Showing posts with label 9m band. Show all posts
Showing posts with label 9m band. Show all posts

Friday, January 20, 2023

EI9KP to carry out 34 MHz Propagation Tests on Sat 21st & Sun 22nd Jan 2023


Phil, EI9KP has announced that he will be carrying out test transmissions on the 34 MHz band (9m) band on Saturday the 21st & Sunday the 22nd of January 2023. The beacon will operate from 11:00 until 17:15 UTC on both days. The purpose of these tests is to investigate F2 layer propagation.

EI9KP will be transmitting on 34.013 MHz. The sequence of the beacon will be 2 x FT8, 2 x CW ID & Locator, short carrier.  The 2 x CW part is to help SWL's who do not use digital modes and also help during QSB cycles.

The beacon will be GPS disciplined with an output power of 1-watt. The antenna is a horizontal dipole with capacity hat loading.

To listen for this beacon, try 34.013 MHz CW or 34.0122 MHz USB.

Predicted Coverage Areas...


The map above shows the predicted coverage area for a 1-watt FT8 transmitter operating at 30 MHz. It's not quite 34 MHz but it's close.

It clearly shows the first F2 hop going from Ukraine, Romania, Bulgaria, Greece... to the far south of Italy and perhaps the far south of Spain and Portugal. The path to the Canary Islands looks particularly good.

To the west, the first F2 hop includes Newfoundland and the recent tests confirm this. Phil writes... "Larry VO1FOG reports receiving the beacon at 12:42UTC (his email time stamp) and all the way through till sunset, which for my QTH was 16:48UTC.  F2 layer propagation.  He reports that the signal was particularly strong about half an hour before sunset, to disappear all together at sunset. He reported a similar signal peak yesterday, just before sunset."

It's possible the second F2 payer hop might reach parts of the Caribbean and the SE of the USA.

Sunset for his Phil's location is at 16:54UTC on Sat 21/01 and 16:56UTC on Sun 22/01.

Reports to EI9KP on QRZ or you can leave a comment here.

Note that it may be possible for stations in western Europe to hear the signal via backscatter. Leave your radio on 34.0122 MHz USB and see if you can get a decode of the FT8 signal.

Tuesday, January 17, 2023

Trans-Atlantic opening at 34 MHz - 16th Jan 2023


Radio amateurs in Ireland have permission to use large portions of the low-VHF spectrum for experiments and Phil, EI9KP has been carrying out tests at 34 MHz which is the 9-metre band.

Phil conducted some tests during the Quadrantids meteor shower at the start of January 2023 and the results can be seen HERE.

With the rise in solar flux to over 230 and the rise in the maximum usable frequency (MUF) into the low-VHF spectrum, Phil conducted some tests on the 16th of January 2023 and his 1-watt beacon was heard across the North Atlantic in Newfoundland!

EI9KP writes... " I am delighted that the 1W beacon was received at 13:27UTC by VO1FOG in Newfoundland, Canada, a distance of 3145km/1995mi.  A first report from across the Atlantic, likely F2 propagation.  Thank you Larry for the report and sound clip.

Given high SFI next few days and possibility of F2 type propagation I will turn on the beacon again tomorrow Tuesday 17/01/2023 from 11:00 till 17:00 UTC. "

EI9KP's 1-watt beacon on 34.013 MHz is based on a RF Zero board with GPS stabilisation. The beacon is self contained in a die cast aluminium box with a 2x16 char. LCD display and a few status LEDs. The sequence was 3 x FT8 transmissions, then a CW ID and then a carrier.

The beacon antenna is also an experiment in that it is a shortened (capacitive hat) dipole with sliding end tubes that can adjust for frequencies from 32MHz to 60MHz.

More info in this previous post.



Update 17th Jan: VO1FOG also heard the test signal from EI9KP on the 17th of January 2023. The audio recording below shows the CW and FT8 signal.