Hi,
What change to adapt this pre-emp 75µS to 50µS :
Thanks
75µS to 50uS Pre-Emp
- reverend
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Re: 75µS to 50uS Pre-Emp
Rev
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Re: 75µS to 50uS Pre-Emp
The Rev is exactly right. Use accurate 220pF capacitors (not cheap ceramic ones), and be careful in setting up the HF clipper - it's easy to overdo it! It's also worth using slightly lower frequency filters (16 kHz is getting a bit too close to the 19 kHz stereo pilot). My filters use "gyrator" networks (to emulate inductors), and go over like a cliff at 15.15 kHz. By 19 kHz, they're around 74 dB down.
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