pedromigcruz

I have had a quick look at your pic of the board there looks to be a few solder joints that may need doing again but I could be wrong.

 

I have ringed them in red.

 

When I work with double sided boards I always make sure it well sorldered as in it come out the other side as well.

http://mcgcs.net/pics/pack.jpg

Although it seems like a bad solder, there is continuity in between lower pad and upper pad because the holes are Pre tinned from factory.

Thanks for your help and patience.

At this point 5 beltpacks are confirmed to suffer from the same symptom, it can be because I’m supplying 12v to the psu instead of 24v, but I’m not sure why I also get the same problems once I connect it to an Altair or ASL base station

When carrying out the tests are you wearing the headphones or do they just sit on the bench?

 

Could this be feedback? Either acoustic or mechanical?

Hi! No that wasn’t feedback. Thanks

I will start now the tedious task of double checking resistor values.

In case you wonder how my PCB looks like:

https://drive.google.com/file/d/1mcIIMAk3kK11cnHaeE0WE4Hiqv7EtE5y/view?usp=drivesdk

Thanks guys

One of ours did something vaguely similar but that turned out to be a high resistance resister not applying enough negative feedback to a stage.

From that:

Are running too much mic gain/ do you require this much gain? I find we run the bluecom packs at well below 50% headphone volume.

Have you misread one of your resister colours and fitted the wrong value.

Sorry the late reply Sunray.

Well I noticed that if I use higher gain in microphone, and less volume amplification it gets better than the other way around.

I don’t believe I got it wrong with resistors value because they have the values printed in individual bags for each value. But of course ###### could have happen. I will try to check the values again.

Thanks!

Hi Sunray! Thanks!

I see, but should that happen if I plug it to another main station? I plugged 2 bluecoms to an Altair WB-200 which is Asl/clearcom compatible and I have exactly the same results. I will try with 24v feeding the PSU, but my main target for these beltpacks is using them with other main stations as well :/

Cheers

Pedro Cruz

Hi everyone, I finally made 5 beltpacks and 2 psu. I’m still missing the panels but that should be sorted soon.

So far my test went great except for one thing. If my volume knob is set at full volume, there is a lot of oscillation on the volume. when I press call, the led blinks and it can be heard on the headset. If my volume knob is at 50% nothing wierd happens. The led lights up and I can still communicate nicely. Only in between 75%-100% the led goes flashy and communications also get chopped.

Seems there is not enough juice for the amplifier. atm I’m using 12v 2A for 1psu and 2x beltpack.

Do you have any idea?

Headset I’m using is single ear Beyer Dynamic DT 108-200-400

Best!

Hi everyone! im also looking for Bluecom PCBs. If you have some left you are willing to get rid of, just let me know.

Thanks in advance!

Pedro Cruz