en 5F1 Champ B+ voltage with 5y3, 5u4, 5r4, and 5v4g rectifier tubes

Updated on August 28, 2020 | 341 Views all
0 on August 28, 2020

5y3gt 354v

5r4 365v

5u4 373v

5v4g 384v

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  • en How it all ends. Maybe.

  • “Some say the world will end in fire, Some say in ice. From what I’ve tasted of desire I hold with those who favor fire. But if it had to perish twice, I think I know enough of hate to say that for destruction ice Is also great and would suffice.” Robert Frost (1874-1963)

    The end of the world may come slowly, but it’s inevitable. Our sun, exhausting the hydrogen-fuel of the core, will successively burn the outer layers and doing so becoming hotter and expanding in size. In estimated 7,59 billion years a red giant will engulf the earth – or whatever still be left over of the once blue planet.

    Already in 1,6 billion years the hotter sun will evaporate the oceans, and plate tectonics, whiteout enough water acting as lubricant in subduction zones, will stop. Without plate tectonics erosion will become a dominant factor. The increased radiation of sun will modify the chemical composition of earth’s atmosphere. The light hydrogen will also “evaporate” into space and the heavy oxygen will accumulate on the surface of earth. In this denser atmosphere rare, but strong, rainstorms will cause large mudflows in the last mountain ranges. Mountains will be eroded and basins filled with sediments and earth’s surface will become a plain desert. The iron in the sediments will react with the oxygen and earth’s colors will change into a permanent red, like planet Mars today. In the dense atmosphere temperatures will still rise, dissolving gypsum and other sulphur-bearing rocks. The free sulphur will react with the traces of vapor left in the atmosphere and it will rain sulphuric acid from earth’s sky.

    In 7,5 billion years the expanding sun will gravitationally lock earth and one side will now face always towards sun. In the sunny side the temperature of earth’s surface will rise to 2.200°C, on the dark side of earth the temperature, without an isolating atmosphere, could plunge to -240°. Basalt, one of the most common rocks on earth, melts at 1.100-1.200°C, on the sunshine side it will be so hot that a molten magma-ocean forms… and it will start to evaporate. Between the hot side and cool side of earth the evaporated elements, like iron and silica, will form rain and like today snowflakes form a landscape composed of snow, iron- sodium-, magnesium- and potassium-flakes will form an eerie landscape composed of these elements. Rock-glaciers will descend from the mountains to the shores and icebergs of rock will float into the magma-ocean.

    Excerpt – Read the complete article here: https://blogs.scientificamerican.com/history-of-geology/how-it-all-ends-8230/

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  • en Yokomo 870C build from the parts

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    front wide setup with Works CVD, SRS steering knuckle.
     

     

    #yokomo #yz10 #cvd #870c

     

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  • en Yokomo YR-4 special

  • there were more than one, at least two different YR-4 Special models I remember. this one is one of them. it came with carbon graphite top deck, shocks towers, and the chassis. the top deck was fragile and everyone knew it. at the same time everyone wanted to try it as well.

    this YR4 special is pretty much with stock parts except for Tech Racing shock mounting hardware which looks brilliant.

    I don’t have any plan for a racing track in a near future. but this white bulkhead caps brought a magical moment like the one I had yesterday. yeah it’s and addictive hobby. maybe all the hobbies are

     

     

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  • en Yokomo ’95 YZ10 W.C.S Aka Pavidis parts list

  • I made this list from Asso_man!’s RC10talk thread a couple of years ago. and just noticed the file I uploaded has gone somwhere.

    Yokomo YZ10 W.C.S part list thread on RC10talk

     

    the scanned images are here

    Yokomo YZ10 Pavidis Part list #1 & #2

     

     

     

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  • en Jconcepts BJ4 went to retro – update

  • This update has done a couple of years ago. and, I noticed I haven’t updated the pictures. here they are

    And, the leftover stock parts from BJ4 and B44

     

    #BJ4 #Jconcepts #B44 

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  • en my recent 5E3 build

  • they are my recent build with some vintage components like Philips caps made in Holland and Roederstein caps made in W. Germany.

    one of cabinets is 18″ wide version like the early 5E3. Fender changed the width to 20″ right after some of the transition models. even there were wide panel 5E3 at ’55.

