Home |
Search |
Today's Posts |
![]() |
|
Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
![]()
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
![]()
Will Deoxit on a circuit board cause problems? In other words, is it
conductive if it's touching components? I had to spray some switches that had a very tiny hole in a plastic covering, so the Deoxit got all over the board. I removed most of it with tissue paper, but there are traces of it beneath chips and other components, which is difficult to remove. I have also used some Q-tips to get rid of as much as I can, but I cant get all of it. Will it evaporate over time? I wont be plugging this device in for at least 24 hours. Normally it's not this messy, but in this case there was no easy way to get it into those switches, which badly needed to be cleaned. I wish they would not seal switches like this. The old style switches with open ends were so much easier to clean. |
#2
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Tuesday, February 6, 2018 at 2:06:11 PM UTC-8, wrote:
Will Deoxit on a circuit board cause problems? Not according to the manufacturer. Various formulations have been around for decades, with no alarms raised. Relax, plug it in and go. |
#4
![]()
Posted to sci.electronics.basics,sci.electronics.repair
|
|||
|
|||
![]()
On Tue, 06 Feb 2018 16:43:38 -0800, Jeff Liebermann
wrote: On Tue, 06 Feb 2018 16:05:11 -0600, wrote: Will Deoxit on a circuit board cause problems? In other words, is it conductive if it's touching components? Think about it for a moment. If a switch lube were conductive, and you sprayed it on the switch contacts, one might expect the switch lube to short out the switch. That would make it a very bad switch lube. Therefore, one might suspect that NOT shorting out the switch which Deoxit is trying to lubricate might be a formulation requirement. In other words, it better not be conductive. Deoxit is mosly mineral oil (saturated parrafin oil) which will evaporate, but very slowly. You'll need some kind organic solvent to clean off the oil residue from the PCB. If you using Cramolin Red instead of Deoxit, there's some oleic acid in the mix as an oxide remover, which will very slowly corrode copper and must be removed from the PCB. I guess I did not explain that real well. Of course it's not conductive, but what I meant is whether there could be water in it, meaning till it drys it could be conductive via the water. I know most chemicals these days cant contain solvents which are air pollution. In fact a mechanic friend told me that auto paints no longer contain laquer thinner, and some are even water based. Knowing it's mineral oil eliminates that worry. I've never seen that Cramolin Red, but I'll be sure to never buy it. Deoxit seems to be the best anyhow, so I dont buy anything else. Years ago, I used Radio Shacks contact cleaner most of the time, which usually worked ok, but that is no longer available and Deoxit is better anyhow. It's a little on the pricey side, but I find myself using less of it than I used with the sprays I used in the past. Thanks for the help. |
#5
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
wrote:
Will Deoxit on a circuit board cause problems? In other words, is it conductive if it's touching components? I had to spray some switches that had a very tiny hole in a plastic covering, so the Deoxit got all over the board. I removed most of it with tissue paper, but there are traces of it beneath chips and other components, which is difficult to remove. I have also used some Q-tips to get rid of as much as I can, but I cant get all of it. Will it evaporate over time? I wont be plugging this device in for at least 24 hours. Normally it's not this messy, but in this case there was no easy way to get it into those switches, which badly needed to be cleaned. I wish they would not seal switches like this. The old style switches with open ends were so much easier to clean. Main ingredient in common Deoxit is gasoline. Well, Coleman Fuel, well Naphtha. It evaporates slower than some other solvents. The 5% oily solution remains for some time. Flammable but not conductive. Greg |
#6
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
wrote:
