gooday to all,
i buit several elekits succesfull, no problem at all,
this latest preamp preamp 8550 gives me trouble, one channel completely dead, most happening sooner or later hihi,
i dont expext an instant solution, thats not possible,
but maybe someone can se me on the right way to start, components are placed ok , so are tubes, they glowing ok,
im in the process of measuring voltage testpoints, maybe someone is familliar with the testpoint table manual,
under reference dc voltage elekit statet tp7 +2v tp tp8+2v tp17 +2v tp18 +2v , i can not find these points, maybe someone is familliar wth this manual or built the kit.......
regards carlos
i buit several elekits succesfull, no problem at all,
this latest preamp preamp 8550 gives me trouble, one channel completely dead, most happening sooner or later hihi,
i dont expext an instant solution, thats not possible,
but maybe someone can se me on the right way to start, components are placed ok , so are tubes, they glowing ok,
im in the process of measuring voltage testpoints, maybe someone is familliar with the testpoint table manual,
under reference dc voltage elekit statet tp7 +2v tp tp8+2v tp17 +2v tp18 +2v , i can not find these points, maybe someone is familliar wth this manual or built the kit.......
regards carlos
Try to trace where TP7–TP18 connect to. Often these testpoints sit near opamps, transistor pairs, or cathode resistor nodes in tube circuits.
good day,
have the elekit 8550 working, take me 1 hour to yesterday to find bad soldering, and bad tube,
now still one problem remains, excessive humming inreases with volume up, no volume is no humming,no phono or other devices connected,
all hints are welcome
regards carlos
have the elekit 8550 working, take me 1 hour to yesterday to find bad soldering, and bad tube,
now still one problem remains, excessive humming inreases with volume up, no volume is no humming,no phono or other devices connected,
all hints are welcome
regards carlos
