en 5×4 tweed champ project

Updated on July 13, 2020 | 1066 Views all
5 on June 9, 2020

only the speakers I got so far and the cab will be done in a month give or take. they are 5″ alnico speaker Fisher branded. the frame looks like Oxford and I believe they came from Oxford.

 

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0 on June 13, 2020

tried one of them with my 5F1 champ and it sounds great. the diameter is exactly 5″

 

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0 on June 22, 2020

the mounting hole is big enough for 8/32 screw and the center to center is 4 11/16″

 

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0 on June 27, 2020

found 4 of 5″ speakers with Zenith label from two different ebay sellers while I’m waiting for 4×5″ wide panel deluxe size cabinet for 5F1 chassis from Mergili.

918 looks like EIA manufacturer code. and a few web site claim it could be Oaktraon. then I found some speakers with the same code along with the Oaktron logo.

the frame looks pretty close to my Fisher 5″ speaker. and this Zenith has this way different cone. hope the frequency range meets my need.

two of them has 1958, and another pair has 1961 date code. I’m really wondering what they sound like with 4×5″ setup with 5F1 circuit

 

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0 on July 4, 2020

breaking in the speakers and the cabinet with 5B3 while my 5F1 hasn’t finished yet. 4×5″ with Tweed Deluxe wide panel cab sounds loud as much as the original 12″. and it has the speed of the small speakers. I love it

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0 on July 13, 2020

finished the chassis

 

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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 NPN Germanium transistor list for Fuzz pedals

  • My interest in fuzz pedal came from JMI Tone Bender III reissue which belongs to a friend. this pedal has 3 of OC75 glass tube transistors.

    And, unfortunately, My Sola Sound Bum Fuzz came with 3 of NPN transistors while OC75 is PNP type. then found this web page with germanium and silicone transistor lists

    http://vintageradio.me.uk/info/radiocon_data_trans.htm

    There are 26 of germanium NPN transistors from the data sheets

    ASY28, ASY29

    2N388, 2N388A

    2N1302, 2N1304, 2N1306, 2N1308,

    OC139, OC140, OC141

    AD161

    AC187

    NKT713, NKT773, NKT774, NKT781

    2SD72

     
    Black glass tube NPN transistors are OC139, OC140, OC141 from them.

     
    OC75 is like this according to this web page on alltransistors.com

    Type Designator: OC75 (PNP)

    Maximum Collector Power Dissipation (Pc): 0.125 W

    Maximum Collector-Base Voltage |Vcb|: 20 V

    Maximum Collector-Emitter Voltage |Vce|: 20 V

    Maximum Emitter-Base Voltage |Veb|: 10 V

    Maximum Collector Current |Ic max|: 0.01 A

    Transition Frequency (ft): 0.1 MHz

    Collector Capacitance (Cc): 50 pF

    Forward Current Transfer Ratio (hFE), MIN: 55

    And, for OC139, OC140 is

    Vcb: 20 V / 20 V

    Vce: 20 V / 20V

    Forward Current Transfer Ratio (hFE), MIN: 40 / 75

     
    I’m going to try OC139. simply beccause, OC139 is cheaper than OC140 on ebay. and I’m wondering how Transition Frequency differences work with Fuzz. I’ll update in a few weeks

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  • en Belden E3462-C cord makes my tweed amps dead quiet

  • needed a longer AC cord for my 5D3 and tried E3462-C cord. this cord noticeably reduces noise even while it has more amps and computers share the same AC and audio source.

    then I replaced all the AC cord with this for my tweed amps. the most dramatic change comes to ’59 5F1 which was quiet alone but it cannot be hooked up with AB box. even 60hz hum was loud when it shared the same AC power source without AB box. ground lift didn’t work either. it just shifted the noise frequency

    this seller has the cable. but, only one of three was correct. two of them were E3462 without C. they are metal shielded and the noise was louder than 2 prong cord.

    https://www.ebay.com/itm/Black-CPU-Power-Cord-Cable-SVT-E-3462-C-LL-30830/253801406241

     

    found another seller had the correct cable. and finally all of my tweed amps are dead quiet at any circumstance with E3462-C. even there is no difference between the original and modern 5F1 with or without the center tab.

     

    and this typical ac cord wasn’t that bad for 5D3 but there is a huge difference with 5F1. E3462-C is still way better for 5D3 as well.

     

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  • en LSD – No New Friends (Official Video) ft. Labrinth, Sia, Diplo

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  • en this CTS 1M potentiometer w/spst switch looks right for 5F1

  • Never used. Nylion shaft – no washers or nuts. 1377940 600-01-33. AUDIO Taper 10% at center position. Lot of 10.

     

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  • en DNA: Life’s Changelog

  • One of the most interesting things about DNA is that we have discovered, in humans, the 3% of the code which builds our physical bodies also has encoded within the bodies of all of our ancestors. We can switch on these old systems (in animals of course since this would be highly unethical to do to human beings) and give a chicken teeth or scales. We are not just us. We are all the physical forms in our lineage.

    Now, that accounts for 3% of our storage. What of the other 97%? It is memories. Now the skeptic will go “yeah right Mr. Science”. Hear me out here though. Why is it so hard to accept memories encoded into the helix? In fact all “instinct” is encoded memory. What beach to lay your eggs by the light of the full moon if you are a tortoise. Where to migrate if you are a starling or a monarch butterfly. Sharks even have maps of the magnetic markers on the seafloor. None of this is learned. It is there at birth.

    There is a very good evolutionary reason for this. Rapid adaptation. We have a repository of past experiences so we do not have to reinvent the wheel every time our environment changes. Human beings have noted this for at least as long as we have records and this has given rise to theories of reincarnation which appeared in nearly every civilization on Earth. Science has resisted this because it sounds too “supernatural” in the same way they resisted the “Big Bang” because it sounded too much like creation. Yet, it is anything but supernatural. It is entirely natural and the only explanation which makes any sense.

    #Science #Philosophy #Biology #Life #Origins

    (Picture courtesy of Ya-Webdesign)

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  • en gathering information on vintage tweed champ output transformer

  • while I’m working on a tweed champ 5f1 replica with 10″ speaker, I recall they say the output transformers affect the tone.

    and, I noticed I never saw the back side of champ chassis before. it’s where I start finding a vintage OT for my project

     

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  • en inside of Wem Pepbox rush from British Pedal Company

  • I see two of ACY41 germanium transistors on the board.

    Grabbed this off ebay for a great price. two hundred something in USD. it sounds great and quite different than my Bum fuzz and old Sola Sound fuzz pedal a friend has.

    but, it has an issue. it rattles on high level. I’m sending back this back to British Pedal Company. 

     

     

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  • en don’t want this but still interesting

  • Barbie is getting a David Bowie Makeover. This Barbie x David Bowie Doll is a part of the Gold Label Collection.

     

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  • en 1/8″ custom towers for Hot Dog 4

  • they are 5mm extended front tower and the rear tower with the original shape. the original towers have extra holes for shock mounting. and they were not strong enough. the new towers are strong enough with this thick g10 epoxy material.

    870c shocks are beautiful and they leak. and they are beautiful enough to set on this shelfer.

     

     

     

     

     

     

     

     

     

     

     
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