On Tue, 06 Feb 2018 16:43:38 -0800, Jeff Liebermann wrote: On Tue, 06 Feb 2018 16:05:11 -0600, wrote: Will Deoxit on a circuit board cause problems? In other words, is it conductive if it's touching components? Think about it for a moment. If a switch lube were conductive, and you sprayed it on the switch contacts, one might expect the switch lube to short out the switch. That would make it a very bad switch lube. Therefore, one might suspect that NOT shorting out the switch which Deoxit is trying to lubricate might be a formulation requirement. In other words, it better not be conductive. Deoxit is mosly mineral oil (saturated parrafin oil) which will evaporate, but very slowly. You'll need some kind organic solvent to clean off the oil residue from the PCB. If you using Cramolin Red instead of Deoxit, there's some oleic acid in the mix as an oxide remover, which will very slowly corrode copper and must be removed from the PCB. I guess I did not explain that real well. Of course it's not conductive, but what I meant is whether there could be water in it, meaning till it drys it could be conductive via the water. I know most chemicals these days cant contain solvents which are air pollution. In fact a mechanic friend told me that auto paints no longer contain laquer thinner, and some are even water based. Some areas or states might have a ban on lacquer. Not popular like once was, but common in touch up spray cans. Enamel spray with hardener is awfull to breath. Knowing it's mineral oil eliminates that worry. I've never seen that Cramolin Red, but I'll be sure to never buy it. Deoxit seems to be the best anyhow, so I dont buy anything else. Years ago, I used Radio Shacks contact cleaner most of the time, which usually worked ok, but that is no longer available and Deoxit is better anyhow. It's a little on the pricey side, but I find myself using less of it than I used with the sprays I used in the past. Thanks for the help. if you want to clear boards, use a plastic safe residue free electronic spray. Greg |
#7
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
OK - DeOxit as a contact cleaner (there are several formula) contains 95% volatile hydrocarbons and propellants if applicable, and 5% proprietary ingredients. These latter may or may not be Oleic acid, but they are reactant with various oxides of common conductive materials such as silver, copper or tin.
As long as all or part of that 5% has not reacted with one or another oxide, it will remain active. The salts produced by its reactions are, emphatically, conductive. DeOxit *MUST* be removed from whatever it goes into in order to prevent down-the-line problems. If used on a pot, the pot should be rinsed in a _lubricating_ cleaner. CRC, amongst others, makes such a material, spray or pump. So, use DeOxit. Allow it to work while exercising the pot (or switch). Rinse & lubricate. Done. Peter Wieck Denver, CO |
#8
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Wed, 7 Feb 2018 09:18:57 -0000 (UTC), gregz
wrote: Main ingredient in common Deoxit is gasoline. Well, Coleman Fuel, well Naphtha. It evaporates slower than some other solvents. The 5% oily solution remains for some time. Flammable but not conductive. Greg Reverse engineering Deoxit is problematic because the formula has changed over the years (starting with Cramoline) and because there are multiple mutations sold under the Deoxit name. There's now a Deoxit grease. Even so, I can assure you that gasoline is not used (it evaporates and you would smell it). The spray type is mostly "mineral spirits" or "naphtha". The "active ingredient" is some kind of acidic oxide remover, such as oleic acid (because it is food safe): http://store.caig.com/s.nl/it.I/id.66/.f "Formulation: 5% DeoxIT® (active ingredient), 75% odorless mineral spirits (carrier solvent), 20% propellant Formulation contains petroleum naphtha (odorless mineral spirits) solvent, and is briefly flammable (until solvent evaporates within 2-3 minutes). It's slower to evaporate, providing flushing action to remove surfaces dirt, grease and other contaminants. Is ideal for connectors and components removed from equipment or those that are easily accessible. It is safe on plastics. When in doubt, always test for compatibility, especially vintage equipment with aging ABS plastic(s)." Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#9
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Wednesday, 7 February 2018 17:29:49 UTC, Jeff Liebermann wrote:
Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. What? If you sprayed it in your ear it would shield you against noise. And when were you last hassled by Robert Fred or Ian? See it does shield you from R,F&I. NT |
#10
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Thu, 8 Feb 2018 15:46:52 -0800 (PST), wrote:
