Earlier this week, I achieved two firsts in one QSO: my first contact on the 17m band (a 100Khz slice of spectrum starting at 18.068 Mhz), and my first contact with Brazil. Specifically, with PY6JB, JOÃO, in Salvador, Brazil, nearly 5000 miles Southeast of me. I’m not positive, but I think this marks my furthest contact on the air so far.
That I set a new personal distance record with JT65 is not surprising – the mode is designed for weak signals and long distances. It encodes up to 13 characters into a highly compact format of 72 bits. These are then run through a pair of Reed Solomon encoders, which translate the user data into a set of 126 bits for transmission with significant potential for error-correction. Reception of signals more than 20 dB below the noise floor is not uncommon with JT65.
As you can see in the screenshot of the popular JTDX program by UA3DY, even transmitting at around 35 Watts, my signal was still 17 dB below the noise floor by the time it got to Brazil. But that was enough to exchange callsigns and reports, and officially verify the QSO.
So, another new country in the log, and my first ever contact on the 17m band. Not a band way to spend a Monday afternoon.
Hear you on the air!
*UPDATE: The same afternoon I posted this, I made another contact with Brazil, but this time on CW – PV8ADI! Woohoo!