Another RFI mod of a speaker mic for DMR use
I bought a remote speaker-microphone (RSM) for a DMR portable from eBay (~$12 posted). Experience says that these suffer RF ingress which is seriously bad in DMR due to the amplitude modulation of the transmitted signal. This RSM had somewhat improved filtering around the electret compared to others I have purchased. Last update: 27th June, … Continue reading Another RFI mod of a speaker mic for DMR use