ocr: Press any key to Quit. RF bsorption Nattmeter. (C) - B.Walker, (GOLCU). The Sampling Head Issemb ly. LUHAIHL RESISTUR PL1 Sampling Head. 50 JHMS. RAA W R2 IP1e TP29 VR1, SK2 & PL2 See text. - - skify C1,C2 a=2off -C3 carth lags. a m -Spec ial Box,see text.D1-D2- Keep the leads of C3, L D2 - and - D1 as short as possible. The 50 Ohm Coaxial Resistor (R2) can be obtained from "MAPLIN" and the Urder Code is ZA10L. This is the single most expensive item in the project. It is commonty known as an "RF DUMMY LOAD".