I just pushed version R1.4.0 of my software fork for the stock uBiTXv6 Arduino Nano. It includes a LOT of back-end changes, but only a couple user-facing updates: There's now a designated spot in the

Hello everybody. I have a version 3 of the uBitx. Is the negative feedback in the finals necessary or at least useful for the stability of the push-pull amplifier? I have seen the 26db 10w amplifier b

Hello, i'm using a ver. 4 Ubitx with 2.8 " Nextion display, using in CW there is a strange problem, something the radio it's "freezing" during trasmission and i can't send no more CW and also i can li

http://qrparci.org/?utm_source=sendinblue&utm_campaign=News_04012021&utm_medium=email note this talk "Ashhar Farhan VU2ESE - sBITX - An Open Source SDR that YOU can hack!" -- 73 Bob KD8CGH

All, I know this isn't the right forum for this - anybody know of a forum for people building linear amps? Last night, I had my first contact in some years. A pleasant gentleman in Calgary. Unfortunat

I was never overly confident of the two small heat sinks supplied for the IRF 510's. I had made a modification to get rid of the heat on the 5 volt regulator and also steady the vertical board which i

Evan, I've changed the thread name to something I think more appropriate. Should be sufficient to simply state that this is a continuation of the conversation here: https://groups.io/g/BITX20/topic/75

Ages back Ashan or Ashar published a whimisical schematic where he used on of the Si labs offerings to potentially become an FM VHF as in NBFM generator. Does anyone recall how this was done and how f

farhan@...> wrote: > >> My embarrassment would be the relay-based computer science fair >> project that I tried to design in 6th grade. It did work to some >> extent until the actual fair. By then the

After getting my feet wet with the UBITX I ran across this interesting sounding project: https://antrak.org.tr/blog/usdx-a-compact-sota-ssb-sdr-transceiver-with-arduino I sent off the Gerber files and

Hello everybody, Does anyone know if, I think their name is, Inkits is open, ( their URL is amateurradiokits.in ). I ordered a uBitx 5” Nextion universal case, with all the goodies included, from them

hello, My bitx40 not transmit when use mic but when use CW transmit normally and my output power is 5watt on dummy load. please any idea about my problem. 73 de Yiannis, SV5FRI

Hello all! QRZ, is the frequency in use? Last night, on a whim, I ordered a uBITX v6 from India. Anybody know how fast they ship? Kicking myself this morning because it's also carried by gigaparts, wh

How does it work with KD8CEC firmware? Are the formerly known problems solved like : - CW, the beginning of the first character being eaten ; - harmonics level, are they below 43dB ; - integration wit

Gerard, On your "tandem match" your single turn (through wires) are the larger wire. I put the large magnet wire through a piece of insulation from a 14 ga wire to make this. On the smaller wire if yo

Could a member explain these odd things I find on the schematics wiring of four transformers : - T5 : wires 1 and 6 end in a x ; - T6 : the same ; - T8 : the same ; - T11: the same with wires 3 and 4.

An interesting new contribution by "NerdRalph" - this may help the uBitx Raduino code size - ArduinoShrink replaces Arduino AVR Core functions with smaller and faster versions. The Arduino Blink examp

Even though the sources for the Silicon Labs Si5351a chips have pretty much dried up and the remaining stock at some suppliers is being sold at highly inflated prices, we found, thanks to a post by on

Here is a general question: If Q90 is bad, will there still be a CW transmit signal? In other words, will Q90's health affect both the SSB transmit signal AND the CW signal...? The reason for the ques

I finally got back into the shack after almost a month. And I am glad to say, the uBitx lives! I want to thank everyone for the excellent advice! I started by removing C1 and replacing it with a small