Use it or lose it.
The math I could do in college eludes me now days as my job does not require it and I let it slide.
Your vision will start to go around age 49. Simple fact of life. Accomidation (the ability of the iris to contract and expand) goes and you will need glasses.
I got by with cheap wal-mart reading glasses up until llast year when I finally broke down and got prescrpition glasses. I still use reading glasses occasionally.
The stereoscope is a must for small items, I can do 0402s but have not had to try 0204s yet.
I prefer THT parts and point to point wiriing, probably because it is easier to do.
Keeping your mind challanged is probably the greatest thing you can do to keep your facilities.
Second would be taking care of your body, good nutritioin, exercise etc.
Beyond that life is a crap shoot. Genetics and environmental factors you have no control of.
I'm 63, and I feel that for me 85 is probably a reasonable tartget for me to put down my soldering iron.
Worst thing you can do in my opinion, is smoke. I watched my father deteriorate for 10 years before he passed. Smoking robbed him of oxygen capacity. 15% lung capacity allowed him to set in a chair and do very little. People worry about lung cancer, but it is a minor result from smoking compared to enphysema.
The math I could do in college eludes me now days as my job does not require it and I let it slide.
Your vision will start to go around age 49. Simple fact of life. Accomidation (the ability of the iris to contract and expand) goes and you will need glasses.
I got by with cheap wal-mart reading glasses up until llast year when I finally broke down and got prescrpition glasses. I still use reading glasses occasionally.
The stereoscope is a must for small items, I can do 0402s but have not had to try 0204s yet.
I prefer THT parts and point to point wiriing, probably because it is easier to do.
Keeping your mind challanged is probably the greatest thing you can do to keep your facilities.
Second would be taking care of your body, good nutritioin, exercise etc.
Beyond that life is a crap shoot. Genetics and environmental factors you have no control of.
I'm 63, and I feel that for me 85 is probably a reasonable tartget for me to put down my soldering iron.
Worst thing you can do in my opinion, is smoke. I watched my father deteriorate for 10 years before he passed. Smoking robbed him of oxygen capacity. 15% lung capacity allowed him to set in a chair and do very little. People worry about lung cancer, but it is a minor result from smoking compared to enphysema.
Where you are now...
so once was I
Where I am now,
so shall you be
At 52 my eyes have no trouble seeing the smallest of the small, I can see the printed text on SMD devices perfectly. Its anything more than a few inches away that I need glasses for.
Ballpencil - the greybeard repair technicians can fill in the precise details, but IINM, that buzz was from CRT's flyback transformers, in the approx 15K territory - which none of the last decade's or so video displays / TVs will include.
So not hearing them doesn't necessarily indicate HFS hearing loss, but don't worry, chronic tinnitus will compensate for lack of cochlear input - except that it doesn't turn off.
That, presbyopia, degenerative lumbar disc disease and compressed sciatic nerve can certainly take some of the fun out of building and listening to audio gear, so you learn to relish every drop of life even more.
Remember the glass is always full - it's just that the air part is usually invisible
So not hearing them doesn't necessarily indicate HFS hearing loss, but don't worry, chronic tinnitus will compensate for lack of cochlear input - except that it doesn't turn off.
That, presbyopia, degenerative lumbar disc disease and compressed sciatic nerve can certainly take some of the fun out of building and listening to audio gear, so you learn to relish every drop of life even more.
Remember the glass is always full - it's just that the air part is usually invisible
Yep, line whistle at 15625Hz (in the UK, lines multiplied by frame rate) was very audible back in the day. There were that many harmonics flying around that many so called line whistle problems were more likely half that value. Modern SMPS tend to whisper "white noise" rather than a definite tone.
That's for sure. J. Gordon Holt died of emphysema. My entire immediate family, parents and brothers, died from smoking. I was the only one who didn't smoke.
I started as a test and tune tech in the Motorola factory with a high school education. In just over 11 years I had impressed enough people to become an engineer in product development without an engineering degree. 6 years later Mot offered to pay my way through college at age 37. I was never a model student, but I managed keep a 3.92 GPA while working a 50 hour week. Despite hating math, I got the highest grade in the class in 4 out of 5 math classes.
I went on to get a masters degree, and use my engineering skills to design circuits, complete products (including 2 Nextel phones), and invent new technology. In the 30 years that I worked as an engineer, I NEVER used any math requiring anything more powerful that the Windows Calculator in my PC! Do I remember any of that college math????? I can remember vacuum tube type numbers I haven't seen since high school, but NO I wouldn't have a clue what to do with a differential equation.
My near field vision started to go sooner than that. I started losing the ability to focus up close at age 40. I had eye exams twice a year since age 27 due to a laser blast in the eye. The degradation peaked at age 45 and my eyes stopped changing at 55. I have had the same eyeglass prescription since then.
I agree. Keep learning....something, anything that uses the mind.... I read tech magazines (Elector, Circuit Cellar, etc) and check the new products from the major chip companies often. I look up cool parts and think about what I could make with them. Sometimes I stuff a wild idea into LT Spice and see if I can make it work. Turn off the TV and do something mentally stimulating.
Again, I agree. Sitting on your butt in front of a computer or in meetings for 10 hours a day is VERY BAD for you. It seems that the heart attack and suicide rate in the plant was quite a bit higher than the national average. Two of my previous bosses died a short time after retiring. Several stress relief programs were offered, and a complete gym was installed on premises and offered to the employees at zero cost. Very few employees took advantage of these programs.
