just realized I haven’t checked the messages here for a while.
it’s my instagram. and it’s mostly about the tweed amps. feel free to drop me a line
https://www.instagram.com/tweedfreak/
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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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(Picture by Alexander Gerst from the ISS)
We take good old O2 for granted. People are always going on about how early Earth was “perfect” for life. A perfect hell maybe. No ozone layer, no oxygen, extreme heat, an abundance of highly corrosive chemicals in the atmosphere including sulfur and methane.
Much like found on Titan the largest of the moons of Jupiter today. It was a literal red sky hell. With all of that methane and sulfur, it must have smelled like a frat house on chili and hard boiled egg night. So, the Earth was devoid of oxygen in the beginning but as I said there was a metric butt-load of methane and sulfur in the oceans.
So, little single-celled organisms developed that lived on methane and sulfur. After a while, the sulfur level dropped and the methane level did as well. No one is sure why. There still was little oxygen. So some more little critters evolved which produced oxygen called “cyanobacteria”.
It took a billion years for these critters to terraform our planet for the evolution of animals and more complex plants. To this day all plants incorporate these ancient cyanobacteria into their cells in structures known as a “cyanoplasts”. You see life itself changed the planet to support life.
This is what life does.
More informations to this topic: https://en.wikipedia.org/wiki/Great_Oxygenation_Event
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Many new generation R/C car racers recognize Yokomo for making its name after Ryan Maifield won the 2017 IFMAR World Championships in both 2wd and 4wd, but little do they know, Yokomo has been winning races around the globe for over 30 years. For this week’s Flashback Friday we revisit some of Yokomo’s earliest successes in the world of off-road.
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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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it took a while to get the original Astron mimimite capacitors for re-stuff. came to 33uf + 22uf + 22uf and it turned out great with zero hum and Fender tweed deluxe voicing. it’s funny I met this amp a while back. a friend of mine had it. then another friend owns it now
tried P12N and came back to the original smooth cone P12R after fixed the voice coil rub.
it was like this when it came to me. the voltage dropping resistor fell off once I touched the soldering joint with my iron for 0.1 sec. a bit scary I could say.
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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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visit our website: https://www.digitalpressworks.com We added this to our projection mapping show for Halloween! A view from the sidewalk in front of our house
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Researchers at the Massachusetts Institute of Technology (MIT) and Harvard Medical School have teamed to develop a novel tattoo ink that can show your body’s health changes.
The novel ink consists of biosensors that react to changes in the tissue fluid and make the skin an “interactive display”. So far, researchers have investigated four biosensors that respond to three types of body information, changing their colors.
As the pH-value increases, the color changes from violet to pink, an increasing sodium content is seen as a bright green under UV light, and blue becomes brown when the glucose level increases.
This animation from a video of the researchers shows how such a tattoo might look like: 
Especially for diabetics, a tattoo with ink that reacts to an altered glucose level could be useful. They have to prick their finger with a small needle if they want to measure their blood sugar level – usually several times a day. This procedure can be painful in the long run and can lead to small scars.
You can read more about this innovative technology here: https://www.media.mit.edu/projects/d-Abyss/overview/
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You think that the universe resides outside of you and it is true that there is something out there all right. However, that something is nothing like your perception of things. Let’s take the materialist view. That is that everything is just “stuff”. Atoms, molecules, quarks and radishes and all kinds of other “stuff”. That stuff is a kind of vibratory energy through which other kinds of energy flow. Energy is likewise “stuff” just in a different form.
Your brain for all of its gooey gray grossness is a pretty complex thing. More complex than just about anything else in the universe. Stars and planetary systems are BIG but relatively simple. Now, within this gray matter are trillions perhaps a hundred trillion or more neurons. These are specialized cells. They are connected with neural pathways like a gigantic and complex net. When we observe we make pathways. When we think we make other pathways in exactly the same fashion except that the data comes from the brain, i.e. the pathways that are already present.
The brain forging neural networks in real time.
Now, everything you know, remember and experience has no existence for you aside from patterns in this network which began to form the instant your brain developed enough in the womb. So, all of your experiences are just patterns. If the patterns were changed, as in an accident then your reality changes. It is all just patterns connecting and relating to other patterns in this neural network. This is thought, cognition and self-awareness on a macro scale.
Yet, reality, objective reality is something else altogether. It has an extrinsic existence outside of this pattern of neural networks. Your knowledge of it is very limited. Just enough to get around, find food shelter and a mate. When you sleep something else happens. The network fires in patterns. Not random patterns. Very meaningful patterns but without the necessity of obeying the laws of time, space or physics.
Consciousness is so much more complex than even the greatest neuroscientists, medical researchers and philosophers can even begin to grasp and the waking mind is the least significant part of the picture.
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old Philips caps from Holland factory and German Roederstien are my favorite for filter caps and cathode bypass caps.
I cut the aluminum cans and put Philips caps inside of 70’s Sprague paper sleeve caps.
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