver Direct Conversion Design Part Pre installed SMD design Only 20 parts to fit No coils to wind Single Frequency Crystal controlled operation Front panel RIT control approx 2 Wat...

Page 2: ...nsmitter also shares the NE612 oscillator and buffers the VFO signal before feeding it to a high gain PA stage giving approx 2 watts of RF The kit uses a mix of SMD and though hole parts ALL the SMD p...

Page 3: ...Q5 1 2N4401 Transistor Q5 Diode 1 44V 1N4755A D3 Parts Pack Section 3 NE602 1 Mixer IC on adapter board IC1 4 Way Strip Pins 2 Mixer Mounting Pin Strips Strip Pins may be fitted to IC1 IC Socket 1 8...

Page 4: ...miliar with the main PCB You can see many parts are pre fitted for you there are about 20 parts left for you to fit Some of the parts are close together so you will need to take extra care when solder...

Page 5: ...n first on the bottom of the board and checking the part is correctly fitted once you re happy that it is right solder the remaining two other pins Here is what you should have now The 3 legs are now...

Page 6: ...lug needed The current consumption should be just a few milliamps the overall finished receiver will be around 20 25mA when complete On the front edge of the board you will see the position for the RI...

Page 7: ...l not line up with the holes in the front panel later Solder just one pin on each socket first then double check the alignment When sure they are correctly aligned and flush solder the remaining pins...

Page 8: ...etal screw driver on Pin 5 of the position for U2 If you touch the shaft of the screw driver you should hear a loud buzz in the headphones Repeat the test but this time touch pin 4 of the U2 position...

Page 9: ...n the board over to solder it Solder one lead first and re check its still sat down correctly on the board When happy solder the second leg and trim the leads flush on the board The next part is a tra...

Page 10: ...IF you wish you can test the muting circuit too at this time Perform the Buzz test again but while listening to the Buzz tap the key The sidetone should replace the buzz Stage 4 Mixer The Rooster use...

Page 11: ...eristics are different between the two types you have with the kit For the mixer we need to use the shorter crystal This is to be fitted between the chip socket and the trimmer as shown above The Mixe...

Page 12: ...e done RF Noise Test Now make sure that the chip is plugged in the socket the correct way round it didn t matter when you soldered the adapter board and pins but it DOES matter now The adapter board h...

Page 13: ...sure it is fitted to match the outline on the PCB and that it is sat squarely as per the picture here We now will fit a protection diode that will help protect the PA from high SWR This is D6 1N4755A...

Page 14: ...ge it is hard to remove parts once fitted L1 is a 100uH inductor The inductors used on this kit use the same colour bands as resistor to identify their value so you can use the colour resistor code ch...

Page 15: ...they will then fit correctly on the board Here are the inductors fitted to the board Make sure yours are fitted flush to the board and that the leads are trimmed flush on the back of the board Stage 7...

Page 16: ...Socket Now the finial part maybe the hardest to solder The Antenna BNC socket The antenna socket is a heavy item it is made from metal and is really a big heatsink It can be difficult to solder the mo...

Page 17: ...the this set Select a wide filter BUT be sure you put the radio in CW mode Important Connect the Rooster to the power supply with the key antenna and headphones connected You should now hear at least...

Page 18: ...PA transistor and the RX TX LED the Rooster PCB is complete Stage 11 Fitting the PA Transistor and rear panel First find the heatsink mounting pad It should be noted that the type of transistor does N...

Page 19: ...egs each one is a different length When we fit this part the shortest leg MUST be towards the centre of the board You need to bend the legs at approx 13mm from the back edge of the LED s body You want...

Page 20: ...of 7 030Mhz Set the receiver to 7 030 and adjust the trimmer to correct the frequency You MAY not be able to bring the frequency bang on 7 030 you may only get within a few hundred Herts of that targe...

Page 21: ...nd frequencies can be used by changing the Crystals if you are only moving by a couple of KHz then you will be ok just changing the mixer crystal Y1 if more then you will need to change all three crys...

Page 22: ...Rooster CW Transceiver Rev3 Page 22 of 26 22nd Nov 2023 Circuit Diagrams...

Page 23: ...Rooster CW Transceiver Rev3 Page 23 of 26 22nd Nov 2023...

Page 24: ...Rooster CW Transceiver Rev3 Page 24 of 26 22nd Nov 2023...

Page 25: ...Rooster CW Transceiver Rev3 Page 25 of 26 22nd Nov 2023 Board Layout...

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