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3 people found this helpful
Missing components and dry joints
on 6 April 2017
I ordered 2 of these RX/TX pairs. I only actually wanted the transmitters, as the receivers are known not to be very good (buy a superheterodyne one instead). Anyway ... out of the two transmitters delivered, one was missing a 56K resistor (shown in the pic) and the other seems to have a dry joint on the transistor (shown on the left in the pic). This makes one useless all the time, and the other mostly useless unless I flex the board to make the contact. I've managed to fix one of the boards by replacing the missing surface mount resistor with a through hole version, but even so, not good, even considering the cheap price.