On Wednesday, 7 February 2018 17:29:49 UTC, Jeff Liebermann wrote: Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. What? If you sprayed it in your ear it would shield you against noise. Ummm... It uses a brush or swap applicator (for maximum waste and evaporation) and is not a spray. A Q-tip might be best for swabbing in your ear. Let us know if it reduces the noise level and improves the SNR (signal to noise ratio) in this newsgroup. And when were you last hassled by Robert Fred or Ian? See it does shield you from R,F&I. Cute, clever, and I like that. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#11
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Saturday, 10 February 2018 01:09:54 UTC, Jeff Liebermann wrote:
On Thu, 8 Feb 2018 15:46:52 -0800 (PST), tabbypurr wrote: On Wednesday, 7 February 2018 17:29:49 UTC, Jeff Liebermann wrote: Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. What? If you sprayed it in your ear it would shield you against noise. Ummm... It uses a brush or swap applicator (for maximum waste and evaporation) and is not a spray. A Q-tip might be best for swabbing in your ear. Let us know if it reduces the noise level and improves the SNR (signal to noise ratio) in this newsgroup. Well I'm not an earologist, but I presumed more would get on the eardrum if it were sprayed in, hence the suggestion of sorts. And if some does, it's bound to reduce noise, to some degree. NT And when were you last hassled by Robert Fred or Ian? See it does shield you from R,F&I. Cute, clever, and I like that. |
#12
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
Quick fix (Pat. Pend.):
a) Obtain one small container of low-grade, but pure Olive Oil. b) Obtain a small container of Zippo lighter fluid (made in Bradford, PA). c) Obtain a small package of cotton swabs. In a small dish, mix nineteen (19) drops of lighter fluid with one (1) drop of olive oil. Saturate the end of one cotton swab in the material. Stick it in your ear! Peter Wieck Melrose Park, PA |
#13
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Sat, 10 Feb 2018 17:44:33 -0800 (PST), wrote:
On Saturday, 10 February 2018 01:09:54 UTC, Jeff Liebermann wrote: On Thu, 8 Feb 2018 15:46:52 -0800 (PST), tabbypurr wrote: On Wednesday, 7 February 2018 17:29:49 UTC, Jeff Liebermann wrote: Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. What? If you sprayed it in your ear it would shield you against noise. Ummm... It uses a brush or swap applicator (for maximum waste and evaporation) and is not a spray. A Q-tip might be best for swabbing in your ear. Let us know if it reduces the noise level and improves the SNR (signal to noise ratio) in this newsgroup. Well I'm not an earologist, That would be an otolaryngologist: https://en.wikipedia.org/wiki/Otorhinolaryngology Please add the word to your grammar, vocabulary, and spelling chequer. but I presumed more would get on the eardrum if it were sprayed in, hence the suggestion of sorts. And if some does, it's bound to reduce noise, to some degree. It might reduce the high end frequency response of the ear drum, but the sensitivity to audible noise would likely be worse. Water, oil, and presumably Deoxit are incompressible and thus transmitting sounds and noise better than through compressible air. That's why we can hear when submerged in water. Besides, I don't think the ultra expensive Deoxit Pro GX3 is currently available in spray form. Since every drop is valueable, a proper dispenser would be a blunt needle tip bottle, not a brush or swab, and certainly not a wasteful spray. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#14
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Sunday, 11 February 2018 18:02:45 UTC, Jeff Liebermann wrote:
On Sat, 10 Feb 2018 17:44:33 -0800 (PST), tabbypurr wrote: On Saturday, 10 February 2018 01:09:54 UTC, Jeff Liebermann wrote: On Thu, 8 Feb 2018 15:46:52 -0800 (PST), tabbypurr wrote: On Wednesday, 7 February 2018 17:29:49 UTC, Jeff Liebermann wrote: Note the $150 for 7.4ml price tag for Deoxit Gold Pro GX3. http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" Ummm... right. What? If you sprayed it in your ear it would shield you against noise. Ummm... It uses a brush or swap applicator (for maximum waste and evaporation) and is not a spray. A Q-tip might be best for swabbing in your ear. Let us know if it reduces the noise level and improves the SNR (signal to noise ratio) in this newsgroup. Well I'm not an earologist, That would be an otolaryngologist: https://en.wikipedia.org/wiki/Otorhinolaryngology Please add the word to your grammar, vocabulary, and spelling chequer. but I presumed more would get on the eardrum if it were sprayed in, hence the suggestion of sorts. And if some does, it's bound to reduce noise, to some degree. It might reduce the high end frequency response of the ear drum, but the sensitivity to audible noise would likely be worse. Water, oil, and presumably Deoxit are incompressible and thus transmitting sounds and noise better than through compressible air. That's why we can hear when submerged in water. Besides, I don't think the ultra expensive Deoxit Pro GX3 is currently available in spray form. Since every drop is valueable, a proper dispenser would be a blunt needle tip bottle, not a brush or swab, and certainly not a wasteful spray. Otology, otorhinolaryngology, otolaryngology, ENT, etc. Please explain how I can add a word that's in my vocabulary to my vocabulary, I can't find that command. I'm running Life 1.0. Anyone that's been underwater can tell you they hear less. It's obvious enough, since water has way more density than air. NT |
