Thumbs up for ultrasonic record cleaning

Wow, thanks guys. 
@slaw  No issues with treble for those longer/warmer sessions?  
@whart   Yeah, I do have a few more valuable records that are very noisy and would love to spend the time to clean them up if it's even possible.  One that I really treasure is an RL/ss (both sides) Led Zeppelin II pressing.  I just don't know how much is groove damage/scratches vs. dirt.  As long as I'm not damaging the record, I don't mind wasting time on it experimenting.

@audiom3,

I haven’t noticed any problems at all. In fact I notice the opposite effect, in this sense... the fact that the lp is cleaner, the stylus can retrieve more info and I mostly notice an increase in transparency, inner detail, w/ better defined/more musical bass. I’ve done 30 minutes/45C for almost as long as I’ve had the cleaner. I have done up to 50 minutes (this is the max recommended time for my cleaner) one time for a extremely nasty gift lp that ended up better than before.

I once left a new lp on a 30min./45C cycle and forgot to turn on the Vinyl Stack. I put it through another cycle and played it. I could not hear any hint of damage.

@slaw  Thank you for that!  I feel a lot better now.  I was worried some of the early experiments might have been softened a bit from higher/longer temps.  But once records are US cleaned, the differences between warm and bright recordings are even more substantial.

What @slaw said. Except I use 5 minutes per rotation. I even did the same experiment.

audiom3

once records are US cleaned, the differences between warm and bright recordings are even more substantial.

Agreed! If you really want to hear what's on your LPs, there's no substitute for US cleaning, imo.