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Monday, August 14, 2017

ZL2CTM's Homebrew Transceiver Project

Wow, Charlie has a lot of very cool ideas in this initial video.   Some suggestions: 

-- With the IRF-510 in the final, beef up the heatsink, and follow Farhan's lead by including an option for 24 volts on the drain.  That would take you  up to 20 watts or so (for those who are so inclined). 

-- Could that Teensy SDR board work at the IF frequency?  If so, consider putting it ahead of the crystal filter.  This would enable us all to join the Waterfall Signal Purity Police Force. 

-- I love the OLEDs too, but I found them to be noisy.  I minimized the noise with shielding around the OLED and active decoupling on the power line to the AF amplifiers.

More of Charlie's work here: 


1 comment:

  1. There has got to be some sort of subliminal telepathic propagation going on between ZL2 and W8. Charlie and I have never spoken and, in spite of being at opposite ends of the globe, are at the same stage of planning very similar projects - the topology of our rigs is the same, only our choice of hardware is different. Mind blown!

    73 - Steve N8NM


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