• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:

icom vhf f521 dtmf

  1. M

    F521 DTMF microphone compatibility

    I'd like to use a DTMF microphone for phone patch and echolink on the local ham repeaters using my F521, but prices for the MH-133 and HM-118TN are much lower than the ICOM recommended HM-100TN (about $45 more). Are there other mics compatible with the F521, or do I really need the HM-100TN? Thanks.