#15
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Mon, 12 Feb 2018 09:31:12 -0800 (PST), wrote:
Otology, otorhinolaryngology, otolaryngology, ENT, etc. Please explain how I can add a word that's in my vocabulary to my vocabulary, I can't find that command. I'm running Life 1.0. I don't think it's my place to teach you how to learn, but the general procedure is quite simple. Open book, insert face, learn a few new words, use them as much a possible, and hopefully some of them might stick. Writing or typing these new additions to your vocabulary also enhances retention and improves spelling. Anyone that's been underwater can tell you they hear less. It's obvious enough, since water has way more density than air. NT I believe that I mentioned that underwater hearing attenuates the high frequency sounds, while still passing most of the low frequency sounds. Moving the eardrum against a mass of water on one side requires more energy. Moving the eardrum slower, at lower frequencies, requires less energy, so some of that is preserved. Either way, spraying Deoxit in your ear isn't going to do anything useful, except maybe loosen some ear wax. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#16
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Mon, 12 Feb 2018 09:49:58 -0800, Jeff Liebermann
wrote: I don't think it's my place to teach you how to learn, but the general procedure is quite simple. Open book, insert face, You forgot to mention "OPEN YOUR EYES"....... ![]() learn a few new words, use them as much a possible, and hopefully some of them might stick. Writing or typing these new additions to your vocabulary also enhances retention and improves spelling. |
#17
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
There are approximately 228,000 words in the English Language excluding compounds, jargon, plurals, etc..
Add in all of the above, and that number jumps to just under 1,000,000. Of the first number, the average American native English speaker has a working vocabulary of about 5,000 words speaking, and about twice that written. https://www.oxfordonlineenglish.com/...est/vocabulary Test yourself (the link is one of many) and let us know. Writing for myself, I grew up with over 5,000 books and no television in the house. I typically max out on these test with a working vocabulary of over 80,000 words undifferentiated between spoken and written. This is not even a little bit a matter of intelligence, simply a matter of early, continued and repeated exposure. I still read, on average, three books per week, in a mix of about 40% mystery (Martha Grimes, Louise Penny), 20% Thriller (Lee Child, Steven King, Dean Koontz) and the rest historical (David McCullough and such). Words are fascinating. At the same time, both tools and weapons. Peter Wieck Melrose Park, PA |
#18
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Mon, 12 Feb 2018 12:05:33 -0800 (PST), "
wrote: Of the first number, the average American native English speaker has a working vocabulary of about 5,000 words speaking, and about twice that written. You wont find that on ebay much of the time. Particularly if the item is in California. Apparenely there are a lot of foreign speaking persons selling on ebay, in CA. who only know ten words in English. Just recently I asked a CA ebay seller about a part for my car. I gave a detailed description of what I needed, and asked if they would tell me the correct part, if that was the wrong one. (There were 4 possibilities). The reply I got (3 days later) was: * So sorry it is not fit. * I bet that used up half of his English vocabulary..... And did not help me get the correct part. I ordered from a different seller, which cost $2 more, I phoned and that seller was able and willing to help me get the perfect part and could speak english well, and was friendly to boot. Good service means a lot to me, and I'll pay a little more to get it. I'd hate to think what would happen if I got the wrong, or a defective part from that guy who cant speak english... Actually I have had that happen with a few other items, and it became a real hassle... |
