If you have been wondering how to get your Bitx to work CW then we have just launched a CW
Generator Kit. This Kit can be used externally housed in a plastic or metal case.
Please take following notes on working of the CW Generator.
CW: 700Herz
TONE GENERATOR
This kit can be used as a Morse Code Practice Oscillator
and as well as as CW generator for SSB transceivers like Bitx.
CW can be used in two ways.
1. By feeding the 700 hertz
tone, to the mike input stage of TX.
2. By unbalancing the carrier
by a positive voltage from this Generator, which unbalances the balanced
modulator.
Using
As a Morse Morse_Code Practice oscillator.
The generator has a side tone oscillator, from which the
keying can be monitored. An 8 ohms speaker can be connected to monitor sending of
CW.
Controls:
The following controls are available on board.
Audio Control:
Control
the audios gain of the side tone oscillator
Tone Control:
Control
the audio tone gains for the microphone TX input stage.
Carrier Balance: Provides a positive voltage to unbalance
the modulator stage in TX for CW
Delay: Adjust delay for keying CW as per speed required.
The generator can be powered by 12 volts from the TCVR
connected to with the 5 pins PC connector or by a 9 Volt battery. An On/Off
switch facility is also provided on the board.
The CW generator board can also be fitted in the
transceiver or transmitter case, the 10K trimmers should be used for this, the
5 PIN PC connector and the RCA connector can be discarded and wires soldered direct
on the pads.
For using CW there are two
methods, which can be used.
1. By
feeding the Audio tone 700 Hertz from Tone Control Output point,
to the SSB transceiver.
2. By
providing positive voltage from point Carrier Balance, the voltage is fed
to the TX Balanced Modulator stage to unbalance the carrier .
Power Source:
The unit can be powered by 9
Volt external battery or with 12 Volts from the transceiver being used. The
voltage from the tcvr comes through one of the pins of the 5 pin PC Connector
on board.
A OFF/ON switch can be used
when using the 9 volts battery or a jumper can be placed across the switch pads
to power it direct.
Connecting to Bitx.
The unit can be connected to
Bitx with the 5 PIN connector of the cw gen and the 4 PIN XLR connector of Bitx
with a shielded cable provided.
__________________________________________________________________________________
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| SCHEMATIC CW GEN |
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| BOARD |
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| BOARD |
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| BUILT UP CW GEN |
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| CW GENERATOR KIT |
CW GENERATOR KITS BOM
| COMPONENT |
VALUE |
QUANTITY |
|
|
|
|
|
|
|
|
RESISTORS 1/4 WATT |
10E |
2 |
|
|
|
RESISTORS 1/4 WATT |
18K |
2 |
|
|
|
RESISTORS 1/4 WATT |
10K |
2 |
|
|
|
RESISTORS 1/4 WATT |
2K2 |
5 |
|
|
|
RESISTORS 1/4 WATT |
3K3 |
2 |
|
|
|
RESISTORS 1/4 WATT |
4K7 |
1 |
|
|
|
LINEAR POTENTIOMETER |
10K |
4 |
|
|
|
DIODE |
IN4007 |
3 |
|
|
|
CAPACITOR DISC |
0.01UF |
9 |
|
|
|
ELECRTOLYTIC CAP |
47UF |
1 |
|
|
|
ELECRTOLYTIC CAP |
100UF 25V |
2 |
|
|
|
ELECRTOLYTIC CAP |
3.3UF 63V |
1 |
|
|
|
ELECRTOLYTIC CAP |
1uf 63v |
1 |
|
|
|
I.C.BASE |
8 PIN |
1 |
|
|
|
I.C.LM386 |
LM386 |
1 |
|
|
|
TRANSISTOR |
BC557 |
2 |
|
|
|
TRANSISTOR |
2N3904 |
3 |
|
|
|
CONNECTORS WIRE |
2 PIN |
2 |
|
|
|
JUMPERS |
JUMPER 0 OHMS |
4 |
|
|
|
5-Pin DIN Female Keyboard socket |
5 PIN |
1 |
|
|
|
5-Pin DIN Male Keyboard socket |
5 PIN |
1 |
|
|
|
CONNECTOR RCA |
RCA FOR KEY |
1 |
|
|
|
PRINTED CIRCUIT BOARD |
CW GENERATOR |
1 |
|
|
|
SHIELDED WIRE |
3 CORE 1.7 INCH |
1 |
|
|
|
Battery Clip Wire |
|
1 |
|
|
|
Speaker |
8 ohms |
1 |
|
|
| Trimmer Presets |
10k |
1 |
|
|
| Linear |
10k |
4 |
|
|
|
|
|
|
|
|
We are selling the CW Gen Kit on our ebay store, but there is some issue with ebay as we are not being able to
relist the kit, due to some technical issue.
The kit can be purchased from our Paypal Link below. After we have received your payment we shall ship the kit immediately and inform the tracking number.
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