Carlos, Yes, you can use the SA612 to replace the SA602. In fact, many SA602s are manufactured as SA612s, but marked as SA602. 73, Don W3FPR On 4/16/2020 8:20 AM, carlos.p wrote: > hi,there is an smd replacement for u1 ne602in my k2 kit > is it possible to use ne612an instead of the smd fixture > carlos >