GREY 200 LINEAR AMPLIFIER SHOWS SOME AGE, I BOUGHT THIS AMP 20YRS AGO FROM MY RADIO REPAIR MAN IT HAS BEEN VERY RELIABLE I DON'T TALK SKIP JUST LOCAL I'M NOT LONG WINDED SO IT HARDLY EVEN GETS WARM, OVER THE LAST YEAR I'VE NOTICED WHEN I SWITCHED IT TO SSB IT TENDS TO NOT WANT TO RETURN TO AM UNLESS I ROCK THE SWITCH BACK AND FORTH AND THEN IT HAS ALWAYS RETURNED I SUSPECT IT'S THE SWITCH BUT I'M NOT A TECHNICIAN OTHER THAN THAT I'VE HAD NO ISSUES WITH THIS AMPLIFIER AT ALL AND BELIEVE AS LONG AS YOU LEAVE IT IN THE SAME SETTING YOU WANT HAVE ANY PROBLEMS, THANKYOU FOR LOOKING WALTER!!! NO RETURNS!!!