I tried the filter outboard on the bench and it was fine. Recently I was poking around with the power on and I discovered that touching ground to the filter affected the noise. Although the ground was

Great work! In the doc you mention the need to be careful in selection of the I2C display controller and talk about a board from Amazon by seller "IC Module". Would provide a link? My search for IC co

#ubitx

See this topic for some solutions https://groups.io/g/BITX20/message/38673

I have a particularly torturous route with no problems. See my reply in https://groups.io/g/BITX20/message/40383

The connection to my LCD is a real hack job: two 90 degree headers and a cable with a 180 degree twist and it works fine. Bob KD8CGH

I decided to add a polyswitch to my uBitx. Since it can draw almost 2 amps I selected a 3 amp, 16 V model. When I got them I tested one and found that I could not trip it with my 5 amp lab bench suppl

I was looking at the data sheet from Mitsubishi for their RD15HVF1 and in the electrical characteristic table on page two it says: Parameter Conditions Limits Load VSWR tolerance Load VSWR=20, ... no

I learned from an accidental grounding on my Bitx40 that pcb traces make hard to replace fuses. Bob KD8CGH

Thanks all. I'm not looking to stun pigeons, but it would be nice to have 5 watts on 30, 20 and higher if the solar activity ever picks up. There is also a RD16HVF1 discussion in the "irf520 vs irf510

I took some time to measure the actual performance of my uBitx with its original calibration against a dummy load. The instruments used are not lab calibrated. I did check my wattmeter against my rece

Peter I have a Siglent SDS 1202X-E that I got on big sale last year at Dayton/Xenia. I like it a lot. I've used the FFT function as a spectrum analyzer as often as looking a signal vs time traces. Wit

I just added a software page to the uBitx wiki with links to original, KD8CEC and W0EB software threads.

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Here's a start. It was written for the Bitx40 but it is the same except for the source code. https://groups.io/g/BITX20/wiki/Raduino-Topics There is a mini USB connector on the Raduino board Farhan li

#ubitx

Couldn't we have both without any board mods or LCD changes by using digital lines 5 & 6 for key/paddle, line 2 for PTT & encoder switch with the resistor trick and still have line 1 (A7) for an S met

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It might be time to look at sensing PTT and the encoder switch by an analog input to free up lines. Neither of these inputs requires the fast response of CW keying so you could carefully debounce the

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Ian First thanks for the great work. Everything in the CAT and memory area worked well. I also could not use CW as it was originally programed and slightly modified your code by removing the intermedi

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Very nice! Compiled and uploaded with no problems. A straight key works well. I had already simply modded KD8CEC's code by removing the intermediate paddle value lines in getPaddle to get clean straig

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Simon Thanks for the info. When I was checking the current draw I noticed a significant difference between the uBitx connected to a dummy load and my antenna. I traced it down to the fact that the dum

Simon Thanks for sharing a good way to implement an anti pop. What is the purpose of the 100 nF cap from wiper to ground? Bob KD8CGH

I moved the filter to the high side and it still generates the same noise. I removed the filter. I might test it outboard some day. Thanks for the suggestions Bob KD8CGH