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Good to hear it works. In CW mode, the final amp is driven hard because the amount of bfo that sneaks through the crystal filter varies depending on how the bfo and filter are aligned and the exact

I have finally (hopefully) got my BitX-40 up and running.? I have two problems that I hope someone can help with.? The first is that when I go press they key to go to TX using semi-QSK mode I get a

Thanks. Found it.

As of now, the latest schematic I'm aware of is posted here: ?/g/BITX20/message/33255 Includes the crystal filter and the additional LPF's for transmit.

sorry, meant to say Farhan, not Darian

Hi Jim, See the first post in this thread by Craig, however Darian said he is working on a more up-to date schematic. 73 Elia, M0ZHN

Gordon, ?Congratulations.? It's good to see this kind of work going on.? I love playing around with microcontrollers and now integrating them with my ham projects is right up my ally.? Keep up the

I have been searching for the updated schematic with xtal filter and band pass filters. Can anyone point me in the right direction? jim wa7hrg

Hi all, Brand new Foundation licensee here in the UK, looking forward to building a radio (BITX40 or UBitX) as part of my license upgrade practical. Having studied a number of topics? and you tube

While someone is designing a? larger thru hole board, if there is room I think a small section of just holes similar to perfboard would be handy to build extra circuits and additional features on. I

A few more ideas, if you happen to be in the market. ? Though this is a good example of why I seldom actually do anything, it's so much fun to dream up possible embellishments before ever getting

Hi Mike: As I've said many times before, I'm a software guy and do not know enough about the ?BITX hardware to know what's what...but I will. I do know a little about the Si5351 as I've played around

I'll be interested in such a board, Rahul! In fact that seems like a kit type that I'd love overall. I am wanting to build a DDS controlled general coverage receiver as a project, and this would be a

The initial Raduino software effort basically works! Using the bitx40 Raduino, I can fully tune (one any one band) the Heathkit SB-100 vacuum tube radio now. In order to change to a different band you

I compressed the picture attached to the first post down to almost nothing to save bandwidth.? I didn't realize how bad it was.? The actual bezel is silky smooth and straight.

In the process of refitting lunchbox (my BITX40 lived in Farhan's plastic lunchbox shipping container so long I've taken to calling it lunchbox) to my fancy new Banggood Excellway enclosure (

Jack, Craig, Don’t overlook the fact that the ?Bitx requires three RF sources, VFO (converts RF input to 45 MHz.), a second LO (converts 45 MHz to 12 MHz.) and a BFO. So a TFT/VFO based on one of

The completed exciter board is stable and runs for hours with minimal drift but the VFO runs wild when its mounted on the base of the steel box that would be its home. Not using an FLL and hoping to

Thanks for the Kudos Gordon. I'm really on standby now with a huge work load, but I'm ready to help Allard in the version 2.0 of the bix40 code for the raduino or even Farhan with the new multiband

The single band units are a joy to build and modify . Even works on 160 ! A big THANK YOU to Ashhar Farhan and the rest of the team for an outstanding job with this latest multiband update. You have