Whereabouts of early Korean hams in U.S.A. and Canada.
    Pictures of some early Korean ham stations. 
   QSLs of early Korean ham stations
   Pictures of some early KARL activities.

Both D.I. and Jane Cho have been licensed Ham Radio operators in Korea and U.S.A.. Although Jane did not get U.S. license, D.I. sill holds his U.S. license. 

D.I. was one of pioneer of Ham Radio in Korea and played an important role in organizing the Korean Amateur Radio League (KARL) in 1955. In 1960, he began operating one of the very early Ham Radio stations in Korea (10th. - Call Sign : HM1AJ), communicating with other Ham Radio operators worldwide. In 1970, he became the 3rd. President of KARL, and held that position until 1973, when the Cho family moved to the United States.

KE6AJ is D.I.'s current call sign, though he has quit the operation and closed his ham radio station down after his last contact with Korea on 4/29/00 . He previously operated under KB6IR in U.S.A., and before that, HM1AJ in Korea.

If you are not a ham and interested to know about HAM RADIO, click left button.

Following are some images from their life in Ham Radio. Click on each image to see a larger version.

D.I. wrote a series of article about the real story behind very early KARL of late 1950s through early 1960s in KARL monthly magazine from July 2001 issue through March 2002 issue. You can read it here clicking left image.

KARL지 2005년 4월호에서

지난 1959년 발행된 햄 관련 최초의 서적인 "HAM RADIO GUIDE BOOK"을 호주에 계신 이주우 (VK2C0) 님이 연맹에 기증하여 주셨습니다. 조동인(ex-HM1AJ)님이 편찬하신 이 책은 SWL 방법과 자격고시 대비 문제집, 그리고 법규와 각종 Data가 실려있읍니다. 도서를 기증해주신 이주우님께 감사드립니다.
D.I. and Jane visited KARL HQ on 4/18/01 and were interviewed by KARL Magazine. You can read the interview report here clicking left image.
This is D. I. Cho's QSL card of his ham radio station KE6AJ with station photo. QSL card is exchanged between ham stations, when the first radio contact is made, to confirm/certify the first contact. It contains his/her call letter, date/time of contact, signal report and some other pertinent information.
This was D. I. Cho's first ham radio station in U.S.A. - KB6IR, which was operated from 1979 to 1986 in Cupertino, California, until they moved back to Korea to join Samsung, with QSL card at upper left.
Here are D.I. and Jane, at their ham radio station, back when their call letters were HM1AJ and HM1AM respectively in Korea in the 1960s, with their QSL card at upper left.
  In his 40+ years in Ham Radio, D.I. has put up (and taken down) many antennas in two countries to transmit his signal. Here is a side-by-side look at two of those antennas.
Here is Jane at her Ham Radio Station in 1960 and her Ham Radio Operator License she got in April, 1959, while she was a college student. She was the first female radio operator in Korea, including professional as well as amateur...
...a distinction that got her on Korean television...
...in an English language newspaper...
...and a Korean language newspaper.
D.I. wrote a book about Ham Radio in 1965, the first book about Ham Radio published in Korea. Neither he nor publisher ever made money with this book, but it was published just to promote good understanding of Ham Radio in Korea, as Ham Radio was not known much in Korea yet in 1965. The second edition was published in 1973 and the third in 1991 by the demand of Korean hams. (You can read the book clicking left book image)
This is D.I's current U.S. Ham Radio License issued by FCC, the Federal Communication Commission. Both Operator and Station Licenses are combined in one simple form. 
This is D.I.'s old Ham Radio Operator License issued by the Ministry of Communication, Republic of Korea, on 4/25/59.
  And this is the HM1AJ ham radio Station License also issued by the Ministry of Telecommunication, Republic of Korea on 11/18/60, which was the historical date for D.I.
Back when D.I. operated under the call sign HM1AJ in Korea, he encountered many people in rather unusual locations. Here are some samples.
D.I. and Jane also have their Korean Ham Radio call letters on their automobile license plates.