I had watched my father's health decline, primarily due to inactivity, and saw several friends get cancer, a heart attack, or pass away. I decided that I had to make some changes. I changed jobs within the company to get out of the high stress cell phone group. I joined the free gym and went 4 to 5 times a week for 14 years. I now had almost regular hours and went almost 10 years without working through every weekend. Life looked a whole lot better.
Evil stuff. It did its part in my parents demise even though they quit a dozen years or so before their deaths. It still amazes me how many people still smoke...especially young people.
In NTSC the horizontal (line) sweep frequency is 15,750 Hz for Black and White transmissions, and 15,734 Hz for Color. The CRT itself emits no sound. The horizontal sweep circuits pump up to 40 watts of energy through the flyback transformer into the magnetic deflection yoke. The flyback is usually housed inside a metal cage for EMI shielding. It is usually this cage that emits the most sound. The flyback and the yoke are also big contenders. Yes, it is possible for these parts to vibrate at subharmonics of the sweep rate.
The line sweep rate is much higher in HDTV. It depends on the format being broadcast, but it is well above any human's hearing range, and there is virtually no energy being used. The "sweep" is just the switching of pixels in the LCD panel. This is a few volts at nano amp levels. No sound will be emitted.
The tinnitus levels inside my head have gotten pretty bad. My last ear exam 3 years ago revealed 40db of hearing loss in my right ear and 20db in my left. This is the result of a 25 year battle with Menieres Disease, which also brings debilitating dizziness, and in many cases eventually complete deafness. There is no known cure, and the cause is unknown.
The Tomatis Sound Therapy system is supposed to be quite useful in combatting Miniere's Disease
I have suffered from Tinitus and CPS for some time and the occasional bout of Miiere's and used the Tomatis technique that's promoted as the 'Sound Therapy' with remarkable results - I've maintained my elimination of both tinnitus and the CPS for some years now with the regular listening sessions of the same old modified cassettes - very effective
I'm not at all sure about any of the other extreme claims about Dr Tomatis' System but for my 'simple' hearing difficulties, it sure made life tolerable again.
hope this may be useful ...
I have suffered from Tinitus and CPS for some time and the occasional bout of Miiere's and used the Tomatis technique that's promoted as the 'Sound Therapy' with remarkable results - I've maintained my elimination of both tinnitus and the CPS for some years now with the regular listening sessions of the same old modified cassettes - very effective
I'm not at all sure about any of the other extreme claims about Dr Tomatis' System but for my 'simple' hearing difficulties, it sure made life tolerable again.
hope this may be useful ...
I worked at a government research lab for most of my life (LLNL)..... one of the senior ranking EE's once told me that no more than 2-3 engineers (out of hundreds) used calculus there. I have no idea where advanced math is used or needed except in theoretical studies in physics.
Ringing in the ears--- noisy environment of course but also high blood pressure will cause it.
-RM
Ringing in the ears--- noisy environment of course but also high blood pressure will cause it.
-RM
Found the sony tv of old to be loud on the flyback . Years ago spent time in a tv broadcast studio that was loud drove me out of the place. Airport not so bad ear plug and gun muff all day long . Lets me hear the tinnitus in my head better the voices also. Regards
Hi: sleighbells ringing all year long here too. Resulting from over ambitious duck hunting with a 12 guage over the years.....may have been my lack of accuracy....Anyway have been taking Gingko biloba for five years...helps a lot except when overtired or in the car alone. Can't hear the last two keys on a piano but can still listen to the likes of Grace Chapman and Jill Barber and appreciate what I am hearing. My wife keeps telling me I can't hear her all that well though. You all have a good day because you can.
Also a badly fitting bite or other jaw problems may cause muscle noise from the jaw to intrude as well.
Just a thought..
What would be the point of any of this..
(Assuming it had any relevance at all!)
To make something (like us) and then strip it all away (in old age) giving you time to think about it..
LOL
Regards
M. Gregg
Or God has a sense of humour!
A shoulder/vertebrae problem can cause a non-fitting jaw joint, aka the caput mandibulae is displaced from where it should be located in the cavity of the temporal bone (one side or on both).
In effect, your story follows.
(what to say, I'm a sleazebag, shot lots of xrated porn pictures of articulus temporo-mandibularis joints, Fellatio ? No, articulatio)
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Or God has a sense of humour!
The only conclusion (if it means anything at all!) everything in the end means nothing.
So what would be the point? For something to be learned there would have to be a conservation of knowledge
(the realisation that everything means nothing)
Without the everything there could be no realisation.
LOL to know you exist there would have to be an awareness...
What would it mean to be self aware in nothingness..
The transition into awareness..
The sound of one hand clapping...(perhaps a realisation I had not considered).
Regards
M. Gregg
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Most definitely there..... which is a good lead-in to another fact I was alerted to while at LLNL..... they never hired theorist because they didnt know if something could actually be made from their formulas nor if it would even work. This was an Applied Science Lab... we designed and built things that had to work. If they needed more theory, they went to the universities for answers.
Natural facts. So what does it all mean in the end? Nothing but survival skills and personal pleasure seeking and quest for more knowledge - as far as I can tell.
-Richard Marsh
-"nearing mid 30's"? - some of us have sneakers older than that
My Weller soldering gun will be 50 next year.
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