Hello to all ,first of all sorry about my bad english .
I buy this preamplifier in mint state but inside is haos
Here's what I've done so far
Full Recap with Elna ,Panasonic And Nichicon KZ and some Nic
All small 1uF with wima MKT
all vd1212 change to double 1n4448
all potentiometers and switch`s cleaned in Ultrasonic Bath
Variable resistors changed and tuned to +-20mV
First problem is the ends diodes d315 and d316 i measure
Left 1.45v and 0.9v
Right 0.7v and 0.2v
and normal is 2.4v and 2.1v
I already tried
Swap output transistors from first chanell to second one, Polystirene cap,
Change d315 diode etc.
Measured value is the same
Thanks
I buy this preamplifier in mint state but inside is haos
Here's what I've done so far
Full Recap with Elna ,Panasonic And Nichicon KZ and some Nic
All small 1uF with wima MKT
all vd1212 change to double 1n4448
all potentiometers and switch`s cleaned in Ultrasonic Bath
Variable resistors changed and tuned to +-20mV
First problem is the ends diodes d315 and d316 i measure
Left 1.45v and 0.9v
Right 0.7v and 0.2v
and normal is 2.4v and 2.1v
I already tried
Swap output transistors from first chanell to second one, Polystirene cap,
Change d315 diode etc.
Measured value is the same
Thanks