Motorola RMN5050A Desktop Microphone
We have changed dip switches in the mic to get hot mic with no paddle pressing, and making both paddles ptt. Then there are some chip resistors in the audio path that need there value changed, but I don't have the info handy, I will dig it up later if I make it back to my shop.
Convenient microphone option for when you are operating the mobile on a desktop. Transmissions are easier for control station users as the microphone does not need to be picked up. Large push-to-talk buttons are easy to access.
As some additional information on this microphone, you will notice that there is a multi position switch located inside the mic to allow the mic to be configured for different radios.
(Monitor before transmit, separate grounds for PTT and mic low, etc.)
You will find this info in no manual. If you call the System Support Center they will read you the functions of the various switch positions but they can not fax or email any documentation. I have included the switch functions in this email so you don't have to go through the same problem.
RMN5050A Motorola Desk Microphone Switch Settings ;
RMN5050A RMN5068 replaces HMN3000B Switch Settings ;
https://motorolamic.blogspot.com/
VE3WZW Andre
We have changed dip switches in the mic to get hot mic with no paddle pressing, and making both paddles ptt. Then there are some chip resistors in the audio path that need there value changed, but I don't have the info handy, I will dig it up later if I make it back to my shop.
Convenient microphone option for when you are operating the mobile on a desktop. Transmissions are easier for control station users as the microphone does not need to be picked up. Large push-to-talk buttons are easy to access.
As some additional information on this microphone, you will notice that there is a multi position switch located inside the mic to allow the mic to be configured for different radios.
(Monitor before transmit, separate grounds for PTT and mic low, etc.)
You will find this info in no manual. If you call the System Support Center they will read you the functions of the various switch positions but they can not fax or email any documentation. I have included the switch functions in this email so you don't have to go through the same problem.RMN5050A Motorola Desk Microphone Switch Settings ;
RMN5050A RMN5068 replaces HMN3000B Switch Settings ;
https://motorolamic.blogspot.com/
VE3WZW Andre
I have only taken the bottom cover off to get at the dip switches. Sorry I do not have the function of all dip switches, one of our techs called motorola and they told him what switches to set, we haven't seen a schematic yet either.
ReplyDeleteThe main problem with the new RMN5068A Desk microphone that replaced the HMN3000 is that it works with the Motorola mobiles but doesn't work with dispatch solutions such as the MC series desksets and the Commandstar lite console all of which are manufactured by CML. What we discovered is the mic DC voltage supplied by the mobiles is around 5 to 7 volts. The mic dc that the CML products supplies is almost 12 volts. The HMN3000 tolerated the higher voltage without affecting the mike audio. The new
ReplyDeleteRMN5068A can't tolerate that higher voltage and causes the mic amplifier circuit to go into distortion.
We have modified the new mic by bridging a 680 ohm resistor across mic high to mic low in the mic. The resistor drops the mic DC voltage allowing the RMN5068A to work with the CML products with great success. We presently have about 20 RMN5068a working on MC series desksets. This modification is not from Motorola so it is not sanctioned by them but works every time.
As some additional information on this microphone, you will notice that there is a multi position switch located inside the mic to
allow the mic to be configured for different radios. (Monitor before transmit, separate grounds for PTT and mic low, etc.) You will find this info in no manual. If you call the System Support Center they will read you the functions of the various switch positions but they can not fax or email any documentation. I have included the switch functions in this email so you don't have to go through the same problem.
New Motorola Desk Microphone
RMN5068 replaces HMN3000B
I have the motorola documentation on this if you want it
ReplyDeleteplease that would be great
Deletethe documentation for the RMN5068 MIC by Motorola, If you have it, please share ... see contact on the right side
ReplyDeleteHow can I fix the mic in these set
Delete