After discussion and experiences of other MIC Kenwood revivers MC60 som bol upozornený, že úprava prepojenia na konektore pin 7 s 8 nie je vhodná z dôvodu obídenia filtrácie v TCVR. So I am attaching an even more correct option to connect pin 8 of the MC60 mic connector with a suitable wire to the minus item at the connection point - the battery pole. So I leave it to trial and successful use. I didn't consider it necessary to look at the wiring diagrams, because it works for me in this modification at the moment.