Monday, March 21, 2022

The fabulous sound of Philips Babette 12RL472 battery descrete transistor radio

signal path: FM radio stations in Athens _ Babette signal taken from the 5th transistor ie at the 2 diodes descriminator stage (tape out DIN socket) - Realistic Disco Mixer mic in _ Sennheiser HD580 - Listener's brain

Radio Theme part 2

Vicky beautifully changed melody EA, DG, E#F to EDA, EDG, ED#F going firstly down and then up. The bass code is F7, E7, D(+3),9. (at the last chord key modulates from Aminor to A Dorian, hence the F sharp). So melody serves everithins in just 2 parts (voices) including bass. How would it sound played with mandolins?

Thursday, March 3, 2022

How would the Pleiades V6 electron tube amplifier sound immediately after a DAC IC?

Can it be USB powered since it already operates at only 5 volts? Or should a DF type electron tube used or a BC549 or a 2SK170 for example, single ended class A but with input and output transformer?

DAC with electron tube amplifier

Met Lefteris after a few years. He handed his schematic of the digital part of his usb DAC. He mentioned his listening tests with electon tube amplifiers after the op amps or abandoning the opamps for electron tubes. Possible schematics EMI RS61 or BTR2.