27 July 2021
15 April 2021
there is short tutorial how to make Large signal modification on RGO ONE transceiver by Chris, G7DDN...
1. Remove top cover and disconnect speaker
2. Remove fan assembly - 2 screws on each side of heatsink
3. Remove two screws holding shield to rear panel - accessed through the heatsink
4. Remove 2 sunken screws in the side panels holding the shield in place to the chassis
5. Remove 2 screws through the PCB holding the shield to the PCB
After that follow the procedure which I posted over here:
14 April 2021
Some users complained of interferences caused by strong local broadcast station on LW/MW.
Boris, LZ2JR designed 7th order Chebyshev high-pass filter which was connected in line with the RX path. Filter effect though was inadequate and I was forced to look closer at receiver front end especially input point at RX/TX switch. Then realized that LPF diodes are not effectively cut off on RX so large signals can make them act like AM detector causing IMD problems. Adding pulldown resistor 100kohm would be enough for diodes to be reverse biased. (On RX cathodes see +13V). This way diodes and band LPF’s will be fully isolated from receive path and will no longer interact with incoming signals.
1. SMD resistor 5% case 0805 value 100kohm
2. Firmware update to version 2.20A for front panel and main board processors
Added pulldown resistor is 100kohm SMD case 0805 and is easily placed onto the two vias in LPF board. LPF board is located on back panel PA assembly and can be accessed after removing PA shield and then completely pulling off the PA module.
100kohm pulldown resistor
This modification needs new firmware 2.20A to be uploaded in RGO ONE FP and MB processors. FW 2.20A completely disengage band LPF’s from receive path. Current band LPF is switched on only on TX.
10 April 2021
09 March 2020
FA-VA5 is a high precision 600 MHz Antenna Analyzer for measurements of antennas, cables and other one port devices.
Vector’s measurement means that, unlike a scalar instrument, not only the SWR is measured and displayed, but also the value of the impedance, including the signed imaginary part. The so-called SOL (Short, Open and Load) compensation is used for the calibration of the device and provides precise measurements in different configurations.
07 January 2020
as you know the optional module of ATU is under finishing and the f/w code under tweaking for the RGO ONE.
One of the hardest point of the ATU performance - the very low impedance matching has been successfully tested on the beta test piece of RGO.
Look over here: https://youtu.be/aImge42dZZk
The antenna in use was an 80m band dipole. Tested band was 160m.
The ATU f/w code is still under tweaking and hardware is in beta testing to be sure that all will perform excellently in RGO ONE.
73 - Petr, OK1RP
Due to the high volume of inquiries recently received Boris, LZ2JR decided to post this google form which reserves the right to the user who filled in this form to get advantage ordering RGO ONE transceiver on “first come – first serve” basis.