Have you loaded the libraries? The full error message would be useful. Here is a short write up on the process. This refers to Allards, PE1NWL's code for the Bitx40, but the process is similar. http:/

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I tried the 90.1 uF cap in series with the AF filter output but it didn't help. My filter is always on, but there is no noise from it when it is bypassed, so I don't think it is generating noise on th

Michael Thanks for the suggestions. I'll try the .1 uF cap first. The power is always on to my filter. The first time I wired it, I tied the AF filter output to the line to the audio connector. Big mi

Has anyone successfully implemented a Sotabeams CW filter in their uBitx? I added wires: volume wiper to the pole 1 rotary switch center. pole 1 rotary position 1 to pole 2 position 1 (completes origi

Cool I planned to assemble one on a piece of perf board, but this would be cleaner. Bob KD8CGH

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I suspect a problem in the wires going to the volume control. If you look at the schematic those wires carry a weak AF signal that then goes to the final AF amplifier. Any electronic noise picked up f

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Am I correct that the suggestion is to take a leaded 470 uf electrolytic capacitor and attach it over surface mount C50 with the + side facing the trace to R50?

More info on the mod. I added wires: from the volume wiper to the rotary center. from rotary position 1 to Audio connector (original wiper destination) rotary 2 & 3 to AF filter in AF filter out to ti

I'm well familiar with the Heathkit Twoer "Benton Harbor Lunchbox". I built one a in Junior High school shop many decades ago. It disappeared from my life over the years. This Sixer was not only dead

Here is my uBitx after first mods. I added a Sotabeams CW audio fiilter. The old TR switch now controls the filter. Down is the original wide SSB, middle is the normal CW and top is narrow CW. The rig

Like others, I had problems with uBitx keying, which is why I was happy to see confirmation of Jim's hardware solution. I'm adding a daughter board with a SOTABEAMS CW audio filter, 2N7000 based anti-

If you abandon paddles, wouldn't it be easier to change Farhan's code to only detect 2 levels or configure A6 to be a digital I/O? As a bonus you could add CW Key mode and use A6 as a digital input an

The present keying system doesn't work reliably. I have had problems with it and others have also reported problems. A fix has been suggested that uses the same analog multi level scheme, but I think

Narrower audio filters for CW Clean keying for CW Pop elimination QSK Digital mode audio interface + PTT AGC SWR gauge Auto Tuner CAT control

The QRPGuys Multi Z and EFHW tuners claim to use an absorption bridge that limits the SWR to the finals to 2 to 1 during tuning. http://qrpguys.com/multi-tuner

I used a generic set of male-female jumpers like this on my uBitx and it seems to work well. I taped the sides of the connectors together on both ends to keep everything aligned.

Alex You are correct. I'm using one of those inexpensive voltage/current/power/energy LCD displays that has simply +/- in and +/- out. I'm concluding from it's behavior that it's measuring current on

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I still have my K&R "borrowed" from my company's tech library decades ago. Return was made moot by the library closing. However, I did return the Knuth. I also have several of Jack's books I bought. I

I traced it down to a DC ground loop. When the uBitx is grounded, the power supply line current reading dropped. If I put an ammeter in the ground line I got a current reading equal to the power line

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Thanks for the response Lawrence Even the receive only power draw is different.

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