BeoGram

Re: Odd pitch problem with Beogram 1800

Søren Mexico — Sat, 13 Aug 2011 13:25:41 GMT

Check that he belt pulley on the motor is properly fastened, if not fasten it with Blue Lock Tite or with a little crazy glue, the right way is lock tite. Check your platter bearing is free from damage and wear and oiled, check the platter shaft is 100 % straight and without wear.

Re: Odd pitch problem with Beogram 1800

dbxdx5 — Sat, 13 Aug 2011 12:57:48 GMT

Ok, here's an update: Even after adjusting the speed, I'm still getting a weird pitch problem. It's almost like something is slowing down the platter at a specific point in each revolution, a speed "hiccup" if you will. The last thing I tried was adjusting the platter height so that it's high enough to avoid hitting anything underneath but not so high that the belt would slip off (which I found can happen), but the problem is still there. Now I'm thinking it's either something with the belt or the motor spindle. Any thoughts?

Re: Odd pitch problem with Beogram 1800

dbxdx5 — Wed, 03 Aug 2011 13:09:40 GMT

Great! I'll check the speed that way and see if it tells me what's going on.

Re: Odd pitch problem with Beogram 1800

Dillen — Wed, 03 Aug 2011 12:48:29 GMT

Along the right edge, close to the front is a pair of holes in the bottom plate.
Place the Beogram so that its right edge is 5-8cm out over a table edge
and you can access the adjustments while it runs.

Martin

Re: Odd pitch problem with Beogram 1800

dbxdx5 — Wed, 03 Aug 2011 12:37:00 GMT

Really? I only saw the adjustments on top. Where are they located underneath?

Re: Odd pitch problem with Beogram 1800

Dillen — Wed, 03 Aug 2011 12:24:50 GMT

The speed trimmers can be accessed from below the Beogram.

Martin

Re: Odd pitch problem with Beogram 1800

dbxdx5 — Fri, 22 Jul 2011 15:17:10 GMT

The Speedstrobe uses a quartz-locked light that doesn't depend on the AC line frequency, so the hertz isn't an issue.

I had checked and adjusted the speed with the chassis plate off (so that I could access the speed adjustments). I'm going to check the speed again with the plate on--maybe it's interacting somehow or something is rubbing against it.

Re: Odd pitch problem with Beogram 1800

ProGram — Wed, 20 Jul 2011 01:08:20 GMT

Usually, the speed must be right, when a strobe disc indicates no drift. But You watched the right hertz marking and used a regular light bulb (not those with electronic transformers etc) then?

Odd pitch problem with Beogram 1800

dbxdx5 — Mon, 18 Jul 2011 16:54:42 GMT

I hope some of the Beogram brains here will have an educated guess for what's causing this problem. . . .

As the subject line says, my friend's Beogram 1800--which I had previously brought back to life with the help of this forum--is playing noticeably off pitch. At first I thought that the platter might be rubbing against the chassis, throwing off the speed. But I adjusted the leaf springs and the problem is still there. Belt seems fine; it was a replacement from Dillen. I also checked and adjusted the speed for both 33 1/3 and 45 using a very accurate strobe disc and light (the Speedstrobe from KAB Electro-acoustics). Any ideas?