Suggested by Mullard in a1969 documentation, this circuit generates the erasure signal for tape recorders of the time. Transistors can be modern equivalents like BD136 and BD136.
This 3 + 3 V symmetrical source circuit uses an old operational amplifier. The circuit is from an...
This circuit for low frequency data transmission was found in the May 1977 issue of Radio...
This circuit was obtained from an English documentation, with the purpose of carrying out the...