The inductor is 19 turns on a T50-2 toroid, tapped at four turns up from ground. Supply voltage is 12V. The variable capacitor is one half of a dual-gang capacitor from www.6v6.co.uk.
14 April 2006
Ugly VFO circuit diagram
Here it is, a combination of the "Practical 7MHz Hartley Oscillator" from Experimental Methods in RF Design (page 4.3) and a buffer amplifier from the website of Alan Yates VK2ZAY. Click on the diagram to enlarge it.
The inductor is 19 turns on a T50-2 toroid, tapped at four turns up from ground. Supply voltage is 12V. The variable capacitor is one half of a dual-gang capacitor from www.6v6.co.uk.
The inductor is 19 turns on a T50-2 toroid, tapped at four turns up from ground. Supply voltage is 12V. The variable capacitor is one half of a dual-gang capacitor from www.6v6.co.uk.
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Did some testing with the IMD Meter in my garden near my HF antenna. Field strength was either zero or full scale. IMD was either 'no ...
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Here it is, a combination of the "Practical 7MHz Hartley Oscillator" from Experimental Methods in RF Design (page 4.3) and a buffe...
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