What’s wrong with ham radio
This is an amazing hobby and has many sides to it, but as anything it’s far from perfect. A...
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B1500 – Backpanel Unit for RF power Amplifiers
The B1500 RF amplifier Backpanel Unit is designed to sit between a LDMOS RF amplifier and the rest...
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Icom IC-705 coming in April 2020, price announced
The new Icom IC-705 should be available starting April 2020, with a MSRP of 124,800 yen + tax. As...
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F600 – a 600W low-pass filter board for 1.8-72MHz
This design offers a practical solution for HF/low-VHF amplifier output filters, handles 600W and...
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Choosing a heatsink for the A600 LDMOS linear amplifier
For optimal performance, the heatsink should have a thermal resistance of 0.1C/W or better at full...
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A600 v2.0 amplifier module – changes and improvements
I have recently made available a new version on the A600 amplifier based on MRF300 LDMOS...
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A 600W broadband HF amplifier using affordable LDMOS devices
Update: this project is evolving. See this page for the latest version. Kits are available in the...
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Icom IC-705 – considerations on RX power draw (wild guesses ahead)
I’ll try to put together a breakdown of IC-7300’s sections and how much power those use and try to see how Icom could’ve tweaked those to make the architecture “portable” for the IC-705.
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Icom IC-705 HF/VHF/UHF portable SDR transceiver – full details
IC-705 has just been unveiled by Icom at the Tokyo Ham Fair. This is a portable HF/VHF/UHF transceiver featuring SDR technology, internal battery, GPS, Bluetooth and D-STAR. Output power is 10W on external 13.8V supply or 5W on internal battery.
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Yaesu FT3D – new flagship VHF/UHF handheld
Yaesu FT3D is the next flagship VHF/UHF handheld; features a full color touchscreen display, Bluetooth and many other goodies already present on the FT2D.
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US regulator FCC to introduce digital modes practical test for amateur examinations
This article was an April Fool’s prank. In a proposal that aims to make new changes to the...
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Red Pitaya STEMlab 122.88-16 for SDR transceivers
Red Pitaya have just introduced the STEMlab 122.88-16, an updated version of the STEMlab hardware aimed specifically at being used as a DDC/DUC HF/50MHz SDR transceiver.
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