#19
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Monday, February 12, 2018 at 3:41:41 PM UTC-5, wrote:
On Mon, 12 Feb 2018 12:05:33 -0800 (PST), " wrote: Of the first number, the average American native English speaker has a working vocabulary of about 5,000 words speaking, and about twice that written. The saddest part, and I did not go too deeply into it, is that non-American native English speakers tend to have a spoken vocabulary of approximately 12,000 words and a written vocabulary of approximately 42,000 words. ESL speakers tend to learn 2.5 words per day, for approximately five years after starting to learn English. And they 'start' with roughly 1,000 words. Meaning that they are as good or better (discounting an accent) than the average American in that five years. Education in this country is abysmal at the elementary and high-school level. And we are paying the price. Peter Wieck Melrose Park, PA |
#20
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]() |
#21
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Monday, 12 February 2018 17:50:04 UTC, Jeff Liebermann wrote:
On Mon, 12 Feb 2018 09:31:12 -0800 (PST), tabbypurr wrote: Otology, otorhinolaryngology, otolaryngology, ENT, etc. Please explain how I can add a word that's in my vocabulary to my vocabulary, I can't find that command. I'm running Life 1.0. I don't think it's my place to teach you how to learn, but the general procedure is quite simple. Open book, insert face, learn a few new words, use them as much a possible, and hopefully some of them might stick. Writing or typing these new additions to your vocabulary also enhances retention and improves spelling. you've failed to answer the question. You told me to I learn something I already know. How? Anyone that's been underwater can tell you they hear less. It's obvious enough, since water has way more density than air. NT I believe that I mentioned that underwater hearing attenuates the high frequency sounds, while still passing most of the low frequency sounds. Moving the eardrum against a mass of water on one side requires more energy. Moving the eardrum slower, at lower frequencies, requires less energy, so some of that is preserved. Either way, spraying Deoxit in your ear isn't going to do anything useful, except maybe loosen some ear wax. No-one ever said it would be useful, just that it would reduce noise. And it does a bit. NT |
#22
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Mon, 12 Feb 2018 17:23:02 -0800 (PST), wrote:
you've failed to answer the question. You told me to I learn something I already know. How? Think of it as a refresh cycle, as in dynamic RAM. If you don't use a word, we tend to forget it. It should help you recall the correct term, ummm... whatever it was, for an eye, ear, nose, and throat doctor. No-one ever said it would be useful, just that it would reduce noise. And it does a bit. I believer you may have misread the data sheet: http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" By implication and due to general lack of specifics and details, methinks they are referring to RF noise, not audible acoustic noise. If Deoxit really did reduce RF noise and RF interference, then it would need to apply some kind of barrier. There are two general types, absorptive and reflective. Unfortunately the data sheet also mentions: "Improves Conductivity" which could be either absorptive or reflective, because human skin is mildly conductive. Without further detail from Deoxit, I can't offer a mechanism for how it might function to reduce RF noise and RF interference. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#23
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Tuesday, 13 February 2018 16:53:26 UTC, Jeff Liebermann wrote:
On Mon, 12 Feb 2018 17:23:02 -0800 (PST), tabbypurr wrote: you've failed to answer the question. You told me to I learn something I already know. How? Think of it as a refresh cycle, as in dynamic RAM. If you don't use a word, we tend to forget it. It should help you recall the correct term, ummm... whatever it was, for an eye, ear, nose, and throat doctor. you seem determined to miss the point and engage in a silly ****ing contest.. No matter. No-one ever said it would be useful, just that it would reduce noise. And it does a bit. I believer you may have misread the data sheet: http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" no, I didn't misread it By implication and due to general lack of specifics and details, methinks they are referring to RF noise, not audible acoustic noise. Of course that is not implied, it is inferred by you. I would think it evident that the only possible credible claim re noise reduction is that it may reduce noise caused by oxidised contacts. That it might reduce other forms of noise in real world electronic circuits seems wholly unrealistic. I would therefore think it somewhat obvious that I was being facetious when discussing it's sonic noise reduction properties, which technically it does have, even if they bear no connection to its real world intended use. My apology for thinking all that obvious. NT |
