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  1. John R Retired

    OLD Tektronix Oscilloscope Identification

    Does anyone recognize this old Tektronix Oscilloscope? Looks like it says, "Type 531" Is it worth anything?
  2. John R Retired

    Artificial Intelligence---What is the Hardware Behind it?

    What is the Hardware Behind it? How does it work?
  3. John R Retired

    Math Severity as applied to Serious Electronics

    How much Math do you really need to seriously work with electronics? "Seriously" is the keyword, meaning to be taken serious by someone who makes their living as a Tech or Engineer in the Electronics industry. There are the typical formulas, OHMs law, Resistors, capacitors, inductors series and...
  4. John R Retired

    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Many people are using Arduino (& Rasberry Pi ?) to make functioning electronics devices naowadays using code & programming. I know Arduino & microcontroller ARE electronics devices, but a lot of makers avoid electronics and instead use the software capability of Arduino to make what used to be...
  5. John R Retired

    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    New to Arduino, although I have done some programming. There are many Arduino starter kits available on Amazon. There are quite a few configured package choices with different extra components included for the money. Which one would be considered the, "Best Bang for Your Buck" and would give...
  6. John R Retired

    Backyard DIY Auto Repair and Backyard DIY Electronics Repair

    Do electronics experts here think it possible to draw a parallel comparison between these 2 functions for practical useage? I have changed my brake pads, replaced a broken steering rod and CV boots (and grease), changed spark plugs, changed engine oil, added AC coolent, and other maintenance...
  7. John R Retired

    Older Big Discreet Circuits versus Multiple Micro Circuits in ICs

    This subject-question is rather old school antiquated, but just for understanding the significance modern micro-miniature circuits in IC packages comparedto old school big circuits. If you took an old discreet circuit like an audio amplifier, or radio or whatever complete circuit with all its...
  8. John R Retired

    Electronics Knowledge and Skill Level of This Forum

    Is this forum supposed to be geared towards technician or engineer level of electronics? Or is it for any level of electronics skill and knowledge? A related question is this a forum where actual techs or engineers would go for answers to a problem they would run across in professional...
  9. John R Retired

    Best Ham Radio Transceivers (base station and mobile) for Long Range Communication in case of Disaster by Nature or Human.

    As described in the Title of this thread, what would be the best Ham Radio gear for general communication if cell phones service goes out like what happened with AT & T blackout recently? (Talking about Voice communication not Morse Code). What are the current license theory equirements for...
  10. John R Retired

    Vacuum Tubes (Valves)

    Is there any real world application today where vacuum tubes are more useful than semiconductors? Or, are tubes completely obsolete and a waste of time and money in todays world?
  11. John R Retired

    Modern Day Use for Old Electronics vs New Electronics. Is it Realistic & Practical?

    I took a course in linear ICs and digital circuits in 1979. Tubes in 1970. I worked in a company in the mid 80s where they used PC boards about 20 X 20 inches square with many chips and auto-soldered on wave solderers. Eventually in the 90s they started replacing them with smaller boards and...
  12. John R Retired

    Knowledge Threshold from Hobbyist to Professional

    In contrast with a student who goes to a trade school or junior college to formally study electronics for a 2 year degree. A vague threshold but is there a dividing line (i.e. "electronics theory knowledge") between someone who gaining self taught skills tinkers around building miscellaneous...
  13. John R Retired

    Analogue Meters for Nostalgia Sake

    I use digital meters like most people today, but started learning electronics with analogue meters (with needles) example being the "Simpson" model and recently seen some on Amazon for not too much. Does anyone know if these are worth getting for any serious measurement? I don't really need...
  14. John R Retired

    Opinions on This Oscilloscope

    Anyone know about this scope? Seems to be the lowest priced common digital scope around with regular tactile panel controls as compared to other scopes of its style like Siglent, Hantek, Rigol etc. $184 U.S. dollars...
  15. John R Retired

    AUTO-CAR CD Player Won't Play a CD (Mechanism maybe?)

    This is a SONY Car CD-Radio; Model ID is "CDX-GT510, Drive 5" Made to load one CD only. This is the type where the front control face can be removed for theft prevention. 3 main Modes are, "Radio", "AUX", "CD". When in CD mode after it pulls in a manually inserted CD, a message comes up...
  16. John R Retired

    Best IC Assortment, both Linear and Logic.

    Which ICs (identification numbers & group) in an assortment box (Amazon, Ebay etc) would be adequate enough to cover most applications for comprehensive useage for learning and hobbyist about ICs?
  17. John R Retired

    Who Here is into Arduino & Raspberry Pi. Are You Also Serious About Electronics?

    Underlying these questions is the significance TODAY of these Microcontroller devices, compared to the significance of Pure Electronics, although they are related. In other words, a lot of non-electronics people are into Arduino project "Making", with minimal electronics knowledge and are...
  18. John R Retired

    Swapping Out Boards, Repairing and the Economics Considerations Involved

    One issue with repairing electronics is the cheapness issue. Even back 25-30 years ago I worked at a company that made electronic financial related machines. When a component went bad fixing it was considered a waste of time and money. The whole board it was on was swapped out and replaced. The...
  19. John R Retired

    HAM Radio Relevance Currently and Personal Reflections.

    I remember way back before the internet or even home computers having a Ham Radio setup was really phenomenal. A Ham I knew just down the road had a 6 Meter transmitter in a large cabinet in his garage that almost looked like a small commercial radio station that he built from scratch and an...
  20. John R Retired

    Oscilloscopes:2 Channel, 4 Channel, 100Mhz, 500Mhz etc.

    Home Bench Usage: Which One to Buy for "All-Round Electronics" applications whether it be Repair and Troubleshooting or Engineering. Audio to RF Microwave etc. One that would handle "Most Situations". Prefer New Digital, over used Analog or perhaps one of each since used analog is not too...
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