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 Adonis M308 mic to Anytone 5555N

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26uk81
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Call Sign : 26UK81
Posts : 108
Times Thanked : 2
Join date : 2020-06-06
QTH or Location : Oxford
Equipment Used : ss 6900N, AT5555N, President McKinley
Age : 38

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PostSubject: Adonis M308 mic to Anytone 5555N   Adonis M308 mic to Anytone 5555N Icon_minitimeTue Feb 16, 2021 12:24 pm

I've purchased an Adonis M308 mic for my AT5555N.  As I am only planning to use it with this radio, I plan to crimp an RJ45 connector directly onto the end of the lead.   Having watched this video (75) Anytone AT-5555N / CRT Superstar SS-7900 RJ45 ext. Mic+Prog Data Interface - YouTube I think I have an idea what goes where.   But does anyone know what the blue wire is for and if it is important?  Also, does anyone know if the channel select will work?
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26uk81
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Call Sign : 26UK81
Posts : 108
Times Thanked : 2
Join date : 2020-06-06
QTH or Location : Oxford
Equipment Used : ss 6900N, AT5555N, President McKinley
Age : 38

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PostSubject: Re: Adonis M308 mic to Anytone 5555N   Adonis M308 mic to Anytone 5555N Icon_minitimeThu Feb 18, 2021 8:20 pm

Here is how I got this all working:

With the lead I bought with the mike, I was unable to get the wires into an RJ 45 connector as theyt were slightly too thick.  In the end, I repurposed a CAT6A patch lead.   Better to use CAT6 as CAT5 wires are really flimsy and dont take solder very well.  So the plan was to chop one end off and install the 8 pin mic connector on one end.   Assuming the patch lead is wired to T-568B standard (most will be), the pin out is as follows:

Pin 5 (white/blue):  Ground
Pin 6 (green): Mic audio
Pin 7 (white/brown): TX/ch up/ch down
Pin 8 (brown) Channel common

Adonis M308 mic to Anytone 5555N T568b10

On the mic end, I followed the pin out guide in the manual and soldered the four wires with some some additional steps:  

This Adonis mic has a seperate earth for the TX side, which I've never seen before.   I simply jumped it with a short wire to the main earth pin.  TX was now working

Due to a complete lack of documentation from Anytone or CRT I had open up and study the stock mic to work out how to get the channel select to work.  The CRT 7900 manual just lists pin 8 as "blue NC" which is very vague.   The Anytone manual doesn't have any pin out at all!   Anyway after studying the PCB and doing a few tests with a multimeter it became clear that the mic channel selection on this radio works by switching the TX circuit to earth via a resister.   There is an 11 ohm and a 2200 ohm resister one for up and one for down (I can't remember which way round).   I stole the resisters from my stock mic and wired them in on the back of the mic plug.   Both of them need to connect to the TX pin, as well as the TX wire (VERY fiddly) and the other end connects to the respective "up" and "down" terminals.   My mic is now fully functional with working channel select.

A lot easier to order your mic from a supplier who will wire it up for you!   But I hope this is useful to anyone scratching their head over the mic wiring for this radio, particularly the channel select for which there is no documentation to be found anywhere.  Many would probably prefer to buy the adaptor and wire up to a standard mike plug.  I wasn't bothered as I only intend to use this mic with this radio.   If you do use a standard mic plug, the principal for wiring the channel buttons remains the same, albeit with different colour wires depending on the type of lead used.


Last edited by 26uk81 on Thu Feb 18, 2021 9:09 pm; edited 1 time in total

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Victor
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Victor


Call Sign : 26-CT-3228 Ham M7VIC
Posts : 4026
Times Thanked : 253
Join date : 2019-11-10
QTH or Location : Bedford
Equipment Used : Various

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PostSubject: Re: Adonis M308 mic to Anytone 5555N   Adonis M308 mic to Anytone 5555N Icon_minitimeThu Feb 18, 2021 8:47 pm

Nice job Chris. 👍

Brilliant of you to share the details of what you had to do to get your mic wired and working. I'm sure that others wanting to do the same will find your posting invaluable.

'Liked' & 'Thanked'. Well done.


All the best,
Victor
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26uk81
Senior contributor
Senior contributor



Call Sign : 26UK81
Posts : 108
Times Thanked : 2
Join date : 2020-06-06
QTH or Location : Oxford
Equipment Used : ss 6900N, AT5555N, President McKinley
Age : 38

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PostSubject: Re: Adonis M308 mic to Anytone 5555N   Adonis M308 mic to Anytone 5555N Icon_minitimeThu Feb 18, 2021 8:53 pm

Not as detailed and "step by step" as I would have liked but I hope it provides some pointers for others struggling to find concrete information as I did.

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PostSubject: Re: Adonis M308 mic to Anytone 5555N   Adonis M308 mic to Anytone 5555N Icon_minitime

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