[MRCA] Seventies Technology

[J. Forster]

The 1970s & 1980s were pretty much the Golden Age of electronics. By this
I mean the instruments had reached a level of complexity to be really
useful, but not progressed so far as to be unrepairable, because of ASIC.
Stuff was built to last.

Just look at the instruments from that era still in service.

Also, if you think about it, most of the needed features existed by then:

Very capable, easy to use, stable 'scopes were common.
SAs had YIG preselectors and Storage Normalizers.
VNAs existed and had normallizing fearures.
Synthesized generators were available.
Practical sampling and TDRs were available.
Many instruments had GPIB
Most gear was solid state, so little routine maintenance/cal.


Some of these instruments were truly revolutionary. Most all since have
been merely improvements on that stuff.

YMMV,

-John

=================







> The Voyagers also lasted quite a while, and of course all these WWII
> radios
> that just keep on going are impressive.
>
> A piece of gear I worked with that was way beyond its design life was the
> 300-foot radio telescope at Green Bank, WV which was built to do a 1-2
> year
> survey of the sky.  .  It was less than 2 years from concept to completion
> but did world-class science for 26 years before it collapsed in 1988, only
> a few years after I was messing with it.  (I didn't do it, honest!  I was
> working on feedpoint antennas, not structural stuff)
>
> For milsurplus tie-in, see another long-lived telescope at Green Bank, run
> by the Navy, which contributes to measuring what a day is.  The original
> dishes were built from kits around the same time as the 300-foot.
>
> https://public.nrao.edu/telescopes/historic/green-bank-interferometer.
>
> RF
>
> Ray wrote:
> Back in 1978 NASA did the ISEE-3 program to study charged particles and
> the
> effects of solar wind and later used the satellite to do fly by Halley's
> Comet in 86 and finally study Coronal ejections with the program being
> shut
> down in 1997, apparently the satellites final orbit will bring it back
> around the earth later this year and NASA is allowing a private group, the
> ISEE-3 Reboot Project to attempt to control the satellite, NASA has no
> funding or interest apparently. It's amazing to see that something built
> that long ago and subject to the worst environmental conditions imaginable
> may  still be capable of operation, downlink of the main transmitter has
> been detected so some systems must still be operational.
> You can see more about this at:   http://spacecollege.org/
>
> Ray F/KA3EKH
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