|Radio and Electronics (DED Philippinen, 66 p.)|
|10. BLOCKS OF RADIOS / -1- / POWER SUPPLIES|
|10.5.1. GENERAL REMARKS|
Every voltage source have a so called internal resistance which causes voltage drops at their terminals if any load current is drawn from the source.
If the current is varied - (as shown above this is always the case with radio receivers) - therefore the voltage supplied at the terminals of the source will vary too (as shown in fig. 100)