volume control with Potentiometer
Recently i captured this circuit in eagle to publish online, it seems to have a small design error. It worked well for many years. The step-down transformer is used as a step-up here. The secondary winding was around 50mA so the resistance was protecting the 2N2222. C1 and R3 may need tweaking to get the desired adjustment range in R2.
The Source file is here del00005.zip
This was done as repairing home electronics was my hobby in
school days, I learnt by building Amplifiers based only on
transistors from the Old Philips Circuits and Books. The above
one is TDA2020 means 20 Watts Per Channel, with LED input level
meter and moving-coil output meters. It would have a 5 pin din
input and RCA speaker output, input for phono, tape, etc. The
Speakers had a woofer, tweeter and midrange with passive
20th May 2020
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