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Veronica Stereo Encoder
As you probably know, to enable stereophonic broadcasting, audio channels LEFT and RIGHT have to be specificaly encoded in such a way that FM receivers can reconstruct stereo.
This is a low cost, but powerful, stereo coder. Since the schematic is very 'clean' there's no full documentation available. Just note that :
* Trimmers adjust 19KHz pilot tone and output levels (see schematics).
* Cap. trimmer fine tune the 19KHz pilot tone frequency (from 76KHz crystal).
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Build your own LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and "Zero Out" function to make sure the readings are as accurate as possible ... [more] |
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