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Microphone and SSB calibration

 

I have slowly made progress with the X1M. Now I have narrowed down a SSB issue to the microphone. Having read the instructions on one of the online configuration PDFs I would like to know if there is a way to calibrate without any meter or additional hardware.

All I have is the X1m and a SW receiver which can be used to pick up a transmission.

Currently the SSB transmissions are extremely garbled and muffled, but they are on the correct frequency.

thanks,
 

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On your issue, SOMETIMES what you describe is caused by the very small hole in the mic case that goes to the mic element. ?Many of us have drilled out that hole to about 1/8-3/16” and then stuffed the hole with a small piece of foam. ?The original hole in the mic is too small for the element to hear well.

I would try this first, usually calibration is not required. ?You probably will not get a good sound out of your receiver due to overloading, at least with my efforts to do that never really worked. ?It’s best to get a report from a somewhat distant station.

Perhaps someone else has a better idea ?

John
KK4ITX?



Visit: ?. ? ?

On Jun 13, 2021, at 20:21, Mr A G <2gatos@...> wrote:

I have slowly made progress with the X1M. Now I have narrowed down a SSB issue to the microphone. Having read the instructions on one of the online configuration PDFs I would like to know if there is a way to calibrate without any meter or additional hardware.

All I have is the X1m and a SW receiver which can be used to pick up a transmission.

Currently the SSB transmissions are extremely garbled and muffled, but they are on the correct frequency.

thanks,

 

First, put the mic in the garbage and source a better one, not from Baofang. Maybe an old RT mic.
There is no written process for the X1M as regards any service. It is a simple circuit and fairly easy to follow along despite the sketchy schematics found online.
By far the best way to get in the ball park is with a scope sensing the output into a dummy load.?
Failing that it will have to be an arranged QSO to give you time and patience from them to make the adjustments.
As you've got this far you already know where the mic gain control is situated. These little surface mount pots go 360 and round again. You will have to talk and twiddle at the same time. I make a small mark on the pot and pcb to denote the optimal settings for future reference.?
I'm sorry I can't be of any more assistance. I've worked on two of these so far.
Listening to oneself on a radio is a fruitless task but will get you to a point of transmitting something in the audible range.
The only other thing to look at is the BFO offset in the settings menu, by default it should not be too far off the mark but will need tweeking for each radio as the filters will not be the same.
There are videos online to explain the process. It is a case of balancing your receive on an AM station in both LSB and USB to be the same.
Best of luck.

Nigel

Kia Kaha


On Mon, Jun 14, 2021, 12:22 PM Mr A G <2gatos@...> wrote:
I have slowly made progress with the X1M. Now I have narrowed down a SSB issue to the microphone. Having read the instructions on one of the online configuration PDFs I would like to know if there is a way to calibrate without any meter or additional hardware.

All I have is the X1m and a SW receiver which can be used to pick up a transmission.

Currently the SSB transmissions are extremely garbled and muffled, but they are on the correct frequency.

thanks,

 

Thanks for the information on the microphone.

I will also try readjusting the mic pot as I did with the CW tone. Using a SW receiver will help set the mic setting and I will try a larger hole with foam.

Has anyone attempted to work out a XML file for the X1M which could be used by FLDIGI?

T

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