wouldn't that be the rubber pulley is slipping ? (You said spring is loose) If pulley doesn't grip it takes time for platter to reach proper speed.Will have to see if cleaning does the trick first cos it takes quite a while to come up to speed at 33.
This spring is quite stretched hence my suspicion that its not letting the idler establish proper contact. At 45 and 78 however the idler touches the pulley perfectly, cos those steps are bigger in diameter. These two speeds come up to speed faster.
Regards
what Jean nantais has done for the lenco is to replace the Spring with a String with a 50-80g weight tied to it. Its more permanent than the rubberband..also the weight can control the degree of the "coupling"
Stevie if you are throwing the old spring away, you can try this...
just clip tiny portion (Half a circle of the spring) of the spring with cutting plier. This will increase tension of the original spring. But please be careful as you will have only one chance. Other than that you can recompress the spring by keeping it compressed for some time. I see from net that spring attaches to a lever with two holes to adjust the tension but I think you already may have thought about it.
Regards
Stevie if you are throwing the old spring away, you can try this...
just clip tiny portion (Half a circle of the spring) of the spring with cutting plier. This will increase tension of the original spring. But please be careful as you will have only one chance. Other than that you can recompress the spring by keeping it compressed for some time. I see from net that spring attaches to a lever with two holes to adjust the tension but I think you already may have thought about it.
Regards