November 2007
Intermediate to advanced
736 pages
46h 32m
English
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REQUIREMENTS FOR AUDIO PREAMPLIFIERS
For the listener the most common source of program is undoubtedly the radio, followed by disc and tape in that order. The microphone is normally used only in connection with a tape recorder, apart from public address applications.
Radio tuners specially designed to feed a low-level audio signal to high quality amplifiers are now becoming popular. Tuner outputs vary, but it is normal to expect a signal level between 150 mV and 250 mV. Provision for an input to accept a tuner signal is, therefore, desirable and this input should have a high impedance normally from 100 kΩ to 500 kΩ.
Crystal pick-ups working directly into a preamplifier require a high input impedance, otherwise there will be considerable loss ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.