开云体育

Just one note about using a CB microphone. They are
usually dynamic which means they are like a speaker and
would look like a short to the mic input. If you want to use
one of these experimentally, put an isolating capacitor in the
mic input line so it will not short out the line. Also, if you have
a choice, use a high impedance mic ir maybe a small
transformer to make a low impedance mic look like a high
impedance mic. All this is experimental... But the little eletret
element supplied with the radio can be substituted for the mic
element in the CB mic just as easily. Put it in a cut-out piece
of styrofoam made to fit the old mic's shell and connect the
eletred to the designated wires that connect tot the radio.

For a cable, I bought a stereo-to-stereo cable at Dollar Tree
and cut off one end and used this for the mic cable. A proper
cable was not available here so I used what was for me the
most convenient.

Plug-N-chug is the name of the game, sometimes. It's like the
old Murphy's Law: We may not have time to do it right but we
can always find time to do it over.

Bob — KK5R

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On Thu, 12/20/18, Mark Vincett <kd2qar@...> wrote:

?Subject: Re: [BITX20] UbitX build questions
?To: [email protected]
?Date: Thursday, December 20, 2018, 3:18 PM

?I had/have
?the same question and stared at images and combed the web
?quite a bit trying to figure out what to do.My
?conclusion (thus far) is that there are too may mic
?configurations out there, so it appears to have been left
?intentionally vague.I think I identified at least
?8 different variations of 4 pin mic wiring by different
?manufacturers.I am still, slowly, assembling my
?uBitx and haven't started assembling the mic yet but, I
?think you will need to study the mic and the photos to
?determine which wires in the mic match the function of the
?wires in the uBitx.In my case I found an old CB
?radio mic in a junk box in the barn that I plan to attempt
?to wire to the connector provided in the kit if I can map
?the wires into the mic to the three connections in the
?uBitx.
?This
?doesn't necessarily answer the question you have but it
?might save you some time searching for an answer that may
?not exist in this case.
?-Mark
?On Thu, Dec 20, 2018 at 2:27 PM dey <deyoung1@...>
?wrote:










?First
?of all, let me apologize for asking what will
?be (hopefully) simple questions.? This is the
?second kit radio that I have assembled and the first one
?with voice capabilities.? My other radios are all
?CW.? Which is fine for me.

?I just
?received the UbitX (v4) and the assembly kit (case and other
?parts).? This version includes a mini PCB that hold
?the three (03) jacks for the front panel as well as the mic
?and speaker connection.? I have managed to get
?everything assembled except wiring the round, 4 pin mic
?jack.

?I
?cannot tell which color wire goes to which
?pin.?
?Any suggestions?

?One of
?the reasons I purchased this radio was the ability to
?“hack” the code.? But I don’t see any
?USB (or other) port to use accessing
?the Arduino.? Any
?suggestions?

?I have
?a 47 year background in software development so playing in
?the Arduino will be fun.

?Any
?help is appreciated.

?Derrick/w4dey








?--
?----------------------------------------------
?? ?? ^
??? /?? \? ?? Mark
?Vincett
??
?/___\? ?KD2QAR
??/? ? |?? \??
?? ? ? |? ? ? ?
?ME --> GA '92?
?----------------------------------------------