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I was in the Navy in the 60s as a FT (gun fire controlman). The analog computer that aimed the guns was the Mark 1 Able (MK1A). While not as accurate as digital methods, analog computers have the

I never did get to Meshna's place or B&F but I bought stuff from both via mail order (the forerunner of online shopping). I think it was a WW II passive infrared night vision unit I got from Meshna -

The EIA stuff used piecewise diodes and had programmable DFGs. The manual includes the complicated procedure of reducing an arbitrary function to coefficients within the component constraints. See

I was in high school in the early '60s. I recall making several trips to a surplus store in Boston (don't remember the name) to gather parts for my senior science fair project. The most memorable

There was also Electro-Craft on Dorchester Ave (in Dorchester). Tons of NIB ARC-5 Receivers and Transmitters. 73, Dick, W1KSZ "Dahchester" Boy, 1940-1966 ________________________________ Sent: Monday,

tekscopegroup@... wrote on 11/30/2020 12:28 PM: <snip> Hello-- Sometime in the early 1960 , my roommate and I hitchhiked from Boston to his home near Suffern, NY-- his goal was to see his girl

I like the definition Bruce cited because it would include such things.

Probably the old equipment was designed to be insensitive to exact values of carbon comp resistors.? Kudos to the designers for robust designs.Jim Ford?Sent from my Verizon, Samsung Galaxy

Yeah, the "tap-dance of relays adjusting circuits" still occurs these days, for example in spectrum analyzers doing auto alignments.? They sense when you're in the middle of a critical measurement

Ed, Thanks for the suggestions! I will dig a bit further into the box when I can get to it - it's sitting behind several large boxes of stuff. Steve H. [email protected]> wrote:

Steve, the digital circuitry in the bigger Comdyna box could be there for a number of reasons. By the end of the analog computer era, digital stuff - computing and otherwise - had already been around

You could always send the payment as a purchase and add the 3% PayPal fee if Dennis will allow that....

Well, there were people called "computers". If you've seen the film "Hidden Figures" the women who did the various calculations of orbital parameters and trajectories were referred to as "computers"

That's good information Menahem. Thanks for posting it. I'll just add that I have a large number of 40-ish year old Allen Bradley carbon comp resisters, many of them still in the factory sealed

Harvey White wrote... "See if you can find the SF novel "Venus Equilateral" by George O. Smith.? Pay attention to the electronics and computing part if you would, which shows (amongst other things)

Sorry Dennis but I'm going to have to cancel my order for two copies of Peter's CRT book. I'm a LONG time Pay-Pal user but due to a combination of reasons; you, PayPal, and my credit union have made

If you search through the Tektronix Common Design Parts catalog dated October 1982 (http://w140.com/tekwiki/wiki/Common_Design_Parts_Catalogs) you will find that these two parts have many part number

From the past.....City College of New York, Terman Engineering bldg ...1964..1971: Digital computer was an IBM 360, a huge room in the basement. My last attempt at software keypunching Fortran

Several years ago my wife and I were returning home from Florida through the panhandle.? We saw signs for the USS Alabama which is anchored in Mobile Bay and decided to detour and visit the ship. i

Good catch! Shortly after I joined the group, someone here admonished me that when you hear hooves, think horses before zebras. For me this means e.g. to look at mechanical components before