This circuit is used in VHF and UHF superheterodyne receivers. The circuit is from the 1964 RCA transistors manual. Equivalent transistors such as the BF495 can be used.
Found in Maxim documentation from the 90s, this circuit makes use of components from the period. The...
Found in an English Maplin magazine in 1983, this circuit has an RIAA equalization. We suggest its...
In the figure we have a way of obtaining a 13,2 V with current up to 5 A using an integrated 7812...