Beogram 6500 Scraping Sound when half of the record has played

15 replies

Oh, yes.
All fine then, - as long as you don't fit schottky diodes as rectifiers. I have had four cases now of exploded schottkys in type 59xx decks.
They are no good when used as power rectifiers and I can't for the life of me understand why owners replace conventional diodes with schottkys.

Martin

Regarding re-cap, is is often necessary on these Beograms? If so, are there any recommended brands and their values floating around the forums? Could be good to know for reference if any problems arise.

Would you say that tweaking the RIAA made any noticeable difference? What kind of tweak by the way? :-)

Martin wrote:

Regarding re-cap, is is often necessary on these Beograms? If so, are there any recommended brands and their values floating around the forums? Could be good to know for reference if any problems arise.

Would you say that tweaking the RIAA made any noticeable difference? What kind of tweak by the way? :-)

Apart from the filter capacitor on the power supply board (known to short circuit if of the Roederstein brand), there are not really any common problems with capacitors in these decks. And not a lot of capacitors at all, really.

The sound reproduction of the RIAA preamplifier can be changed slightly by replacing some of the capacitors on the RIAA module, but that'll be a matter of taste rather than a matter of failure.

A better "tweak" (and one that can be proved technically) would be to replace the opamps with better spec'ed ones.
But - again - that will not be because of failure, or even because of frequency response, but mainly because of s/n specs, which rarely any owner would notice anyways.
These Beograms are excellent performers in their own rights, and beautiful design pieces at that, but any serious vinyl afficionado would've chosen a different deck altogether rather than trying to "tweak" something out that never was there.

The best tweak you can do is use a good quality cartridge.
In other words - if your cartridge was less than, say, 350-500 euros or thereabout, your focus should be on that long before any other "tweaks".

Martin

Thanks for giving your input on this! Good to know. It is difficult to know if it would be worthwhile to rebuild the old original MMC2 cartridge. I mean, it works and sounds OK as far as I can tell but who knows how much better it would sound with a fresh suspension and tip? Time will tell... :-)

Thanks Martin,

I had the same scraping problems halfway through a record (the more heavy vinyl kind). I did exactly what you did and turned the three screws on my BeogGram 9500 a quarter turn. This solved the problem!

Gerard

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