Labels:bulletin board | crt screen | earth | lemon | monitor OCR: 0.001 (A) FORWARD METER 120 1N918 CIRCUIT ANTENNA XMTR CONNECTOR CONNECTOR 0.001 1N918 /tINSUL ATORSt 120 TO REFLECTED METER CIRCUIT CENTER ROD PICKUP RODS {B} 5 T ON HF CORE XMTR LOAD 3 pF 3 pF 1N918 1N918 30 pF 30 pF Figure 2 SWR measuring instruments. (A) Transmission line directional coupler an extension of Figure 1. Sensitivity is much higher due to use of the diode detector. A typical unit made for the CB band S usable for the low power range from about 0.1 to 10 watts. B Coupler/ indicator which sepa- rates the magnetic and electric field coupling to the line. Careful construc- tion is needed to eliminate the effects of stray coupling see the ARRL other handbooks for design details. BI6N1 INSULATORSt
