14 R HXG KK3F ARL 10 FROSTBURG MD Jun 30
JOSEPH DURNAL NE3R
123 STREET ADDRESS
FREDERICK MD 21703
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ARL FIFTY THREE 70 HAD
A GREAT FIELD DAY 73
The BT is a Morse code prosign for break and the /EX is what a digital text formatted message has to have at the end so that the system knows where it ends.
This message uses a format known as ARRL numbered radiograms. The FIFTY THREE stands for Received your _____. It's appreciated; many thanks. In this case, the 70 fills in the blank, which is the message number I used when sending Pat a message on ARRL Field Day.