#24
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Tue, 13 Feb 2018 09:18:54 -0800 (PST), wrote:
On Tuesday, 13 February 2018 16:53:26 UTC, Jeff Liebermann wrote: On Mon, 12 Feb 2018 17:23:02 -0800 (PST), tabbypurr wrote: you've failed to answer the question. You told me to I learn something I already know. How? Think of it as a refresh cycle, as in dynamic RAM. If you don't use a word, we tend to forget it. It should help you recall the correct term, ummm... whatever it was, for an eye, ear, nose, and throat doctor. you seem determined to miss the point and engage in a silly ****ing contest. No matter. Guilty as charged. If needed, I can supply a signed confession for a nominal charge. However, simply because I'm not providing the reply which you are expecting does not make this a ****ing contest. No-one ever said it would be useful, just that it would reduce noise. And it does a bit. I believer you may have misread the data sheet: http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" no, I didn't misread it If you insist. Perhaps you misinterpreted it? By implication and due to general lack of specifics and details, methinks they are referring to RF noise, not audible acoustic noise. Of course that is not implied, it is inferred by you. Correct. The author of the data sheet implied it and I inferred it. Using "noise" and "RFI" in the same sentence suggests that they might be connected in some way. Since audio was not specifically mentioned while interference was mentioned, perhaps they both involve RF? Either way, you cannot assume that the particular form of noise mentioned in the data sheet is audible or that Dexoit can be expected to function under water or in the ear. I would think it evident that the only possible credible claim re noise reduction is that it may reduce noise caused by oxidised contacts. That it might reduce other forms of noise in real world electronic circuits seems wholly unrealistic. Nothing is evident until demonstrated, proven, and tested. A simple test for this are numbers, the lack of which suggest that such performance claims are far from evident or obvious. In this case, the noise reduction should be specified and measured in dB decrease in accordance to a repeatable testing procedure. What Deoxit might do in a real world or under non-specific conditions is of no concern. It might be possible to contrive such a test and associated measurement at audio levels, but the mention of RFI in the same sentence suggests that it is an RF noise level, which would be more difficult to demonstrate and measure. Unfortunately, the picture in the data sheet is that of the rear of an audio amplifier, which suggests an audio test. Therefore, unless additional clarification arrives from Caig Labs, such a test cannot be performed. I'll leave it an open question while awaiting clarification and possibly test results. I would therefore think it somewhat obvious that I was being facetious when discussing it's sonic noise reduction properties, which technically it does have, even if they bear no connection to its real world intended use. My apology for thinking all that obvious. The only thing that is obvious here is that you are frustrated by my unwillingness to accept your observations, deductions, and conclusions at face value. You have failed to see the value in refreshing your vocabulary. You have failed to distinguish between acoustic and RF noise. You have failed to recognize that miraculous performance claims by overpriced solvents must be tested, measured, and proven. You have failed to recognize that all things that are obvious, beyond any need of verification, are invariably wrong. You have also failed to agree with anything I have offered, which is prima facie evidence that you are most likely in error. You even failed by thinking that all things are obvious. With such a dismal success rate, there is little hope of recovery. I'll accept your apology for trying to think the obvious and leave it at that. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#25
![]()
