This RL Drake TR-4C Original Noise Blanker Jumper Plug, is used when the optional noise blanker board is not installed.
It is factory wired for the TR-4C but it can be reconfigured for the R-4C...
RL Drake 9NB Noise Blanker (for TR-6 Six Meter Radio) ORIGINAL Instruction Manual in As New Condition #1
All Pages and schematic diagrams are in great shape unless noted otherwise.
This Manual comes...