What to do with a TT2?

[DSJR]

As long as the suspension allows the sub-chassis some lateral movement in all planes as well as traditional "bounce" (Can't remember how truly piston-like the TT2 is, but the TD125 had some difficulty as does the Gyrodeck I remember), you should be ok.

Shane should confirm, but when tightening the P-clips, it's common for the edges of the cable to be crushed, leaving the center of the cables not fully gripped. With the fig-8 Linn cables this was an issue, but obviously, the fancy cables often used with the Jelco 750 may well be a heck of a lot easier to manage and dress..

[shane]

Agreed. The cables Linn used were a nightmare for any suspended turntable. If you dress the cable as shown, then the portion that flexes when the chassis moves is straight and interferes less with the movement of the chassis.

[AlfaGTV]

I was curious about the recommended height of the platter as the 5mm the manual insist on, seems a little bit high imo.
I have used those 5mm as a point of reference though.

Another issue is that i cant seem to find any references to the correct angle of he motor, when using the external motorcontrol. The belt has tendency to wander about as they spin. I think this is a similar construction to Linn's and would like some furter info on how toadjust this?

Regards Mike

[DSJR]

In my experience, the belt should be smooth with no grease or dirt on its surfaces. Rega belts have flashing on from the moulding process and can take an age for this to wear off and the belt to start "rolling" as it runs. It sorts itself out after a few tens of hours and modern Regas have fixed motors in any case..

As to the TT2, I'd suggest cleaning the belt and all driving/driven surfaces with a cleaner (I've used RS switch cleaning solvent but cannot recommend this universally as it may react with the belt compounds). Turn the top platter upside down and after fitting the belt, place the top platter thus. Switch on and watch the belt run. It'll weave up and down until the speed is stable and then should run roughly in the middle of the pulley. I seem to remember the motor can be slightly tilted to get the belt to run correctly, but if it won't, it must be replaced - suppliers of replacement belts?

[shane]

Your turntable is between twenty five and thirty years old, so it would almost certainly benefit from a new belt. Guy at Puresound has the remaining stock of TT2 spares, including belts, so I'd drop him a PM.

Once you've got the new belt, then as Dave says, the motor plate can be adjusted to get the belt running centrally on the pulley. Make sure the running surfaces of the pulley and sub-platter are clean and free of any rubber residues from the old belt first, then turn the platter upside down, let the motor run for a few minutes to let everything settle down and then look to see where the belt is running on the motor pulley. If the belt the runs high on the pulley, loosen the two front socket head screws on the motor plate by half a turn, then screw down the two grub screws by the same amount to lift the front edge of the motor plate. If it's running low, then undo the two grubscrews by half a turn, then tighten down the two socket head screws by the same amount. Repeat if necessary.

All of this is detailed in the handbook, which can be downloaded from http://www.vinylengine.com/library/heybrook/tt2.shtml if you haven't already got one.

[AlfaGTV]

Thanks guys!
It does have a brand new original belt from Pure Sound!
And i have read the manual, but that did not mention the "straight" pulley which is mounted on the TT2's with the TPS external motor control. It does refer to the double speed pulley on my older TT2. However, the older pulley has got a ridge on each of the sections that more or less automatically centers the belt.

So, info on whether to lower the front of the motor when the belt was riding low was exactly what was missing in the manual!
Then i suppose the aim is to have the belt riding in the middle of the flat portion of the pulley?

Thanks again!/Mike

[shane]

Sorry Mike, I didn't twig that yours is the TPS version. I've never had a chance to look at one of those so I don't know what the pulley looks like, but if it has the same arrangement of bolts and grubscrews on the front edge of the motor plate, the principle is the same.

Any chance of a close-up photo of the pulley and motor board?

[AlfaGTV]

Absolutely! Sadly it wont be until tomorrow night, but i'll show you with pictures instead!

Regards /Mike

[pure sound]

The TPS pulley did just have a single crown as the speed change was effected electronically by adjusting the frequency of the supply to the motor. However a manual speed deck that had been subsequently upgraded by the addition of a TPS might still have the original double crowned pulley in which case I'd assume the smaller crown will be used all of the time and should be the same diameter as the TPS pulley given that the TPS also produces 50 Hz for its 33.33 rpm drive.

[DSJR]

May I add that the belt must NOT rub on the pulley shoulders, but as centrally as possible.