Max, please check whether the mic body is connected to chasis ground. i mean the positive bias voltage for mic should come on independent pin and NOT to the body pin of the eletret element. In case

You're welcome. Please let me know the result. 73 Allard PE1NWL

Three pieces of wood, and cheap momentary contact push button.

Max, From board to board there will always be some variation ofgain. You can increasing the mic gain by reducing the resistor BITX40 - R123 uBITX - R63 You could try the mic gain control I described

lovely design Regards MVS Sarma

Hi Tim I appreciate the links that you have directed at me. Dave k0mbt

My basic mic

How to store bfo and vfo frequency on ver 2.. help plse......

We need more information, what radio and what firmware are you using? Also you needed to start a new subject line for your question and not use an unrelated topic line it keeps down the confusion.

I've got one, but I wasn't prepared to give up on it, just yet. I really wanted it working. Maybe I can pay you to fix it? LOL!

KC1FSZ's Above Board, Al Fresco, Free Range, QRO, 4-Foot-Long, Wood-Based BITX KC1FSZ's Above Board, Al Fresco, Free Range, QRO, 4-Foot-Long, Wood-Base... Radio electronics blog. Homebrew ham radio.

I tried to image the wirinfg as indicated by Asher Farhan using eagle foot print. here is a ping the jack is mounted pins facing upwards then the image should likely help you regards sarma

Hi Ian I'm compiling, uploading and running v1.070 and I still have one issue. I suspect I must have a calibration problem, because in order to achieve a 600Hz CW TX off-set (to match my external

Hi sarma. I’m sure I have the polarity correct. Someone on this list posted a drawing showing how to identify the negative terminal and I wired according to it. I think the electret mic

Hi Raj. I have the ubitx. Thanks for the suggestions. I see two trimming pots on the board but I haven’t touched them because I have no idea what they do. It appears from your message that

Max your uBITX has three trim pots on it. Two are blue square unit labeled RV2 and RV3 these are together on the board and adjust the bias to the finals. The third one is RV1 which adjusts the drive

The ubitx.net site says the wiring diagram for the volume control is incorrect. Its it now correct. http://ubitx.net/wiring-up-the-volume-control/ ^^ that page should be pulled or updated to reflect

Do you have any prototype adapter boards available? I would like to purchase one if available. I plan on using the Teensy 3.6 and switching to a 128x64 I2C/SPI Oled display.

As a follow up to my post about this heat sink, I did some testing of digital Tx'ing into a dummy load yesterday as I think I have my digital interface set up the way I want. I did not use anything

We've had a wiki up for a year or more: https://groups.io/g/BITX20/wiki/home And it is a good idea. The ubitx.net site offers the alternative of a curated site. Jerry 1000 people editi