{"id":8006,"date":"2017-08-15T10:10:00","date_gmt":"2017-08-15T00:10:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2017\/08\/15\/international-brotherhood-and-the-bitx-rigs\/"},"modified":"2025-07-21T23:53:39","modified_gmt":"2025-07-21T13:53:39","slug":"international-brotherhood-and-the-bitx-rigs","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2017\/08\/15\/international-brotherhood-and-the-bitx-rigs\/","title":{"rendered":"International Brotherhood and the BITX Rigs"},"content":{"rendered":"\n\n\n\n
<\/a><\/td>\n<\/tr>\n
Bore and Heriberto’s uBITX board<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Nowhere is the International Brotherhood of Electronic Wizards more evident than in the work on the rigs designed by Farhan. With the BITXs we see rigs designed in India that are now being built and modified all over the planet. Here are just a few examples of the global collaboration currently underway:<\/b><\/p>\n

In Italy, Giuseppe is putting a BTX40 on 20 meters and making it a dual bander:<\/span> <\/b>
<\/b> <\/p>\n

Hi everyone, I just completed some tests on a Bitx40 running in 20 meters band. I addes the 20 as secondary band activate when needed. I apply some mods to switch to secondary QRPLab BPF filter centered to 20 meters and removed the C91 and C92 caps to work in USB. I done some RX tests in the weekend of iaru hf contest to listen some stations Active.<\/span><\/i>
Here the issues registered:<\/span><\/i>
1) the 20 RX sensitivity was a bit weak compared to 40 meters. I need to increase volume. ( To receive the 20 meters the vfo run to 26 MHZ, mybe some stage suffers of poor performance in this High frequency?)<\/span><\/i>
I also tryed to increase the vfo over maximum allowed by raduino, using external buffer, but no results.<\/span><\/i>
Please read the issues as: work but could work better!<\/span><\/i><\/div>\n
2) the RX was not very clean: voice acceptable, but RX of Digital mode not very stable ( probably the cause could be the vfo shift for poor tuning control. I need to add lock function in firmware …) Or interferences for free wire of connection.<\/span><\/i><\/div>\n
3) Sometimes when switch on or change vfo to other band or mode, the bf amplifier start a self oscillation …Resulting in my wife’s screaming (the tests were also performed during the night!)<\/span><\/i><\/div>\n
No tests was performed at the moment in TX because i need to install the LPF for the new band.<\/span><\/i>
The firmware to make the test was a modified version of 1.17.1, few temporary mods to preset the vfo b to 14 MHz USB and correct the freq. Display.<\/span><\/i><\/div>\n
These my tests. <\/span><\/i>
Giuseppe Callipo IK8YFW.<\/span><\/i><\/div>\n
<\/i><\/span><\/div>\n
Pavel is a young fellow in Cuba who is doing great things with the Raduino software:<\/b> <\/span>

<\/span> \"My<\/span>

<\/b><\/span> Hi to all.<\/i><\/span><\/div>\n
The code was updated, the change log is this:<\/i><\/span><\/div>\n
v1.4Update to catch up with the features added in the Raduino v1.17.1 from Allard’s code (CW SPOT and bug fixes)<\/i><\/span><\/div>\n