NS-40 Class E Transmitter


One thing to note - from the appearance of the board, I think they have been plated with the lead-free, silver based tinning. This stuff will tarnish over time, so the boards should be handled as little as possible before assembly, and kept wrapped, away from air until kitting. (which we did, ITP). In my limited experience with the silver tinning, I have not seen any issues with solderability of tarnished pads, but to those familiar with the old tin-lead process, it sure 'looks' a lot different.

73 - Dave NM0S