Just a quick post to pass on a humorous and sad bit of sabotage found in a Cobra 2000 today.
You really should bolt down the final BEFORE you solder the leads to the circuit board.
A friend sold this radio, and the buyer complained that it stopped transmitting.
He forgot to mention the sabotage he did to it.
Always bolt the transistor down to the heatsink before you solder the leads to the pcb foil pads. This guy soldered them first, but in a position that pulled the transistor body away from the heat sink.
No mystery behind this "no transmit" complaint.
73
You really should bolt down the final BEFORE you solder the leads to the circuit board.
A friend sold this radio, and the buyer complained that it stopped transmitting.
He forgot to mention the sabotage he did to it.
Always bolt the transistor down to the heatsink before you solder the leads to the pcb foil pads. This guy soldered them first, but in a position that pulled the transistor body away from the heat sink.
No mystery behind this "no transmit" complaint.
73