The World of LF


A cheap and cheery MF TX from GW3UEP.

This is a development of Roger's simple 80m CW TX for use on 500kHz.

The schematic

Parts List

The oscillator is based on an 8MHz ceramic resonator which can be "pulled" a few kHz giving a coverage of 501-504kHz after dividing by 16 in IC1.

A test versio built by GW4HXO

Here is GW4HXO's version undergoing tests. Note that the PA coils are all at right-angles to eachother to prevent mutual coupling.


More information and a 100W version on Roger's web-site

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