“In this video, I do a bit of wiring and then get on the air and make some contacts during a contest.”
The Raduino The new BITX40’s Raduino is an Arduino Nano powered, small, hackable board based on the rock steady Si5351 synthesizer with a clean 16×2 frequency display, free and open source code, 6 analog ports, three oscillators and six digital lines.
Receiver The listen to the very clean, crisp and quite receiver. The front-end has a triple tuned circuit that cuts out-of-band signals. The diode ring mixer front-end makes this a crisp receiver that doesn’t overload easily. The all analog signal path to your ear provides outstanding signal clarity that is to be heard to be believed.
Transmitter 7 watts of low distortion SSB provides you with enough juice to have thousands of contacts on 40 meters, daily rag chew and occasional DX chasing. Any common 2 ampere 12 linear volts supply will provide enough juice for this transceiver. Or you could simply run it from a battery!
The BITX40 will inspire you to experiment. Modify it, mount it, tweak it, change it.
Raduino is a standard Arduino Nano that makes it easy to write code in simple C language to work on more modes, bands, utlilities. RIT, dual VFOs, more bands, CW/RTTY are just some code away! who will be the first to the Raduino keyer?
The main board uses all analog large sized SMD components that are laid out on an easy to understand manner on a double sided board with broad tracks. This can be your main module around which you can start experimenting. There are jump-points from where you can add more modules like the DDS, more bands, better audio amplifier, etc. Imagination is your limit. You can separately increase the power amplifier’s supply voltage to 25 volts to be more than 20 watts of power : You will have to add a better heat sink. The mods are on the way!
The boards can be installed inside any box that you like. Make your own station rigs, man-packs, SOTA rigs, trail radio or mount it in a cigar box and leave it on your bedside table. Watch the instructions video.
We have tried to include connector/hardware you might possibly need to build a full radio. However, we also had to balance the shipping weight to keep the overall cost down. You will have to supply your own box, power supply and earphones/headphones/speaker.
- 4-1/2 inches by 5 inches tested SSB transceiver module, covering any 400 KHz segment of the 7 MHz band
- The Raduino board with Si5351, Arduino Nano. Fully tested
- High quality BNC connector for the antenna
- Small electret microphone
- Two earphone style audio jacks for the mic and the earphones/speaker
- A set of DC power socket and plug
- Volume control with on/off switch
- 10k linear pot for tuning
- 8 Brass stand-offs with mounting nuts and bolts
- Connectors with wires for all connections on the board
* Note : A speaker is not included in the kit as earphones/headphones/speakers are easily available locally. No cabinet is included to save on the postage cost. Almost any box maybe used.
The BITX boards are hand assembled by a collective of women. Each of the toroids is hand wound. This provides these women with livelihood. The assembled boards are then DC checked a final RF check is performed to check the receiver’s sensitivity as well as transmitter’s output before being shipped. Each board is individually numbered.
HF Signals is founded by Ashhar Farhan, VU2ESE as a part of Paradigm E-commerce Pvt. Ltd to encourage people all over the world to get more active in amateur radio, analog electronics and self-learning. Building and modifying radios is a great education. Lack of access to elmers and and radio builders’ community, absence of test equipment : all impede the spread of homebrewing. With the BITX40, we hope to recover that ground and encourage more and more people to get on air, modify, experiment, build and learn. So, go head, make that mod you wanted to.
Does your neighborhood forbid antennas but allow flagpoles? Is tearing up your lawn to lay 64 radials not an option? Or maybe you just want a high-per... Read more
Icom Mobile Antennas AH-760, Wide Frequency Heavy-Duty Moving Coil Antenna 200W PEP SSB, 125W PEP CW/DATA 1.6MHz–29.999MHz wide frequency coverage wit... Read more
Force12 Antennas – A super-compact dualband 7/10MHz WARC band Yagi with single feedpoint The 4-LFAR-40/30, an Excellent super-compact Du... Read more
Introducing the SteppOut Vertical High-performance 1/4-wave HF Antenna From 14 to 30 Mhz By Bill, AA4BQ
From price to performance, the SteppOut Vertical is a true 1/4-wave vertical for 20-10m and for under $50! Let’s have some fun. The end product... Read more
FlexRadio Systems and Marcus Roskosch, DL8MRE announced today a partnership to develop, market and sell a client interface application for both iPad®... Read more
Yaesu FTM-3207DR and FT-2980R will be available late summer / early fall! Yaesu FT-2980R 80W FM 2M Mobile Transceiver As its model name suggests, the... Read more
Alianza DxB “We are proud to introduce the Alianza DxB which is the latest device created by the Northern New Jersey, family owned technology co... Read more