Quote:
Originally Posted by 3Guncolor
I hooked up one of the D-tv converters (RCA) to my roundie color Zenith using a 75 ohm to 300 ohm balun on the back of the set to the factory antenna terminals. No noise what so ever.
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Luck is on your side. Maybe RCA was having a good day when they made yours.
I still think the chief radiation of digital hash from those is likely out the power cord. There are isolation coils that are used, but perhaps some of those filter setups are better than others. I suppose the cord could be turned through a small toroid a few times right at the back of the unit to solve any such problem....
BTW on a brief side note I got my first VCR when my main TV was indeed a Zenith roundie. Some movies had a bend at the top of the screen, indicating a horizontal sync issue. I pulled the back off the set and disabled the sync circuitry long enough to fiddle with the horizontal and vertical controls to study how the horizontal and vertical blanking bars crossed each other. There was a skew or offset of the horizontal blanking bars at each vertical blanking bar. (Hmmmnnn... The horizontal phase detector must be having trouble recovering from the obvious change in phase...) I solved the problem by altering the value of some capacitors in the circuit so that it would act more quickly. The result was no more bend of vertical lines in the picture at the top. The penalty was more susceptibility to horizontal jittering with noisier pictures of fringe-strength stations. I was tempted to put in a switch so I could choose between one way and the other, but never got a round tuit.
Mixing old tech with new is bound to prove amusing from time to time....
