Inner groove "Rumble"

Lewm ..... all there... please click on my system.
Nick ..... I cleaned the stylus, but no improvement. For years, I've been cleaning the stylus after every listening session.
Marakanetz ..... as Pops says, why would the phono stage only cause a problem with the inner grooves ?
Pops ..... I just don't understand why a "stylus or tonearm problem" would happen all of a sudden like this.

Hi Pops.. First of all ... Thanks a lot for your compliment on my system.
No, I do not have another cartridge. The Exact 2 and RB-301 were bought together with the table. But I will follow your suggestion and try to adjust the anti-skate a bit. I'll keep you posted as to what happens.

Hi Lewm.....
As you requested up above, you can easily see my analog front end by clicking my system link. So, with all due respect, instead of telling us how Marakanetz's premise is flawed, can you please offer me some constructive advice as to what you may think about the problem I'm having. I would really appreciate your expertise. Thanks a lot.

To all who have replied with good ideas ---- Lewm, Stringreen, Halcro, Pops, Marakanetz, and Nick --- Thanks a lot for your advice. I'm going to spend some "quality time" with my table and try out what you guys are telling me. I appreciate all your help, and I will post what's happening as I proceed. This is a great example of why I enjoy being a part of the Audiogon community ! Happy Listening to all !

It's definitely not a "hum." The interference is a very irregular "staccato-like" popping type of rumble, which is now starting to bother me even at the outer grooves of a record. I removed and replaced the belt, moved the sub-platter up and down a few times within the bearing, checked the cartridge wire leads, checked the anti-skate, removed - cleaned - re-plugged the phono interconnects, ...... and still the problem continues, now anywhere along an LP's surface. Oy Vey !!

Yes ...... low frequency.

Thanks Heyraz ..... but Rega tables do not have a ground wire.

Hey Guys........
No ..... I have not lost interest in this forum. Sometimes "life gets in the way" and Audiogon takes a back seat to other things. The bearing seems fine, and I think I've narrowed it down to a cartridge problem. I'm going to try to borrow a similar Rega cartridge and mount it to see if that improves the situation. Thanks for all your help and thoughtful advice ! I really appreciate all the interest you guys have shown, and it certainly is a pleasure being part of this fine Audiogon community ! I will keep you all posted as things progress. But, as summer approaches.... a lot more time with golf, bike riding, hiking with my dog, and all kinds of outdoors stuff ..... and a lot less time sitting in my basement music room !

Good one Pops !