Sunday, January 10, 2010

500kHz - easy start

Now that the medium term plans are layed out for the overall 500kHz station, time to have a short time plan for an early kick off.

When browsing the internet, I came across this design:
http://www.alan.melia.btinternet.co.uk/500k_TX.htm
Cool, that's a nice start for an easy concept.

In my BOM (Box Of Materials), 4MHz resonators are present. Using a 74HC4060 ripple counter w/ builtin gate oscillator (Pierce), that should be a really easy start. Either a 4040 ripple counter or three FlipFlops will do the dividing by 8. 4060 was not a good idea, since the smallest division is by 16... Should have checked data books before writing ;-)

Further thinking of a 74HC240 keyed buffer and a IRF510 final.

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