technology, amateur radio, scouting and me

Monthly Archives: July 2014

It’s done, the K2 is complete

At least as far as the basic unit anyway.

K2

After getting over the VCO problem, I’ve been able to make steady, if slow, progress towards completion. The filters are only roughly peaked because I don’t have an RF signal generator. I will rectify that later as my next project is to build an RF signal generator controlled by an Arduino.

I still have a number of option modules to build and install: KSB2, KAT, KNB2, KIO2, KBT2 and KDSP2. None are too difficult and I can pick those off at my leisure.

 

Making progress again

OK, we got past the problem with the VCO. After tracing through the signals, I checked the levels on DIN and CLK against the indicative levels in the manual. They were the wrong way up! At this point I got on to the Elecraft mailing list and started asking questions. Luckily, Don Wilhelm W3FPR wasContinue Reading

Debugging the VCO part 2

After spending a bit more time this evening, it appears that the MCU is working OK. I can see logic level changes all the way through the chain from the MCU, via the PLL to the Low Pass Filter. That’s as far I got this evening. More to follow.