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1. Ed Hare, W1RFI, Long time ARRL Lab Engineer, Passes Away

   Edward F. "Ed" Hare, Jr., W1RFI, a long-time ARRL Lab engineer, passed away on October 10, 2025, at the age of 75. He was a dedicated ham radio operator, RFI expert, and contributor to ARRL advocacy efforts.

   2025-10-15 Tags: amateur radio, ham radio, arrl, w1rfi, ed hare, rfi, bpl, radio, qrp, acy by klotz
2. Quansheng UV-K5 TRX VHF UHF (HF RX) Mod Ready

   This is a pre-order for the Quansheng UV-K5 radio directly from the factory with modifications for H.F bands and updated firmware. The radio also includes an antenna inductor change and audio quality fix.

   2024-04-04 Tags: quansheng, uv-k5, radio, vhf, uhf, hf, rx, jasonkits, qrp, tindie, ham radio, firmware, hacks by klotz
3. QRP Guys End-Fed Half-Wave Antenna

   64:1 balun?

   2022-05-29 Tags: ham radio, antenna, qrp, qrpguys, ecommerce, end-fed, half-wave, dipole by klotz
4. Turbo Codes Supercharge Internet of Things - IEEE Spectrum

   2018-07-29 Tags: qrp, vhf, uhf, turbo codes, coding gain, iot, ham radio by klotz
5. 2-tube qrp transmitter

   2017-12-19 Tags: qrp, tubes, ham radio by klotz
6. marxy's musing on technology: Feld Hellschreiber QRP beacon with arduino

   2013-08-19 Tags: arduino, hamradio, hellschreiber, qrp by klotz
7. BJT Transistor Parameters (2n3904 2n4401 2n2222)

   2012-08-20 Tags: bjt, data sheets, hamradio, qrp, transistor by klotz
8. WA7BNM Contest Calendar: QRP Contest Calendar

   2011-12-06 Tags: contests, hamradio, qrp by klotz
9. Single tube CW/AM Transmitter

   2011-03-13 Tags: 6bq5, el84, hamradio, homebrew, qrp, tubes by klotz
10. QRP CW/SSB Transceiver/QRP Radio Kits

    2011-01-24 Tags: cw, hamradio, kits, qrp by klotz

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