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I just bought a used Nottingham Horizon. I noticed right away that as soon as the platter starts spinning, I can feel a lot of vibration all along the arm tube from the finger lift at the headshell all the way down to the base or support pod. I have never felt this almost electric, humming vibration on any arm before. Is this normal? No noticeable, audible hum other than usual preamp noise....I am using an RB300
Anyone with direct experience of this I would appreciate hearing from you. Thanks, Tom
Follow Ups:
Hi,I've never experienced anything like this, and I also have the stock Horizon. It sounds as though something somewhere (at the arm base perhaps?) might be rubbing against the spinning platter.
Another consideration is that Nottingham don't advise tightening up the arm mounting bolts too much. Ideally, the two hex bolts that secure the arm should be just tight enough to hold it at the right height. I have met set so that the arm can be swivelled in its mounting if you twist it, but doesn't move in normal use. The two bolts on the top of the silver arm mounting shouldn't be overtightened either.
It would be worth checking that the main bearing has the right amount of oil and that the motor is adjusted to the correct height. Other than these ideas, one is driven to suspect a fault - perhaps someone adjusted the motor by pushing down on the pulley (ouch!), or it was damaged on its way to you. See the Nottingham Dealer Manual on the ASL Group site, and their FAQs page.
HTH,
Mark
Hi Mark,Thanks for your suggestions. I tried the opposite approach and tightend the collar and base screws. I will loosen them.
This is the non-SE version. I will check to see if I can adjust the motor height when I get home but most of the motor is submerged in the plinth. Finally, I will add even more bearing oil. Apparently it wasn't drained when it was shipped. Nonetheless, I added 12 drops. I will add more til it leaks...this might do the trick as the vibration only occurs when the platter is spinning, and actually about 3 seconds after it spins.
Is it an "SE" model? If so, make sure that the motor is not touching the body. Also, I put some isolation material under the motor to further isolate any vibration from traveling through the 3 feet. It was easy to adjust the motor height to accomodate it. Mine is silent and free of any noise or vibration.
It is NOT and SE model. The vibration in the arm stops as soon as the platter stops spinning - even while the motor is still on. I have tightened up the two hex bolts that lock the arm and the single hex bolt on the arm pod. Even the cartridge vibrates!
I don't have one but but do have some experience with tonearm wires exiting and contacting the base. They could be picking up the vibrations. Proper wire dress is so key to good performance of any table.
Everything is ALMOST all together. I have the TT. I have my Graham 2.2 (gold trim). I have two additional armwands, enabling me to attach my Lyra Helikon mono, Benz Ruby 2, and Benz L2 wood. I have the IC-70 phono cables. SSSOOOOO what's holding up everything.........Nottingham evidently doesn't have many requests for Graham armboards!!! They have to make one from scratch just for me!
I'm already to sell my two Rega 5s that I picked up last Thanksgiving.
It HAS TO BE ready this week...........oh please dear God....
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