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I'm puzzled by - the TRS plug --. What sort of special connector is this ???

Hi, A quick check on the web show the Baofeng UV-5R HT reportedly puts out ~3V bias for the mic.? An easy check of the mic then would be to run it off a couple of 1.5V alkaline batteries and see how

Jonathan Nice work on your build. Try injecting a small signal into various stages, such as before and after the lower frequency crystal filter. Then work your way forward. Possibly a open connection

Hi, I have no idea what the operating voltage of the mic should be -- it's not my design and I'm not selling them.? I was only stating some ideas I had on what could be going wrong.? In the past

Hi, Your write up is pretty cool. The fact that you get noise when you connect an antenna is Hugh. Means most things work. Other than encouraging you to start at the antenna and work your way back,

My one SSB contact with my new V6 ubitx complained my audio sounded muffled. There have been so many complaints about this mic. Are there any definitive solutions yet. Bad batch of mics? QC

Dave Esquer, The stock firmware for the v6 ubitx (and all prior stock firmware) have this issue.? It is how the program was written. There is a fix on Farharn's github as well as

Don't get too locked into asumptions of what the maximum electret capsule voltage might be. _-_

If I add the resistor will that not decrease the audio level as well. How about bypassing the resistor with a cap to eliminate that signal loss through the resistor. The original capsule is shot, it

Mark, If 12 volts is too high, what is the design voltage for this radio? How low can it go? The schematic shows 12 volts. I am going to use a buck converter to lower my 14.4 (15? when in

These are dynamic microphone, how did you keep the? DC bias voltage from hurting the mic. I have a? lot of there laying around.

I did a search on condenser mics and all I could find was a maximum of 10 volts, 2-10.? As my UBitXv6 is going to be my go-to radio when we loose power I am going to have to make some changes. I am

try an extra 4.7k in series with the existing one. That should bring the bias to within Baofeng spec. If really blown 10k resistor needed instead of 4k7. There were no problems with original capsules,

Jonathan KM4CFT Mixed thoughts about this. Your asking for support of something that is not a real uBITX so we have no idea how close it is to the original design. But...it is fashioned after the

Folks, I just received my uBITX v6, great tinkerer's project.? I did your excellent alignment procedure, thank you for the clear directions. But, after the cal, and using the reverse beacon

I find that the power to my microphone is on my solar-powered equipment of 14.4 volts and the cartridge is rated at 3.0 volts. I am not sure what the margin is but it is probably less than my line

I have checked the wiring and it is ok. If not it would not have worked at all. It is just that the microphone element seems to have a? low output.

Thank you Evan! Actually according to your email, the v5 and v6 have the same crystals and frequency, so the BFO alignment should be identical! I also have "Spectroid" as well as another audio

Hi Felipe, It would take some investigation to know what the proper bias voltage is.? Perhaps HFSignals could help the group with this? Electret elements do have a maximum operation voltage

Hi all, I recently soldered up what was basically a copy of the uBitx V6. I used the schematics and pictures of the board to essentially create a copy of the uBitx v6 in KiCad. I found a few problems