Bitx is an easily assembled ssb transceiver for all bands and for the Amateur Radio Operator-Hams, with very clean
performance.Hams can home-brew the QRP TCVR by Using ordinary electronic components.
We have our latest Bitx Version 3 pictures coming from Australia sent by OM Ross Bell VK3BEL .
Ross has done an extreme good job in making the Bitx 3 for 2 bands 7 and 14 Mhz and he plans to make
it for 3.5 Mhz also . Ross had purchased the Bandpass and low pass PCB from us and he is the first one
to use them . As more details come in from Ross I will keep posting for all friends.
Ross has already had a few contacts with his Bitx. He has some drift but that would be solved by using NPO capacitors in VFO.
Here are the pictures of Bitx Version 3 By OM Ross Bell VK3BEL
Pictures of the Bitx Version 3 Case are being published here to give a better idea how the case looks like.
The case in in metal G.I and in a combo color combination and complete single color grey will also be available.
The DDS Version 4 is an excellent project for using with any tcvr. Many Ham's are now purchasing the PCB and building the DDS 4 Project.
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PIC16F628A and AD9850 or AD9851. PIC16F628A is an 18-Pin microcontroller
with 2K byte program memory, it is a FLASH-based and a member of the versatile PIC16F62XA family of low-cost, high-performance, CMOS, fully- static, 8-bit microcontrollers. PIC16F62XA devices have special features to reduce external components, thus reducing system cost, enhancing system reliability and reducing power consumption.
Features
1. Range 0 to 70 MHz by 1 Hz step.
2. Freq setting in 1, 10, 100Hz, 1, 10, 100KHz, 1, 10 MHz by using a low
cost mechanical encoder with a variable tuning rate. 3. 2 rows X 16 character LCD display.
4. A 4 x 3 Keypad used for easy freq entry.
5. IF, CW, SSB offsets settings when used with Transceiver/ Receiver. 6. Software calibration to WWV or equivalent. 7. Two VFOs and split freq operation.
9. All settings are held in EEPROM and are permanent (but user can
change it any time).
10. 4 Band selection and 4 Mode selection outputs.
11. When operating below IF frequency, clockwise rotation of rotary
encoder decreases DDS out put frequency but increases the display frequency.
12. RIT operation.
The PCB for the above project were designed by Tony Fletcher of UK and also mentioned earlier on this blog. Since then many have build the DDS. Hopefully we will be publishing the info as how the DDS
work's with the Bitx, but it is a complete solution for a multi band Bitx.
The Latest to build the DDS 4 is G6AJW OM Dave Lucas from U.K who has very kindly granted me permission to publish pictures of his build DDS 4, he is also going to make the Bitx Vr 3 and hopefully very soon he would let us know as to how the Bitx 3 works with DDS Version 4.
Here are the pictures of DDS 4 build by . Dave Lucas G6AJW.
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