Thanks for Your answers ! Well , I might manage to fix this amp without a schematic .... the MK 2 schematic is a good help
even if it differs some from this amp , many values are the same. I have soldered a 3K resistor in parallell with each
trimpot to slow it down and make it less sensitive. Now , with
new NOS Siemens E88CC its very easy to set those +90VDC .
Tomorrow I´ll put in the new 6550 Tungsol reissue powertubes
and set the current to 60 mA or so . I have some problem to
order new 800-1000uF/450V caps from Mouser . And that 530uF/150 V cap too . Another question : is it silly to
spray a trimpot with oxidecleaner ? Or/and contact protect ?
even if it differs some from this amp , many values are the same. I have soldered a 3K resistor in parallell with each
trimpot to slow it down and make it less sensitive. Now , with
new NOS Siemens E88CC its very easy to set those +90VDC .
Tomorrow I´ll put in the new 6550 Tungsol reissue powertubes
and set the current to 60 mA or so . I have some problem to
order new 800-1000uF/450V caps from Mouser . And that 530uF/150 V cap too . Another question : is it silly to
spray a trimpot with oxidecleaner ? Or/and contact protect ?