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  • en JBL D120F from 70’s Fender twin reverb

  • Not sure what I’m going to do with this speaker while I don’t have any SF or BF fender. I remember my friends older than me loved it when I was a kid. even I still remember how the sound was. I saw the same speaker with gray and orange frames. this D120F came from 70’s silver face twin reverb and it’s orange. and it still has the original cone

     

     

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  • en Crazy Bird – Wild Child

  • en fender tweed champ 5F1 1956 with 6 inch speaker

  • this 6″ speaker has the model name 6EV on it. I guess it’s Oxford from the 6EV. Oxford 8″ was 8EV-29 .

    this Champ had some noise issue even without any input signal. it came from oxidation and fixed instantly with EML contact cleaner. I don’t use the infamous Dexoit anymore. the residue from Dexoit caused some problem on the vintage cloth pushback wires. EML is still the best for tube pins, input and output jacks and plugs, and potentiometers so far.

    the filter caps were alive but the volume level was too law and didn’t sound like a Champ. this Champ sounds getting alive while the new caps are broken in already. the replacement is 33uf+10uf+10uf like my old Champ amps.

    the texture was nice with GE black plate 575. but turned out it sounds great, I mean more like the Champ sound with RCA black long plate 12ax7 from late 50’s. I prefer 8 inch speakers but this 6 inch Oxford still sings 

     

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  • en Static electricity could charge our electronics.

  • Unhappy with the life of your smartphone battery? Thought so. Help could be on the way from one of the most common, yet poorly understood, forms of power generation: static electricity.


    (Image credit: Schlueter/Getty)

    “Nearly everyone has zapped their finger on a doorknob or seen child’s hair stick to a balloon. To incorporate this energy into our electronics, we must better understand the driving forces behind it,” says James Chen, PhD, assistant professor in the Department of Mechanical and Aerospace Engineering in the School of Engineering and Applied Sciences at the University at Buffalo.

    Chen is a co-author of a study in the December issue of the Journal of Electrostatics that suggests the cause of this hair-raising phenomenon is tiny structural changes that occur at the surface of materials when they come into contact with each other.

    The finding could ultimately help technology companies create more sustainable and longer-lasting power sources for small electronic devices.

    Supported by a $400,000 National Science Foundation grant, Chen and Zayd Leseman, PhD, associate professor of mechanical and nuclear engineering at Kansas State University, are conducting research on the triboelectric effect, a phenomenon wherein one material becomes electrically charged after it contacts a different material through friction.

    The triboelectric effect has been known since ancient times, but the tools for understanding and applying it have only become available recently due to the advent of nanotechnology.

    “The idea our study presents directly answers this ancient mystery, and it has the potential to unify the existing theory. The numerical results are consistent with the published experimental observations,” says Chen.

    The research Chen and Leseman conduct is a mix of disciplines, including contact mechanics, solid mechanics, materials science, electrical engineering and manufacturing. With computer models and physical experiments, they are engineering triboelectric nanogenerators (TENGs), which are capable of controlling and harvesting static electricity.

    “The friction between your fingers and your smartphone screen. The friction between your wrist and smartwatch. Even the friction between your shoe and the ground. These are great potential sources of energy that we can to tap into,” Chen says. “Ultimately, this research can increase our economic security and help society by reducing our need for conventional sources of power.”

    As part of the grant, Chen has worked with UB undergraduate students, as well as high school students at the Health Sciences Charter School in Buffalo, to promote science, technology, engineering and math (STEM) education.

    Source: http://www.buffalo.edu/news/releases/2019/01/024.html

    #Sustainability #Engineering #Science #World #Future

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