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- SB SPCL @ ARL $ARLX021
- ARLX021 First 120 GHz contact
-
- ZCZC AX53
- QST de W1AW
- Special Bulletin 21 ARLX021
- >From ARRL Headquarters
- Newington CT July 13, 1994
- To all radio amateurs
-
- SB SPCL ARL ARLX021
- ARLX021 First 120 GHz contact
-
- First 120 GHz contact
-
- Tom Williams, WA1MBA, and Jim Mead, WB2BYW, have made what is
- believed to be the first contact on the 120-GHz amateur band. Their
- CW contact, over a 1.15-km path, was made with both in grid FN32rj,
- at 1214 UTC, July 11, 1994. They made contact first at a distance
- of 2 meters, then 200 meters, then 950 meters, failed to make
- contact at 1.9 km, and went back to the successful 1.15-km path.
-
- The two hams' equipment consisted of 11-GHz rigs fed into a harmonic
- mixer, using the 11th harmonic to produce 10 microwatts of 120-GHz
- output into 0.3-meter dishes. The mixers were commercial units
- built by Pacific Millimeter Products, and the dishes were on loan
- from the University of Massachusetts.
-
- These two hams made contact on 145 Ghz in 1993, and point out that
- 120 GHz is more difficult because of the oxygen absorption at that
- frequency. Happy with their successes, Tom and Jim are already
- talking about the possibility of trying 245 GHz next year.
-
- When asked for advice to others who would try worked the superhighs,
- Tom said, ''Read a lot. And plan your system carefully.'' Tom added
- that commercial mixers are very expensive (in the 1000 dollar(s) class), but
- that experimenters are starting to come forward with designs for
- home brew mixers at reasonable prices.
-
- Congratulations are due WA1MBA and WB2BYW for what appears to be a
- new record.
- NNNN
- /EX
-
-