uBitx – W9TH.com

February 1, 2019 Jeff

uBitx – Part 4

Here is my completed uBitx. It worked perfectly the first time I applied power. Well, except I had the encoder wires backwards so the tuning was backwards, but I don’t count that. The microphone, keyer and external speaker jacks are on the front panel. I plan to make custom knobs (red of course) on the lathe when I get time. There is a custom made heat sink on the back. It connects to a custom made piece of thick aluminum on the inside of the case where the final transistors mount. This view show power and RF connections. You can

August 7, 2018 Jeff

uBitx – Part 3

This is my uBitx ready for wiring. Due to the nature of how the case halves fit together, I decided to keep all components on the top half for easy wiring. This presented some challenges for placement of the headphone, keyer paddle and microphone jacks, but I think it will work. The speaker is from an old TV set. Although not yet added, I plan to have my call sign on the speaker grill in white paint. The last picture is the machining of the custom interior heat sink. I had to make it a specific thickness to match the

August 7, 2018 Jeff

uBitx – Part 2

Here is my uBitx case after paint. Notice the heat sink area on the inside and outside of the case. I purposely left the paint off this area so I could use heat sink compound on both sides. I plan to put internal and external heat sinks on the final transistors.

August 7, 2018 Jeff

uBitx – Part 1

Here is the enclosure I have selected for my uBitx. I have had this box for over 20 years, just waiting for the right project. I cleaned it up, drilled and cut all the proper holes, and it is ready for paint.