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20.07.202522.07.2025 enthru hamradio amplifiers, measurements, sdr, wolf, wolf3

Wolf RU4PN QRP Unit some tests

Just transmit on 20m band before little tuning (after tuning of the bias I’ve got around -54dbm of 2d harmonic). 60db att:

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25.05.202525.05.2025 enthru hamradio amplifiers, antminer, hf, qmtech, sdr

SDRs work

Antminer version almost ready. Need to cut circle for amplifier fan, do some cosmetics, screw on MOSFET board for LPF, screw on

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15.12.2024 enthru hamradio amplifiers, hf, measurements, mrfx1k80

1.5KW HF load SWR

12.12.2024 enthru hamradio amplifiers, hf, mrfx1k80

Testing MRFE6VP61K25H

Photos and video (RU)

07.12.202409.03.2025 enthru hamradio amplifiers, hf, measurements, mrfx1k80

Big HF load

It’s based on a copper plate, big old whipped aluminium radiator and two 100Ohm resistors, 800watt each.

12.11.2024 enthru hamradio amplifiers, hf

Some interesting packages

Longer telescopic part for vertical antenna — better SWR on 40m and 20m without a coil: Copper plate for 1.5kW load: Resistors

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12.09.2024 enthru hamradio amplifiers, hf, measurements, sdr

Dn-radio kit rd16 amp. IMD3

Not the best, around 20dbc — 26db PEP average, needs some work 🙂

12.09.2024 enthru hamradio amplifiers, hf, measurements, sdr, wolf, wolf3

Wolf 3.5″ IMD 3

10watt power 28dbc — 34db PEP: 10watt power 30dbc — 36db PEP: 5watt power 15dbc — 21db PEP:

11.09.202412.09.2024 enthru hamradio amplifiers, hf, measurements, wolf

Wolf2 amplifier IMD3

102W 26dbc = 32 db PEP (taking average — did multiple measures and they were around this value): 1A current on the

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10.09.202420.09.2024 enthru hamradio amplifiers, hf, measurements, sdr, wolf, wolf7

Wolf 7 amplifier IMD 3

DAC driver output — intermodulations somewhere at the noise floor 🙂 : 50W 37dbc = 43db PEP: 80W 31dbc = 37db PEP:

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