A nice person on this forum sent me an SP14 for testing purposes, as seen on the pictures. The problem is that there is a constant faint but audible "grating", "scraping" noise (both L and R), especially obvious on lead-in grooves and silent musical passages... which is a shame because the cartridge tracks very well. Even the end

I am now testing the phono. A nice person on this forum sent me an SP14 for testing purposes, as seen on the pictures. The problem is that there is a constant faint but audible "grating" noise (both L and R), especially obvious on lead-in grooves and silent musical passages... which is a shame because the cartridge tracks very well. Even the

Hi, The bouncing problem is now fixed. The idler wheel was not properly aligned. I took the opportunity to re-lubricate the shaft properly and deglaze the idler itself. It is still noisy though...

The new bridge, quite smaller than the old one! Solder joints not cleaned yet... The innards, with new components in place... The big top-left 0.47μF on the tuner PCB fouled the deck's suspension... I had to solder it underneath! This is due to the fact that the bakelite had warped a little, enough to cause this problem. The outside, not too

Hi Craig, Does this example use a bulb in the arm position detection circuit by any chance?

Here's what I've found so far in the receiver... First of all, both fuses were burnt. It turned out that one diode in the main supply bridge was shorted. Let's hope this was the problem! The tuner bridge seems okay though. Then there were three defective resistors in the amp quiescent current setting circuits: the two 560Ω (next to

This is a copy-paste of what I wrote in the "What are you working on" topic. [quote user="chartz"] Hi everyone, I'm currently working on a Beocenter 3500. Very dirty, and it had been stocked in a cellar for 10 years! I am about to re-cap and replace all the trimmers which are so corroded that they are completely black! I have

Looks great, Olly, thanks. You have a PM.

Hi, Thanks a lot. I guess an SP14 would do nicely! Looking forward to seeing the pictures!

Hi everyone, I'm currently working on a Beocenter 3500. Very dirty, and it had been stocked in a cellar for 10 years! I am about to re-cap and replace all the trimmers which are so corroded that they are completely black! I have completely removed the fascia and cleaned it (the B&O guys had a stock of screws to use or what? ). What a job. I