Posted to sci.electronics.repair
|
|||
|
|||
![]()
On Tuesday, 13 February 2018 18:08:10 UTC, Jeff Liebermann wrote:
On Tue, 13 Feb 2018 09:18:54 -0800 (PST), tabbypurr wrote: On Tuesday, 13 February 2018 16:53:26 UTC, Jeff Liebermann wrote: On Mon, 12 Feb 2018 17:23:02 -0800 (PST), tabbypurr wrote: you've failed to answer the question. You told me to I learn something I already know. How? Think of it as a refresh cycle, as in dynamic RAM. If you don't use a word, we tend to forget it. It should help you recall the correct term, ummm... whatever it was, for an eye, ear, nose, and throat doctor. you seem determined to miss the point and engage in a silly ****ing contest. No matter. Guilty as charged. If needed, I can supply a signed confession for a nominal charge. However, simply because I'm not providing the reply which you are expecting does not make this a ****ing contest. No-one ever said it would be useful, just that it would reduce noise. And it does a bit. I believer you may have misread the data sheet: http://store.caig.com/s.nl/it.A/id.2847/.f "Shields Against Noise and RFI" no, I didn't misread it If you insist. Perhaps you misinterpreted it? By implication and due to general lack of specifics and details, methinks they are referring to RF noise, not audible acoustic noise. Of course that is not implied, it is inferred by you. Correct. The author of the data sheet implied it and I inferred it. Using "noise" and "RFI" in the same sentence suggests that they might be connected in some way. Since audio was not specifically mentioned while interference was mentioned, perhaps they both involve RF? Either way, you cannot assume that the particular form of noise mentioned in the data sheet is audible or that Dexoit can be expected to function under water or in the ear. I would think it evident that the only possible credible claim re noise reduction is that it may reduce noise caused by oxidised contacts. That it might reduce other forms of noise in real world electronic circuits seems wholly unrealistic. Nothing is evident until demonstrated, proven, and tested. A simple test for this are numbers, the lack of which suggest that such performance claims are far from evident or obvious. In this case, the noise reduction should be specified and measured in dB decrease in accordance to a repeatable testing procedure. What Deoxit might do in a real world or under non-specific conditions is of no concern. It might be possible to contrive such a test and associated measurement at audio levels, but the mention of RFI in the same sentence suggests that it is an RF noise level, which would be more difficult to demonstrate and measure. Unfortunately, the picture in the data sheet is that of the rear of an audio amplifier, which suggests an audio test. Therefore, unless additional clarification arrives from Caig Labs, such a test cannot be performed. I'll leave it an open question while awaiting clarification and possibly test results. I would therefore think it somewhat obvious that I was being facetious when discussing it's sonic noise reduction properties, which technically it does have, even if they bear no connection to its real world intended use. My apology for thinking all that obvious. The only thing that is obvious here is that you are frustrated by my unwillingness to accept your observations, deductions, and conclusions at face value. I just see no value in them You have failed to see the value in refreshing your vocabulary. wrong, yet again You have failed to distinguish between acoustic and RF noise. wrong & silly You have failed to recognize that miraculous performance claims by overpriced solvents must be tested, measured, and proven. wrong & silly You have failed to recognize that all things that are obvious, beyond any need of verification, are invariably wrong. wrong & silly You have also failed to agree with anything I have offered, which is prima facie evidence that you are most likely in error. wrong & silly You even failed by thinking that all things are obvious. wrong & silly With such a dismal success rate, there is little hope of recovery. I'll accept your apology for trying to think the obvious and leave it at that. just silly. I won't spend any more time on your weirdness today. NT |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Deoxit vs. RS tuner cleaner? | Home Repair | |||
Can I use Deoxit D5 to clean 37 yr old silicone loaded controls? | Electronics Repair | |||
could alkaline battery leak onto circuit board cause problems ? | Electronics Repair | |||
Deoxit | Electronics Repair | |||
better - DEOXIT, RIDOX, SUPER CONTACT CLEANER, WD40 or.. | Electronics Repair |