One of my friends ask me for help with refurbishment of his old turntable. I thought why not. After quick phone call I went to see what is going on. Apparently motor stop working entirely. At owners place I find out that TT is Swiss made Holborn with tonearm Kuzma strogi S. Thought finally something interesting. Unfortunately I find out that TT was taken apart 😦 This ain’t gonna be so easy.
TT was in pretty bad state. Bumped and scratched, control probe (capacitive sensor) was broken and make it hell even more, manufacturer erased coding from IO. Acrylic platter was all tacky from glue. Cables in tonearm gone… Loads of work to do.
1) sand and paint MDF plinth
2) remove glue and polish acrylic platter
3) refurbish and paint tonearm, new wires
4) fix motor and electronics
5) adjust it properly
Sand and was a quick job, painting was left to professional company. Remove glue from acrylic platter took me ages, but i made it. Re-wire tonearm was shit job tho. Tonearm is filled with plastic and hole used for wire was sealed. I had to drill new hole to be able to install new wire. Old wire was used to pull new one – nervous racking operation. Tonearm also taken apart, cleaned, greased and got spanking new powder coating.
Now I’m trying to resolve problem with broken motor. This unit is actually pretty low quality. Reminding me DC motor from a toy which making noise in higher RPM. Voltage is quite low at 0,7V / 33 rpm. or 0,95V / 45 rpm. Quite curious is fact that motor is suspened on piece of reel tappe instead of rubber.
Holborne – swiss audio instruments official webpage
Thank you for reading and please comment.
About author of article:
Libor is coming from Czech Republic and currently specialising in hifi servicing and upgrades.
Please visit his webpage at BB audio.net