I've been getting tired of being in the dark about the frequency on which my BITX17 was operating. So I pulled out some graph paper, my frequency counter, and a pencil. You will see two frequencies at each point -- that's because I use two crystals, switched by the black knob on the left. I realize this paper and pencil approach is hopelessly out of date, but I see it as "appropriate technology" for a discrete component all-analog transceiver.
Pete set me straight on how to come up with the numbers: VXO frequency minus ACTUAL carrier oscillator/BFO freq. After doing this I took great delight in going on the air and asking guys with fancy "glowing numerals" rigs to compare their freq readout with my pencil and graph paper readouts: they were painfully close.
But I am not slipping completely into stubborn Luddite-ism; this weekend I worked on a DDS-based AD9850/Arduino VFO with I-Q output based on Paul M0XPD's Kanga-UK Arduino Shield. STAY TUNED!
Our book: "SolderSmoke -- Global Adventures in Wireless Electronics" http://soldersmoke.com/book.htm Our coffee mugs, T-Shirts, bumper stickers: http://www.cafepress.com/SolderSmoke Our Book Store: http://astore.amazon.com/contracross-20
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