Ubitx.net provides help for constructors: Preventing catastrophes and providing guides, fixes and modifications for your µBITx.
WARNING: Issues have been identified recently with the emissions purity of the µBITx. It is recommended that you study recent posts on this website and avoid operations that could breach emissions requirements.
CAUTION : If you power up the µBITX without the pull-up resistor the µBITX can randomly go into CW transmit. Have you installed the 4.7k pullup to 5v on the CW key pin?
v3 Board? – There are known issues with WX brand TDA2822 chips (U1): Read this. Earlier UCI and socketed TDA2822 are not affected.
v4 Board? – If your audio is distorted see this article. Note that audio output is reduced over the v3 board. If you use a low impedance speaker you may need an additional amplifier module (LM386, TDA2822, etc.) to get adequate volume. The audio pop mod is not required.
SHIPPING: µBitx orders have been shipping within one or two working days of being ordered. You should receive a shipping notification through PayPal once your product has been shipped. Estimated delivery times to different countries:
EU: IndiaPost: 2-5 days DHL: 2-5 days
US: IndiaPost: 10 days DHL: 2-5 days
Asia: IndiaPost: 2-4 days DHL: 2-4 days
AU/NZ: IndiaPost:10 days DHL: 5-7 days
BITX QSO DAY: Every Sunday – 3PM & 7PM Local Time – 7277 kHz in North America, 7177 kHz elsewhere.