About 50 people from throughout New Zealand and two from Australia will be at the lunch and annual meeting to celebrate a hobby which started in New Zealand more than 60 years ago.
Membership is not as strong as it was in the 1970s, the hobby's heydey, but keen Oamaru radio "DXer" Peter Grenfell said there would be a lot of nostalgia and plenty of tall stories at today's anniversary.
DX (long distance radio) member Paul Ormandy said members were radio enthusiasts who tuned into distant and unusual radio stations using a mixture of modern and old equipment, some dating back to the 1950s.
They recorded the stations they logged into.
The league was formed when Otago and Southland branches, with strong memberships, broke away from the New Zealand Radio DX Club, which eventually went into recess.
Other branches under the auspices of the league were formed.
Otago was the headquarters of the new league and Southland published the monthly magazine.
Oamaru also had strong membership.
When the league was formed in 1948, most New Zealand radio stations went off the air early, leaving people with no home entertainment.
Radio enthusiasts tuned into overseas stations, some of which even started to carry advertisements for New Zealand because of the number of listeners.
They also searched the wave bands for unusual and distant stations.
In recent years, that included FM stations.
However, modern technology including streaming broadcasts through the Internet, meant interest in radio had fallen.
Mr Grenfell said some members in the early days had returned from the war, where they had listened to overseas stations.
Many were involved in communications during the war.
At present, there were about 200 members in the league.
"There is still the romance of radio and operating old radios to search for stations," he said.
