Free technical library. Articles from the magazine HF and VHF, 2008

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Magazine HF and VHF

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Alphabetical list articles with annotations, from journals published in 2008 in the journal KV and VHF:

4-band HF antenna

4-band direct conversion receiver

COM ports

CW transceiver on 80m

LC oscillators

Notch filter

QRP BPSK 80m band transceiver

DIY SDR transceiver: frequency synthesizer

Antenna DX 2000

Windom and OCF Antennas

Antennas for long-distance radio communications

Transformerless VHF amplifier at 144 MHz

Transformerless Power Amplifier for QRP Transceiver

Power amplifier power supply

Band pass filter block for transceiver main board

Dealing with interference

Again about ICOM IC-7800, or a review sample for dummies

RF milliwattmeter

High voltage power supply

High performance passive-active preselector RPU

Hybrid output stage

Hybrid power amplifier output stage

Bidirectional amplifiers

AGC detector

And two and three

Interface for PSK-31 operation

Dummy load

Linear power amplifier on GU-50 lamps

G5RV Multiband Antenna

Multiband Mini-Test Receiver

Modernization of the R-143 radio station

Directional antenna of vertical polarization

Powering the transceiver from the computer unit

P-loop in filtering mode

P-loop: responses to comments

Practical constructions of the direct conversion technique

[1] [2]

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