NVIS equipment

[Lightspeed]

Good Easy to read reference book for Low Power HF communications

QRP Basics by Rev Gerorge Dobbs

ISBN 1-872309-91-7

This small book covers a lot of ground including radio station set up, radio and radio kit reviews and instruction on home building and fixing of kit

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Antenna Tuners

In Fact Antenna Matching Units. These devices do not tune the antenna at all, but they match them to the input and output circuits of your radio, making for better reception and protecting the output transistors of your radio from becoming damaged / destroyed as a result of transmitting into an inappropriate circuit load.

Properly tuned dipole antennas do not neeed and AMU.

Three off he shelf models to consider are:

MFJ 971 which includes and SWR meter. Will match end fed wires, whips, Dipoles, in facts pretty much anything.

MFJ 901b As above but without SWR meter. Completely bomb proof, and will match just about anything. I once had an interesting conversation with a station in france with one of these units matching a Barbed wire fence as an antenna.

MFJ 16010 End fed wire tuner: Small, simple and efficient.

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SWR meters designed for CB equipment will not give accurate readings at 3.5Mhz and 7 Mhz.

A meter that has proven to be reliable and accurate enough for normal requirements is the Avair AV-20 Cost between £20 second hand and £40 new