This preamplifier for phonographic capsules using FET was found in 90s American documentation. Consumption is very low. The power can be obtained from the amplifier circuit with which it works.
This echo or reverb chamber circuit uses a delay line well known at the time it was published...
This ouput push-pull stage using bipolar transistors was found in a publication of the year 1968....
September 2106 - Mouser Electronics already has in stock the new LDOs (Low Drop) from Infineon for...