Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post Reply
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

Hi Group,

I bought two of these: https://www.aliexpress.com/item/1005001859369437.html, one for my UV5-R and one for use with the (tr)uSDX, under $4 (at the time) with free shipping.

Seems to work fine (as well as I can get SSB to work anyway!), even the speaker, but howls above volume setting of 15. The distance between mic and (tr)uSDX does not seem to make a difference, odd.

Anyway, here is the skinny on modifying the Baofeng mic for use with the (tr)uSDX. You'll need the mic, two 3.5mm TRS (the Audio one can be TS only if you like) connectors or pigtails (I used pigtails from Amazon), some heatshrink, and a steady hand for butt splice soldering small wires together.

On the 3.5mm TRS pigtails, Red is Tip, White is Ring, and Black is Sleeve.

Baofeng Spkr Mic s.jpg
Baofeng Spkr Mic s.jpg (247.11 KiB) Viewed 3022 times
Baofeng Spkr Mic Wiring s.jpg
Baofeng Spkr Mic Wiring s.jpg (245.47 KiB) Viewed 3022 times

Have fun!

73,

Robert, WA2T
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

P.S.

Even the little red light on the mic illuminates when PTT is pressed.

AND, the 3.5mm headphone jack on the bottom of the mic next to where the cord comes out of the case works too!

73,

Robert, WA2T
Df5GF
 

Posts: 16
Joined: 31 Dec 2021, 10:01

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by Df5GF »

Hi,

my occupancy jack plug

Audio: Tip ---green
GND ----white

MIC: Tip---black
Middle ----red
GND -----white

73

Franz DF5GF
Last edited by Df5GF on 13 May 2022, 09:25, edited 2 times in total.
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

Hi Franz,

I do not understand what you've posted.

73,

Robert, WA2T
Df5GF
 

Posts: 16
Joined: 31 Dec 2021, 10:01

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by Df5GF »

Thats my connections with BOAFENG -----mike /speaker
Attachments
Bildschirmfoto 2022-05-13 um 11.32.jpg
Bildschirmfoto 2022-05-13 um 11.32.jpg (49.75 KiB) Viewed 2889 times
dl6sez
 

Posts: 60
Joined: 30 Dec 2021, 22:54

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by dl6sez »

Hello Franz,

resending pictures from Manuels Manual for (tr)uSDX
makes no sense for me :)
The hint to look into the Manual would be useful maybe
and there is already a drawing in this Manual how to connect a speaker-mike..

https://dl2man.de/4-trusdx-manual/

73 de Chris DL6SEZ
Chris DL6SEZ, JN48XL near Ulm, Southern Germany
M0MZB
 

Posts: 4
Joined: 12 Jan 2022, 19:56

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by M0MZB »

Is there anyway to adjust the mic gain in the radio menu...i have connected a similar mic but it seems to need a higher gain
hb9hem
 

Posts: 36
Joined: 07 Jan 2022, 04:39

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by hb9hem »

One thing to note: The Baofeng mics seem to have 8Ω speakers vs 32Ω in the default kit. At least the two cheap mics I just received in the mail have 8Ω. The RX current will go up.
User avatar
DH2LAB
 

Posts: 42
Joined: 08 Mar 2022, 01:39
Location: Kiel
Contact:

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by DH2LAB »

hb9hem wrote: 15 Jun 2022, 02:54 One thing to note: The Baofeng mics seem to have 8Ω speakers vs 32Ω in the default kit. At least the two cheap mics I just received in the mail have 8Ω. The RX current will go up.
As a simple protection you have R23.

Image
73 de Matt, DH2LAB
hb9hem
 

Posts: 36
Joined: 07 Jan 2022, 04:39

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by hb9hem »

I got fed up with my bad cable assemblies so I decided to create my own 3D-printed plug to connect a Baofeng mic to the (tr)uSDX. The mic I chose is too small, though. I recommend the normal ones unless space is a concern. Here's the writeup.

Image
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

hb9hem wrote: 15 Jun 2022, 19:11 I got fed up with my bad cable assemblies so I decided to create my own 3D-printed plug to connect a Baofeng mic to the (tr)uSDX. The mic I chose is too small, though. I recommend the normal ones unless space is a concern. Here's the writeup.

Image
Nice job! I would have liked to perhaps see accommodations for a screw and a "socket" for a nut to hold the halves together (look at Prusa MK3S+ heatbed cover as an example). Nonetheless, very nice!

73,

Robert, WA2T
hb9hem
 

Posts: 36
Joined: 07 Jan 2022, 04:39

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by hb9hem »

accommodations for a screw and a "socket"
Good idea .... and several attempts later, here's the result - I'm getting better with Fusion360 :)

Image

STL files, etc., are here , if anyone is interested.
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

Nice job Markus! Thank you.

73,

Robert, WA2T
Kris
 

Posts: 1
Joined: 16 Jul 2022, 21:41

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by Kris »

Is there an external microphone that can be used for (tr)uSDX directly, without modification? Microphone only.
dca123
 

Posts: 3
Joined: 18 Apr 2022, 18:33

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by dca123 »

I have a question...

Could a yaesu 3.5mm microspeaker work with a microphone and speaker splitter?

Example: https://amzn.eu/d/8MPRsOS

Thanks
wa2t
 

Posts: 178
Joined: 01 Jan 2022, 16:30

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by wa2t »

dca123 wrote: 27 Jul 2022, 03:11 I have a question...

Could a yaesu 3.5mm microspeaker work with a microphone and speaker splitter?

Example: https://amzn.eu/d/8MPRsOS

Thanks
Compare the connections of that cable with the (tr)uSDX connectors: https://dl2man.de/4-trusdx-manual/ I would venture to say the answer is no.

73,

Robert, WA2T
dca123
 

Posts: 3
Joined: 18 Apr 2022, 18:33

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by dca123 »

Could I use a baofeng mic, with a kenwood adaptator to 3.5mm Jack and use a splitter to audio and microphone?
AntonR
 

Posts: 17
Joined: 23 May 2022, 10:44

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by AntonR »

I ordered the Baofeng handset, and had the following wiring;

Green: ground
Red: mic
Black: PTT
White: speaker
00B3790D-5A7C-438B-8D64-2ECD569128DF_adobe_express.jpeg
00B3790D-5A7C-438B-8D64-2ECD569128DF_adobe_express.jpeg (110.73 KiB) Viewed 986 times
Anyone reception reports with this mic? (Could not make a QSO yet)

73,
Anton PD5ANT
w3fis
 

Posts: 7
Joined: 30 May 2022, 14:24

Re: Modifying a Cheap Baofeng Speaker Mic for (tr)uSDX Use

Post by w3fis »

M0MZB wrote: 21 May 2022, 17:49 Is there anyway to adjust the mic gain in the radio menu...i have connected a similar mic but it seems to need a higher gain
You can adjust the drive level in the radio
Post Reply