Wrong thing, that is a VOLTAGE REGLATOR, but what is needed is a voltage stabliser, so it evens out the spikes to produce a average.
The one you show is to get an output at a particular amount, which you can adjust.
The stablisers can be found on the back of capri/cortina/escort clocks, a little oblong metal block about 1 1/4" by about 1/2"
tabetha