From FB group James Short What the Game makers did was buy windowless 27C64 EPROMs, for example. That makes them cheaper, but you can only program them once, because they couldn’t be erased. Once they had finalized the firmware, they had it mask programmed into ROMs at the chip factory, because they could order enough
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From the FB group Building Transistor Radios Willie Barnett The generic 901x series are very cheap jellybean transistors used in consumer electronics, typically made in Asia. The 901x was preceded by C, but other companies used other prefixes such a S901x for Fairchild (now ON Semi), or CC901x, or even MPS901x or MMBT for surface
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First paragraph from FB group Bell Telephone… I had one of these Casio Data Tel watches, but I never used that feature. I used the calculator a lot, though. The buttons got scuffed up badly when I worked in tight places. I’ve had many Casio calculator watches, up until lately when I started using my
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A comment added to YouTube video Hey, thanks for the very informative video. I have one suggestion. Many of us have no need for the PVC glue stuff after we have completed this project. I think it would be cheaper and better to use screws and holes drilled in the PVC to hold it together
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From FB group Orange Talk Robert Baca Nope. I’m not in favor of taxes. And I’m not in favor of illegals either. But you yourself talk about the Barrio, and how the life wasn’t good. I remember when Chapman and Hewes, which was then called Alameda, was unimproved with no curbs, roads just ended and
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From FB group Orange Talk Melanie Rhoads You said “they are here…” By “they” I assume you mean Illegal aliens. By here I assume this country. If so, there are over 11 million illegals in the country, and over a million of them in California alone. Your “100’s of thousands” is too low by ten
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From FB group Bell Telephone of the US… Dan Bottoms It seems to me that a good way to avoid generator synch hassles would be to do the same thing that our Exide UPS does. Incoming power is rectified to keep the battery bank charged. It’s passed through to the equipment, until it drops out,
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From FB group Bell Telephone of the US… When I was in the army in Germany, one of the guys in my comms unit was a lineman. He asked me where I was from and I said, So. California. He said, “Man I couldn’t live there! They have earthquakes!” I asked him where he was
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From FB group Building Transistor Radios Both versions have pros and cons. I’m not trying to take sides just make some observations. #1 (Willie’s) has the 2N3904 and 2N3906 for output Transistors. They can handle only about 100 mA and they easily go into thermal runaway, especially when it gets warm. The 3904 can be
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This is from the FB group Building Transistor Radios This is the schematic of the reflex receiver built by Nick Bastian. The first transistor is a C9018 NPN RF BJT. The remaining two transistors are 2N3904 NPN BJTs. The coil is a standard ferrite loopstick from a transistor radio.
