Thursday, September 9, 2021

More success on 10GHz

I am happy to show several more QSL cards for QSOs on 10GHz:

W8BYA
Rain Scatter - 515 and 519 km (322 and 324 miles)





WB0LJC

Direct Tropo 322 km (202 miles)



W0ZQ

Direct Tropo 318 km (199 miles)

Thursday, July 22, 2021

Rain Scatter on 10 GHz

We have made a bi-directional contact with W8BYA in Indiana, over 500km away on 10 GHz using Rain Scatter propagation. That's my current record on 10 GHz:




Friday, May 21, 2021

Microwave season again

The microwave season is back. I will attend several ham radio contests as usual. Also try to make some microwave contacts outside of contests. Note that for ham radio purposes, "microwaves" are all legal ham radio bands from 900 MHz up in frequency.

We have tried for TROPO propagation on 10 GHz between St. Peters (MO) EM48qs and Ft. Wayne (IN) EM70jt this morning at 7:00am CDT. Me (Herbert) AF4JF on one site and Gedas W8BYA on the other. About 335 miles (539 km). We didn't make a radio contact. It was too late in the day, the Sun was too high. It was also too early in the season. We will keep trying as long as needed.

I am set up for all ham radio microwave bands except 76 and 240 GHz now. Currently obtained new 2.4 GHz station from SG Lab in Bulgaria (click for details). Most of my activities this year will be carried out from the location I used today. It's a St. Charles County Park called College Meadows (click for details). This park opens at 7:00am and closes 30 min after sunset, but the gate stays open. The rangers and police from nearby college campus tolerate visitors when it's not dark. I have been walking my dog there as soon as 5:30 am. However, we do not want to wear out our welcome there, so activities in the dark without permission are out of question.

Several pictures attached:



View in direction of 60 deg. (NE)


My dog Darcey watching the equipment

My 10 GHz station set up

My car in the parking lot (empty this early in the day)





Wednesday, May 12, 2021

More 122 GHz success

This "news" is actually not new. It happened in December 2020. I have just received the QSL card from Harry WA0CNS. We have made first ham radio contact on 122GHz between the U.S. states of Missouri and Illinois.

This contact crossed a line-of-sight distance of 7.67km (4.76mile). The atmospheric conditions were not all that great. The relative humidity was still too high:

  • temperature 3.6 deg. C
  • dew point -5.2 deg. C
  • pressure 1005.2 mBar
  • humidity 51.1 %
  • wind speed 2.4 m/s
Signal from Harry was S9 with QSB to S5. Herbert's signal was much weaker on Harry's side (Herbert uses a 21 dB horn antenna while Harry has a dish).



Thursday, March 11, 2021

Contest results

I am not really attending contests to win, more for fun and to test the technology. However, it feels good to receive certificates like this one:




Friday, November 13, 2020

Success with Ham Radio on 122GHz

Harry WA0CNS and myself went outdoors to play with our new 122GHz units (about 500 microW of output power, 19dBi horn antenna on my side) on Saturday, November 7, 2020. We managed to make full contact using CW signals (Morse code) across the distance of 5.2 km (3.2 mile):



This frequency is extremely difficult, signal propagation depends heavily on moisture in the air. In theory, it should work better during winter months. We will keep trying for longer distances!

Some pictures of the stations used:





More details about our attempts on this contact can be found here (click on the link).

73 Herbert