Hi everyone. Yes, this is yet another “What cable for my HT?” post.
Looking at the pinout in the IC-T10 advanced manual, the speaker mic jack uses 2.5mm TRS & 3.5mm TRS connectors, with a 5v output on the ring of the mic (2.5mm) connector. The product images for the ICOM HT cable show TS connectors for the HT end. This would short the 5v bias to ground.
Is there an alternative cable I can use?