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Looks like the dummy load is not good or you have a lossy connector etc. Change the interconnecting coax cable and see. A photo of the dummy and interconnect will help us! Raj

Streams intersecting - I Like it! This 'Pi thing' was little more than an idea of mine, though others had been thinking likewise and have taken it further and faster than I'd envisaged. It's a joy to

Hi all! I'am working (poorly less time atm) on this project, too: - Zero W (~13 EU with shipping) - 3.5" Touch LCD 480x320 (~11EU... SPI, not HDMI) - digital rotary encoder for tuning (much cheaper

Hey all, Well me and a fellow HAM from my club have made some more progress into building the W8TEE antenna analyzer. Finally the right diodes came in and the build is finished. However on connecting

Hi, i used to have the same issue of frequency drift. but after using DDS that problem is solved. -- Thanks Ashok. ------------------------------------------------------- | See My Small Object

Have a look at the attached cct. I didn't design it, just built it, and it works great. Cheers John de VK4JWT

You can also get a QRP Labs Si5351 board that fits Jacks board instead of AD9850. It gives you all tree outputs if you want or just one. Cheers, Will

I'd guess?Don is running with a faster i2c clock. The Etherkit library supports lots of features we don't happen to need on the Bitx40.

Paul, It normally takes 5-10 seconds on my PC. When the upload fails the editor tries for a really long time before timeout. Check if you have the right board and port in the TOOLS menu. The correct

Thanks for all the great suggestions. Looks like I have the Etherkit library version 2.01 so I updated to 2.10. This makes a noticeable improvement to around 2.5ms but I can't duplicate Don's results

The leaded cap goes across two pins of the tuning pot as explained in the wire-up instructions at hfsigs.com Otherwise the operating frequency will jump around. I don't think anybody at hfsigs has

Thank you everybody for your help. Just ordered the proper pot from Adafruit - no RadioShacks left near me. 73 Ben KD2NOU wrote:

Ben, A is audio taper - log pot. B is linear. B will work but you may not like the way the volume changes when you rotate it! Raj

I received and unpacked my bitx40 this evening, and included was a surface-mount capacitor inside a hand-cut segment of tape, which seems to match the packing list for "16. 1 x 0.1uf smd capacitor".

I have done some more tests with a spectrum analyser, and measured the following levels with a 470pf cap across L7 in the LPF, and a 470pf cap from the left side of L1 to the right side of L3 in the

If i remember correctly, the “A” and the “B” prefix designates if it is a linear taper or a logarithmic taper. You should be able to google which is which. Dr. William J. Schmidt - K9HZ J68HZ

Hello Everybody, just wondering is the 10K pot that has the switch on it a regular, 10K pot or is it special because it says "A10K" on it and all the pots I have in the parts bin say "B10K" would that

BITX QSO Night, Sunday, November 12, 7pm Local Time, 7277 kHz in North America, 7177 kHz elsewhere Join us as we make contacts from BITX40 to BITX40 on 7.277 MHz in 40 meters! This is a worldwide

I'm still new to all of this and don't know the history, but it seems like a separation of "core" and "bells-and-whistles" would be nice. Perhaps some kind of modular design that makes it easy for

There already is a 2nd platform: Jack’s Arduino Mega 2560 Mini based board. It does use an AD9850 instead of the Si5351, so using it as BFO would not be an option. But maybe the two platforms can