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Old 3rd June 2013, 11:57 AM   #40041
Bonsai is offline Bonsai  Taiwan
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Quote:
Originally Posted by sonidos View Post
That's ok. When I was a young buck, I read Walt Jung's Audio magazine article on how to swap op amps and caps to get improved sound from my Philips/Magnavox CD Player. I ordered the parts from Digi-Key and when they arrived, went on a 14 hour session of de-soldering and soldering. I didn't even stop to eat and was pretty woozy at the end. But boy, I was very proud of the result!
LOL I have similar experiences. Even sleeping under the bench, because I was too whacked to drive home, no kidding.
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Old 3rd June 2013, 12:42 PM   #40042
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Pavel,

Things still dry for you?

ES
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Old 3rd June 2013, 01:01 PM   #40043
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Yeah.
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Old 3rd June 2013, 02:23 PM   #40044
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Originally Posted by jacco vermeulen View Post
Brag racing ?
Plenty of youtubes of these things in fantastic de-construction, my grandfather was a NASCAR fan my only fond memories are the demolishon derbys before hand. There also is a first flight of a maxed out RC jet plane model (~$7000), right up then right down in flames.
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Last edited by scott wurcer; 3rd June 2013 at 02:26 PM.
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Old 3rd June 2013, 02:45 PM   #40045
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Brag racing ?


se
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Old 3rd June 2013, 02:53 PM   #40046
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Quote:
Originally Posted by sonidos View Post
That's ok. When I was a young buck, I read Walt Jung's Audio magazine article on how to swap op amps and caps to get improved sound from my Philips/Magnavox CD Player. I ordered the parts from Digi-Key and when they arrived, went on a 14 hour session of de-soldering and soldering. I didn't even stop to eat and was pretty woozy at the end. But boy, I was very proud of the result!
Way back when (still at school) my part time job paid for components (I also reused components from scrap from the local tv/radio repair shop), blank pcb, Dalo etch resist pen and ferric chloride.
Out of my imagination came a surface mount pcb (long before I had ever heard of them, much less seen one) amplifier incorporating LM380 chipamp.

By logical reasoning, it turns out that I did everything very correctly.... ground, supply and signal routing wise long before I had read anything more than an app note in a National Semiconductor Applications Handbook in my school library.
A whopping 2.5W per channel , but a whole lot better sounding than the output amplifiers in the Sanyo radiogram that I used as a source, and I even back then I experimented with supply caps and output caps and differentiated sonic changes.

Next was a magazine kit amp using balanced output car amplifier ics....of course that got tweaked, and ended up being an especially good amp.

After that came 'proper' ETI480 amplifiers fitted into a written off Nikko TRM-750 amplifier that did a million parties (with fan cooling).
All sorts of tweaking experiments yielded a really good integrated amp that everybody enjoyed and of course I got to enjoy it myself between parties .....I was proud of the result also...

That all turned into a career in audio electronics repairs, and that has given me great opportunity to audition and build a vast memory library of all manner and forms of audio gear.
Like JC and many others contributing here, this long term (sighted) auditioning becomes very valuable experience.

More later..

Dan.
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Old 3rd June 2013, 03:05 PM   #40047
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Originally Posted by scott wurcer View Post
maxed out
Depends, a friend is in the top class of R/C helicopter competition.
A 3.5'' size costs about $70k to build at home, with NDA signature for the software.

But he's currently co-developing a full-size 2-seater (in-line) with some folks abroad, targetted at a market retail of the same level.
(plus a servo self-balanced walking cane on his own, as a Segway or that Japanese airport luggage 2-wheeler, but tilted backwards instead)

The High-Tech of H1, I fail to see, ancient Lycoming gasturbines.
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Last edited by jacco vermeulen; 3rd June 2013 at 03:07 PM.
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Old 3rd June 2013, 03:19 PM   #40048
RNMarsh is online now RNMarsh  United States
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Originally Posted by jacco vermeulen View Post
Brag racing ?
The High-End of boat racing. Unlimited performance level. The fastest in the world. At what ever cost to get there. The best that can be made. A level far, far above ordinary bragging rights.

If you are going to do something, do the best you can.

-RNm

Last edited by RNMarsh; 3rd June 2013 at 03:24 PM. Reason: Ordinary vs high-end --
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Old 3rd June 2013, 03:30 PM   #40049
RNMarsh is online now RNMarsh  United States
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Originally Posted by jacco vermeulen View Post
The High-Tech of H1, I fail to see, ancient Lycoming gasturbines.
Sure, like the AA Class -Top Fuel - drag racing engines are really just ancient hemi V-8's.
??

-RNM

Last edited by RNMarsh; 3rd June 2013 at 03:37 PM.
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Old 3rd June 2013, 04:08 PM   #40050
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Originally Posted by RNMarsh View Post
The High-End of boat racing. Unlimited performance level. The fastest in the world. At what ever cost to get there. The best that can be made. A level far, far above ordinary bragging rights.

If you are going to do something, do the best you can.

-RNm
Greenhouse effect...what greenhouse effect ?....stupendous amounts of fossil fuel expended and to what effect....excepting egos ???.

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