ljgerens
Responses from ljgerens
| The "Very Best Record Cleaning Formulation" lewm posted "Have you identified molecules that elute with IPA? In this regard, is ethanol safer? Thx." @lewm The main additives diffusing to the surface with concentrated alcohols were identified as plasticizers as well as some stabilizers, scav... | |
| The "Very Best Record Cleaning Formulation" @lewm I can’t put a specific number on dilute alcohol solutions but I would think that anything below 25% and exposed for a few minutes should not be a concern. The migration of additives from the bulk to the surface is a common phenomenon in pol... | |
| The "Very Best Record Cleaning Formulation" @lewm Regarding isopropyl alcohol causing damage to vinyl records. My experiments using several surface sensitive analytical techniques have shown that neither isopropanol or ethanol will cause any damage to a vinyl record surface if used in dilut... | |
| The "Very Best Record Cleaning Formulation" I just came upon this thread so I figured I would provide my experience with ultrasonic cleaning of vinyl records. I studied the effect of ultrasonic cleaning of vinyl records back in the late 70s when I built my first ultrasonic record cleaner. ... | |
| Investigating if ultrasound is harming LPs @iopscrl I agree with your findings regarding US cleaning. I believe that your actual time for your LPs exposed to the bath is ~5 min. Typically the bath solution is below the LP label so only about 1/3 of the LP is in the bath at any given time... | |
| Investigating if ultrasound is harming LPs Ok, maybe I should have been more detailed regarding the experiments I did back in the day to determine if US cleaning would cause damage to LPs. I certainly was concerned with this and why I did the experiments on sacrificial LPs before I actuall... | |
| Investigating if ultrasound is harming LPs @lewm, The experiment you suggest is interesting but as I have observed and others every LP that I have cleaned with an US cleaner sounds better after cleaning. The majority of my LPs were purchased new and US cleaning improved the SQ on all of th... | |
| Investigating if ultrasound is harming LPs I actually studied the effect of ultrasonic cleaning of LPs in great detail back in the late 70s when I built my first ultrasonic cleaner. I used a combination of optical microscopy (Olympus Laboratory Microscope at about 10,000X) and Photoelectro... | |
| Brass versus copper binding posts @ditusa, Ok, I should have stated that a silver coating will prevent the underlying copper from corroding, but silver itself corrodes. The company you quoted does say they apply an enamel coating over the silver, which would prevent corrosion. I... | |
| Brass versus copper binding posts @ditusa, Silver does not prevent corrosion. In fact the silver surface is fairly reactive and can corrode fairly rapidly depending on the number of silver atoms on the surface that are not fully coordinated. Unlike copper which oxidizes to the +1... | |
| which is a better speaker Mike, you might want to ask your question on Audiokarma. There are a lot of folks there who have experience with your receiver and both speakers. I will agree with other posters who stated that your receiver should probably be refurbished. | |
| Corrosion @koestner Is ljgerens really Walter White? No, but I have been known to go by the pseudonym Heisenberg. | |
| Corrosion The green color is not an oxide of Cu. There are 2 oxides of Cu, Cu2O and CuO. CuO is black and Cu2O is a reddish brown color. Copper sulfate (CuSO4) typically does not form on audio cables. It needs the presence of sulfuric acid and an aqueous e... | |
| Anyone here using vintage speakers? In my office system I have KEF Calindas purchased new in 1979. I have Kef Reference 104/2s in my main system. Purchased them about 4 years ago from the original owner in perfect condition. The manufacture date is 1991. | |
| What's the best plating material for interconnects plugs ? I was not trying to change your mind.I was only trying to point out the inaccuracies in some posts regarding the surface and interracial chemistry and electronic properties of silver and its corrosion products. |