Showing posts with label hifer. Show all posts
Showing posts with label hifer. Show all posts

20 Feb 2024

22m ISM band WSPR receive - the so called hifer band (Tuesday)

It is my view following emails with OFCOM that in the UK we are all free to experiment on the ISM bands without a licence or callsign as long IR2030 and any other rules are followed. We have to cause no undue interference and must accept any interference. 

In the UK, this band is mainly used for RFID tags and short ranges. In the UK on this band the power limit is 10mW ERP. Clearly it helps if you use a unique callsign that WSPRnet can use so you can see where your QRPP signal is being received.

On 10m, I have gone QRT and moved to the hifer ISM band at 22m, RX only.  I am monitoring 13.5539MHz WSPR, as always hopefully. 

Pretty sure than those that can transmit are limited to mW powers.

I am not sure what time is optimum to spot USA station on this band.

6 Feb 2024

HiFer 22m ISM band (Tuesday)

Once again, I am trying my luck with low milliwatts WSPR on 13.5539MHz in the HiFer band using ISM restrictions. For the last 2 days I have been spotted in Europe, but not in the USA. Always hopeful!! 

UPDATE 0944z:  Spots by OE9GHV/Q (871km).


UPDATE 1711z:
3 European spots again, but nothing from the USA.

4 Feb 2024

22m (HiFer) ISM band (Sunday)

 Keeping to the ISM rules (very low milliwatts) I am on 13.5539MHz USB dial QRPP WSPR.  Any reports (local or DX) appreciated.


UPDATED 1200z:
I am totally surprised!  3 EU stations have already spotted me! I was not expecting HiFer spots from Europe.

UPDATE 1225z: The chances of me spotting others is very low. The 17dB attenuator is in circuit on RX too, so if a station is running low mWs it would effectively be running 17dB less for me!

UPDATE 1629z: All my 22m spots (lots!) have been by 3 Europeans. My gear will remain on 22m (HiFer band) for several hours. It is not clear to me when my best time would be to be spotted in the USA. It seems my chances will diminish after dark?  I am no propagation expert.

UPDATE 1714z:  Looks like I have missed my chance of being spotted in the USA on the HiFer (22m) band today. I was quite hopeful as with the same small power I had been successful on 10m every time I tried recently. I guess local noise levels could be more of a problem as the frequency is reduced?  On very weak signals, I could just be buried under noise!

UPDATE 1757z: My last 22m spot was over an hour ago. No USA today then I think!