#7587
Guenther
Spectator

Hi All,

today I tried to build the 8054 circuit with the transistors AC173 and AC125 to compare both in amplification, current and collector resistor values.

As input I used a Cassette Deck output (DIN), as “control”  a headphone. After varying the resistor values (via pot) and changing the transistors I – subjectively – decided that 10 kohms (with 1.5 mA current over-all) gives the best result.

I really don’t know why the values of 10 kohms (Egger) had been changed (Braun) to 2.7 kohms – and this  not only in the #8054 blocks, also in the realized and planned BASTELSATZ PCBs!

Best,

Günther

  • This reply was modified 2 years, 7 months ago by Michael.
  • This reply was modified 2 years, 7 months ago by Guenther.
  • This reply was modified 2 years ago by Guenther.