This document describes the design, simulation, construction and characterisation of a versatile 3-channel general-purpose benchtop linear power supply. Linear PSU's can be fixed, for example, as a 5-V supply that you might need for a logic circuit, or several fixed supplies needed for a PC (+5, +12, or -12V). On a bench lab-type PSU, you would want to use a variable PSU. The consequences of regeneration of the regenerative TRF receivers are the radiation and unwanted coupling of the antenna and the L-C. A broadband 100W linear RF power amplifier covering LF, MF and HF radio bands was created by modifying the 1W in, 100W out, 1. 8 to 54MHz amplifier designed by Jim Veatch, WA2EUJ, Appendix 1, that utilizes NXP's LDMOS MRF-101A transistor made for RF power applications. NOTE: There is no instruction on how to build any of this stuff. You must use your own wits (or just Google it!). Figure 103 : Random Circuit. Although there is a tendency for short wave listeners and Radio Amateurs to use ready made equipment these days, greater satisfaction and enjoyment can be gained from the hobby by using home constructed equipment. Modern FPGAs and processors are built using advanced nanometer processes because they often perform calculations at fast speeds using low voltages (<0. 9 V) at high current from compact.