JUMA Amateur Radio Forum

Hi, Juhani, This problem is usually caused when attempting to use the Ingenia loader without first settings the permissions. I am attaching a document I wrote some time ago explaining how this should be done. First make sure your serial port is working correctly. Before attempting to update your fir...

Version 2.00a changes the way that the EEPROM checksum is calculated and verified. NOTE: Because this version uses a different algorithm to calculate the checksum there will be a checksum error message on initial boot after loading this firmware. This will force the default calibration and configura...

Version 2.00a changes the way that the EEPROM checksum is calculated and verified. NOTE: Because this version uses a different algorithm to calculate the checksum there will be a checksum error message on initial boot after loading this firmware. This will force the default calibration and configura...

Hi, Laurent, Many thanks for bringing this to my attention. When updating from version 1.10q to a later version as the EEPROM mapping has changed this would normally cause a 'Checksum Error' message on initial boot, which would force the standard defaults to be loaded. If this did not happen then th...

Hi, Erich, There are a number of possible ways you can use the Juma TRX-2 and PA-100D with a computer. The first and simplest way is to set the PA-100D auto-band selection to the FREQUENCY SENSE mode. In this mode the incoming RF signal from the Juma TRX-2 will be measured, and the band filters auto...

This is essentially a maintenance build, but there are a few minor changes from Build 3. 1. As with Build 3, the maximum RF output power in the Calibration & Setup mode is now set with the attenuator at -3dB which means the maximum output power is 5W - do not exceed this . See the previous post ...

Hi, Erich, Whilst I have not interfaced my TRX-2 with the Tigertronics SignaLink USB, the Juma TRX-2 interface is essentially the same as my Elecraft KX3, and thus there should not be a problem. You will need the SLUSBKX3 interface cable. This has a 3.5mm plug for the microphone/PTT connections, and...

This version of the firmware, 1.20c Build 3 modifies the way the Rapid Band Switch feature operates, as well as the way the output power and power meter calibration is performed. IMPORTANT WARNING! Please read the section of the User Manual dealing with the RF Power Meter calibration - the maximum p...

This note discusses the emergency reset feature of both the Juma TRX-2 transceiver, and its companion PA-100D linear amplifier. The attached PDF document dated 23/APR/2015 corrects a minor typographical error. Over the last 4 years it has been brought to my attention that there have been (very rare)...

Hi, Bob, Many thanks! Some days the dragon wins! You are correct, I forgot to update the reference to an array pointer for the Splash Screen display in the Serial Test Suite. This version of Build 14, dated 19/APR/2015 fixes this carelessness. Glad I've got someone doing some thorough regression tes...