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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 fan speed. For the…

Razvan

A600 v2.0 amplifier module – changes and improvements

I have recently made available a new version on the A600 amplifier based on MRF300 LDMOS transistors. Here is the…

Razvan

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 shop area. The…

Razvan

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…

Razvan

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…

Razvan

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…

Razvan