RL Drake SWR Calculator Reproduction for W4 Wattmeter

This RL Drake SWR Calculator Reproduction for the W4 Wattmeter, is required to calculate the forward and reflected power measured with the Drake W4 Wattmeter.The W4 meter originally came with a plastic SWR card to insert in the back of the meter. Many have been lost or mis placed so this is a great reproduction item which can be inserted in the back of the meter just like the original.This reproduction is made with laminated card stock and it looks great!