52 Week Ham Radio Challenge 2025 - Week 39: Make a 2-way contact with an output power of 100 mW or less.
Challenge for 2025-09-22 - 2025-09-28:
Category: ๐ป - Difficulty: ๐
Make a 2-way contact with an output power of 100 mW or less.
Any band or mode is allowed. If your radio does not allow setting such a low power, go with the lowest you can, or use an attenuator!
Who manages to achieve the longest distance?
Toots mentioning this challenge
| Date | User | User score | Status | Toot summary & link |
|---|
| 2025-09-07 17:43:38 | g7kse@mastodon.radio | 35 | Success! | Both HC39S and HC50S done. 50 is about a 100mW QSO and 39 is about APRS.My LoRa APRS tracker uses a Heltec tracker module. It's 100mW output & has made it an impressive 85 miles from Seatallan summit before it was gated. This is on the 433MHz band.I also use a similar module for Meshtastic. Which gets used quite regularly for text chit chat. Mostly across the Irish sea to the IoM. This one is 868 MHz.I think I need to try a CW contact as well. Just need an attenuator. |
| 2025-09-21 11:29:54 | ian@mastodon.radio | 37 | Success! | Ham Challenge Week 39 is to make a contact on 100mW or less! The only radio I have with an on-screen display of Tx power in Watts is the X6100, so I set it to 0.1W and gave FT8 a try. Bit of a faff with audio levels and CAT ports as expected but I got there!#HamChallenge HC39S |
| 2025-09-24 10:46:56 | bgarfoot@kind.social | 21 | Success! | Week 39 of the actually proved to be more fun and fruitful than I thought. I set my radio to 100 mW on 40m FT8 (since that's really all that's open this time of morning), and got 3 contacts back:K3GB at 735km awayKO4LU at 825km awayand W1LBW at an impressive 1105km away!I might try again later on 30m or 20m, but for now, a big HC39S!#amatuerRadio #hamradio |
| 2025-09-27 21:27:48 | ei7ijb@mastodon.radio | 9 | Working on it... | For the 39th challenge, 'Make a 2-way contact with an output power of 100 mW or less.โ, I donโt have the ability to go that low in power. #hamchallenge HC39 @hamchallenge |
| 2025-09-28 14:32:25 | M0CUV@mastodon.radio | 3 | Success! | After rebuilding my loft fan dipole and tweaking it for resonance, I reduced power output to 100mW, on 18mHz, and was heard over Europe and in the USA.. and successfully completed a contact with EB1GUA, Valladolid, Spain! HC39S
#HamRadio #HamChallenge |
| 2025-09-29 09:29:19 | dd1mat@mastodon.social | 17 | Success! | 52 Week Ham Radio Challenge 2025 - Week 39: Make a 2-way contact with an output power of 100 mW or less.With my current setup, I cannot go to mW level. Yet, I hope my 1 W #CW ragchew QSO on 30M with 85 yr old G3RGD counts . Real 5NN both ways#hamchallenge HC39S |
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