I was having some issues with RF getting on my mic cable and making the radio change frequency using the little Baofeng mic. I put a .01u cap on the mic audio to ground in the radio. Still had

Evan, You have to believe in fact that my screen Nextion work well there is a defect seen before look here With seach fonction, i find that:for the pb of brightness of the Nextion. see here:

Aaron, Yes, it looks like Q90 is not working properly. As Gordon said, most likely it was killed by a nearby transmitter. I would put 2 back to back diodes between the K1 relay contacts 12 and 16

does this mean that I need to replace Q90? -- '72 Aaron Scott The K5ATG Blog Mid-Del Amateur Radio Club QRPARCI# 16443 GQRP# 16389 4SQRP # 1080

Evan is helping you out a lot here. Your measurement showed that transistor is not turned on. And possibly worse. I haven’t looked at the schematic but he’s leading you down a good path Long long

I made the measurements. I hooked the uBITX V6 to a 50 ohm dummyload. I then plugged in the power cord and turned the transceiver on. I then plugged in the microphone and set the radio to USB on 20

Hello, Some pb's with my home made PCB µBitx. LOL 1) When I test the frequency encoder potientiometer, I have the impression that it does not follow correctly. If I am on the step of 50htz for

Adrian, I would recommend sending a private message to Rahul. I would also recommend that you direct your post to an individual, or at least be more specific as to what you are asking. Gordon's reply

Nikhil B, Did you try CW? That would isolate it to the power amp if no power in that mode. Here is a PDF with static dc voltages for the uBITX. NOTE: You do need to press the PTT to go into TX mode

I don't think the company prefers to give away its intellectual property however several folks (including me) have created pcb's that control the si5351 chip and include the raduino and could do that

new to this group where can i find the gerbers for this board.

Could you post a connection diagram please Chris. -- PE3ES - F4VTQ - Erwin 73

Does the RX work ? If that is Ok then start with D1/2/5 Q20/21/22 and Q40/41/42. Check transistor voltages and diodes for dry solder. It could also be the interstage toroids if RX is poor. Raj

BTW when i say no power i mean zero power (no means to measure miliwatts). With my limited knowledge i think, SSB signal is generated, converted to RF signal but that RF signal is not getting

Thanks Evan for prompt reply, but i dont think mic drive is an issue here because with the same setup earlier it was pushing 5 to 7 watts on ssb. Then it was sitting idle for 5-6 months away from any

Measure DC voltage from each of the three leads of the SMD transistor (collector, base, emitter) to Ground or common on the uBITX. Here is the pinout of the transistor. The wiring is per the

There has been at least two issues with the Baofeng mics: 1) Weaker than nominal modulation 2) A high failure rate See other posts on this . -- jeff.debes@...

Hi Rob, I am not clear on what is going on here, is this the mike that comes with the uBitxV6? or some other Baofeng mic that you picked up to use? And you are just removing whatever surface mount

Evan you asked; Did you get a chance to measure the 3 leads of Q90? What measurements do you want me to make to Q90 -- '72 Aaron Scott The K5ATG Blog Mid-Del Amateur Radio Club QRPARCI# 16443 GQRP#

Hi Evan, Ok on the mic capacitor and possible RF into the mic. As I mentioned my Baofeng mic did not have that capacitor installed! My Rf testing with an antenna and Dummy load did not have any RF