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If you can't get it exactly at 75us with the calculations, is it better to be slightly under or over the 75us?
I don't believe anyone can hear the difference between 73 or 76. Consider that the OEM theoretical came in at 72.5 and no one seems to notice. Throw in 5% parts at the receiving end and who know what at the transmitting end and you begin to appreciate how subtle these deviations are..
It's not unusual to see mid 70s tuners go with a 65Ás de-emph, halth way between 50 & 75 and it not that apparent.
Get it close and you'll be fine.
Yes, I was curious why H/K had their schemo specs on the deemphasis set at 72.5 us( and that's assuming perfect tolerance) but I would imagine it was because of the parts cost and tolerances available at the time. I am going to take out the caps and resistors soon and do some measuring to see where it currently stands. I'm sure that between the old parts and new 1% parts I'll be able to get tighter tolerance readings. Thanks for your input.
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