30W Amplifier (T1544E)

This hi-fi amplifier is from a 1975 RCA tube manual. The critical components are the transformers. Power supply is included.

1 kHz Band Pass Filter with Two Operational LM3900 (CB14190E)
We found this circuit with a Q factor of 25 in the Linear Applications Handbook by National...
Transparent Octal Latch (CB15750E)
The circuit shown in the figure on the right can be used on a data transfer bus with the use of an...
Astable NAND CMOS V (CB19543E)
This multivibrator circuit uses only one gate and its frequency is controlled by the crystal. The...