Clik here to view.
Bitx Ver 3 Built By Paul Cotton
We are glad to share some great pictures of Bitx version 3 as built by OM Paul Cotton 2E0ELFfrom U.KPaul has built the Bitx 3 with The IK3OIL FLL Freq counter and VFO for 20 Mt band.Great job Paul,...
View ArticleClik here to view.
Bitx Version 3 B PCB's Components Layout
After much hard work for a few months the PCB's for the Bitx Version 3 B are ready. Very soon we will start accepting orders for the Bitx Ver 3 B Kits. The case is also ready we will be sharing the...
View ArticleClik here to view.
Pictures Bitx Version 3 B
At last we have the Bitx 3 B just about ready to be offered as a Kit.Its a great moment to share some pictures of the Bitx version 3 B .The pictures are of the Bitx 3B case, PCB set.. Exiter-PA-AGC...
View ArticleClik here to view.
Bitx Version 3 B Completed Pictures of Printed Circuit Boards
During past few days i was able to complete a Bitx Ver 3 B set Exiter and PA Board .Some pictures are being published here. The RX is working okay and the FLL seems to be correcting minor drift.I have...
View ArticleClik here to view.
Pictures of Working Bitx Ver 3B
It is a pleasure to present pictures for a complete working Bitx B . The Bitx Ver 3B has not been put on sale as yet, although i have sold 3 sets on request.Two radio amateurs are building the set...
View ArticleBitx Version 3 B SSB TCVR . Demo of RX
Here is a video i took last night for the Bitx Version 3 B in receive mode.I have taken some more videos which i will post soon.The receiver is quite sensitive and the VFO is quite stable. Since it is...
View ArticleBitx Ver 3 B RX demo
Some more new videos of Bitx Ver 3 B in receive mode.Bitx Version 3 B Demo 3Bitx Version 3 B Demo 2
View ArticleClik here to view.
Article 17
Posted here are some pictures of my second built Bitx3B this one is with agc working. The earlier agc pcb had to be modified. The present agc/s.meter pcb mounts on the vu meter.
View ArticleNew Ham Radio TCVR Minima
Om Farhan from India has come up with another Ham Radio project. The new project is named Minima, which means a project with minimum components.Minima is a complete ssb/cw tcvr with Arduino in it and...
View ArticleClik here to view.
Audio Mute Circuit For Bitx
Bitx had a problem of noise being generated on pressing the PTT button. The usual way of muting the PIN 3 of LM386 did work to solve the problem much, although to some extend, while working with...
View ArticleClik here to view.
Bitx3B VFO
The Bitx3B has a Varactor tuned VFO using MV209 and the stability is controlled with the Ik3OIL FLL Freq counter which has an inbuilt software to correct the drift in the VFO.Building a stable vfo is...
View ArticleExplanation of how the delay circuit works.
Om Blake Bartosh has shared with us the explanation as to how the delay circuit works as you may be eager to try it out on your Bitx. The Audio Mute circuit operates in the following way. The 555 timer...
View ArticleClik here to view.
Bitx3B VFO
The FLL frequency counter used for Bitx3B may sometimes not read the frequency from the Bitx3b VFO stage, the reason being the VFO buffer has a low output kept for the stability of the VFO. It is...
View ArticleBitx 3B PCB second batch
The second batch of Bitx 3b PCB now has the following changes from the first batch of pcb's made. 1. Q16 is not on the main exciter PCB now, instead we have a additional PCB of audio mute...
View ArticleClik here to view.
Bitx3B New built
Here are some pictures of my new built Bitx3B . This new bitx3b set is built on the second batch of PCB for exciter which has some minor changes.The VFO uses 2 number of T37-6 stacked . The results...
View ArticleClik here to view.
Stacked VFO coil for bitx3b vfo
Bitx3B VFO stage picture has been posted here. The Bitx3B VFO is made with two number's ofT37-6 stacked together and quick fix applied on it.The trimmer at control of FLL will need to be engaged at...
View ArticleClik here to view.
How to connect Bitx VFO with Ik3OIL FLL
Many friends had requested me to show how the Bitx VFO could be connected to the Ik3OIl FLL counter to stop the drift in the Bitx VFO.Presented here is a video and details as how to connect the Bitx...
View ArticleClik here to view.
Missing ground track in exciter, band pass filter stage.
Kindly correct the band pass filter stage in the Bitx3B pcb which has a missing track that should be connected between 39PF and ground for L1 and L2
View ArticleBitx3B VFO complete band coverage with zero drift
A new video of Bitx3B is being shown here, which has the following improvement:1. Full coverage of 20Mt band from 14.000MHZ to 14.350MHZ2. Zero drift with varicap tuning diode.The varicap is 1SV149 ....
View ArticleClik here to view.
Bitx Version 3C
For those of you wishing to build the Bitx 3 with ADE-1 Mixers the good news is that the PCB's are ready for the Bitx Version 3C. There have been no other changes in Bitx 3C The Bitx3C has been...
View Article