Hi all!

I have an old Beogram 1700 which I got sort of working (freeing and oiling the actuator pin etc.). But I have problems with the record size adjustments!

I have tried to adjust the arm drop for the 7 and 12 size records, but cannot get them adjusted far enough: the tonearm drops always before it reaches the record (starting some half cm outside the record's edge). The adjustments vary these point a bit, but not enough. Also, the record stops playing short of the end groove (about the same half cm before it reaches the end grooves). When returning the tonearm also goes a cm or so too far (beyond parallel to the sides). It seems like the whole arm travel is a cm or so "off" ?

Any ideas what could cause this kind of behavior ? Tonearm itself looks straight and otherwise moves smooth and nicely.

-jari

Something mechanically bent or broken inside ?
Is the tonearm parking position apprx parallel to the deck edge ?

Martin

Nothing obviously bent or broken inside.

The parking position is not parallel to the deck edge but it is also "off", i.e. the cartridge is about a cm closer to the edge than pivot end ot the arm.

-jari

I wonder, could this be "corrected"  by bending the thin long rod underneath that rotates the tonearm ? Bending the end of it it so that it is effectively a bit shorter should move all the reference points (parking position, record drop areas, end groove start) closer to platter center.

WIll this work or would I just cause more problems by attempting it ?

-jari

It may very well work but it should only be a very slight bend.

Martin

jrantala:

I wonder, could this be "corrected"  by bending the thin long rod underneath that rotates the tonearm ? Bending the end of it it so that it is effectively a bit shorter should move all the reference points (parking position, record drop areas, end groove start) closer to platter center.

WIll this work or would I just cause more problems by attempting it ?

-jari

If your parking position is to "far" away from the disk, if your 45 and 33 comes down too early and you can't adjust it with the exenters, and if you cant find mecanical wear anywhere in the mec. sequence, the answer is YES.

Start with the adjustment for 45 setdown point (exenter) in middle position, bend the rod until you get setdown more or less correct, then fine adjust the setdown point corretly with the excenter ( 85 Mm. from center), then fine adjust 33 to 147 Mm. from center, the rest pos. should then be nearly paralel to the deck.

Success! Thanks for the encouragement, I bent the rod so that it is now some 1 mm shorter and the adjustments for the 45 and 33 discs are now doable! Also the end groove detection is more or less correct.

So, the bg1700 is working again nicely!

Thanks, -jari