The author posted a question in Goods and Services
About the preamplifier on the K140UD1A operator? and got a better answer
Response from Антон Владимирович[+++++]
The easiest way is to set the HF, LF and MF timbre circuits before the Op-Amp via 20kOhm resistors from each variable resistor slider to the 9th leg of the Op-Amp and from it an OS resistor 150kOhm to the output. The frequency filters go to the top legs of the 22 - 47kOhm variable resistors is 22 better?
Response from 0[+]
The easiest way to set the tone circuit HF LF and MF if you need to set before the Opus through resistors 20kOhm from each slider of the variable resistor to the 9th leg of the Opus and from it a 150kOhm OS resistor to the output. Frequency filters go to the top legs of the 22 - 47kOhm variable resistors 22 is better
The easiest way to set the tone circuit HF LF and MF if you need to set before the Opus through resistors 20kOhm from each slider of the variable resistor to the 9th leg of the Opus and from it a 150kOhm OS resistor to the output. Frequency filters go to the top legs of the 22 - 47kOhm variable resistors 22 is better
Response from 0[+++++]
Heh heh. dear man, whole treatises were written on the subject. and you here 10 comms and 1 mohm. and why 140ud1. it is already 300 years old. and the main thing - why?
Heh heh. dear man, whole treatises were written on the subject. and you here 10 comms and 1 mohm. and why 140ud1. it is already 300 years old. and the main thing - why?
Response from 0[+++++]
there are a lot of options! You have to consider the problem multilaterally. 1. noise 2.bandwidth with the chosen gain 3. signal level at the input - the complexity of screening. better to use specialized ICs such as 538 un3 538un1 True, 20 years no one does it, they use old circuits!
there are a lot of options! You have to consider the problem multilaterally. 1. noise 2.bandwidth with the chosen gain 3. signal level at the input - the complexity of screening. better to use specialized ICs such as 538 un3 538un1 True, 20 years no one does it, they use old circuits!