Recent content by Thomas_A

Yes I would. Cleaning manually is an option but not really my cup of tea.

I regularly only clean my used records; but this have made me think a bit. I am re-reading old threads at VE with Luckydog's wet play experiments. I don't think it was solved but a there is a hypothesis that the low f reduction is connected to lower friction...

I was wondering since the ≈1 dB channel imbalance shifted.

The odd thing is that the effect is mostly in the LF region and that is a new pressing. An old dirty record is another thing. Broad-band pops could increase noise, but then it should show up in "all" frequencies. The first record tested with the whole track shows the same below 20 Hz (see below...

Hm were the channels swapped?

I did a third experiment of a new vinyl record. Before and after my wash cycle of the HG. This one was a coloured vinyl that was slightly warped. Again there was some reduction of the low frequencies but virtually no effect on frequency response of the music. The silent parts showed basically...

The second copy of sweeps are more in the middle. Not last tracks.

My older JICO SAS/B also lacked damping so I added it. However the latest ones I boughr for my Shure V15Vx and V15V bodies both had damping working exactly as the original. Peaking is there but it can easily be tamed with R at 30-40 kOhm. But the lift can be a comprolise - the middle CA-TRS1007...

Clicks and pops can induce broadband increases but the strange thing is that the cleaned one had a click. It is possible though that this one was high frequency and that the unwashed copy has some low level pops/noise that incease noise. Like friction decreaed a bit after cleaning. I think these...

The 2-sigma is hidden by spectrum?

So here is another test of a new record with classic music. It was first recorded with just cleaning with a carbon fiber brush and the second recording directly after an US with the HumminGuru. Conclusion from the below is that there is really nothing conclusive but small alterations can be...

This ≈60 Hz noise mainly in one channel is still a bit strange, that disappeared after cleaning. Have not been able to trace it yet. It resembles this in a way... https://www.audiosciencereview.com/forum/index.php?threads/moerch-dp8-mini-review.55923/ Hmm...

Recent measurements showed no change in frequency response when testing US on a new record. Used records however usually ends up with more clarity especially in the highs. But the effect is variable depending on how much grit and particles that are stuck. So I would not worry about the surfactant.

Thanks. I'm quite a novice with command line though Terminal but I can at least try see if I get Wine going. It's an old mac with Catalina, so I am hesitant it will work.

Just a question, would this thread be better placed in the turntable, cartridge etc forum?