My HM-36 that came with my 7410 is junk. Got reports of a loud rushing sound when I keyed up. The newer ICOM HM-36's are complete rubbish. I bought a new HM-219 from R&L and it's a huge improvement. It's on the small side, but fits my hand well. It has a solid feel and a nice heft. It resonds nicely to my rigs transmit audio adjustments. It doesn't need any Bob Nagy hacks, either.
I bet it would match up nicely with an Optima mobile. Sold mine, so can't try it.
https://www.dxengineering.com/parts/ico-hm-219
I bet it would match up nicely with an Optima mobile. Sold mine, so can't try it.
https://www.dxengineering.com/parts/ico-hm-219