I thought it’s obvious that OP made a typo, it happens especially for russian tech where МГц and мГц are written almost the same, despite different meaning. So you figure out from the context.
You’re too young to get it. (LE i’m not saying this in an offensive way, it’s just that nowadays the universal language in electronics is english but like 30 years ago it wasn’t the only one. I repaired lots of oscilloscopes and eastern europe equipment and it was really an adventure to follow signals accross schematics written in cyrillics…)
Young? A) my friend it was a joke B) are you European? Cause I was using lab equipment from the 60s on up in undergrad and never came across Cyrillic. Japanese was not uncommon, but in the US Russian lab equipment was virtually unheard of.
Hey American bro, thanks for the comment. Sure I get it was a joke, but the image and comment/joke reminded me this interesting topic which nowadays is unheard of. The sampling technology is mature and having GHz frontends for a few dollars is so common that we rarely wonder how it was in the analog age.
Yes I live in Eastern europe. CRTs were not our strong point, actually tubes were made only in a few countries such as Czechoslovakia, East Germany and most of them, USSR. The equipment in universities, army, research laboratories, schools were from all over the east block, and very few institutions had western equipment. For example you would be very lucky to work with a Tektornix, which felt like a Ferrari compared to your usual junk. Japanese equipment was really unheard of. My country barely had the know-how to build decent consumer electronics such as radios and TV sets and they were using the same technology to build measurement equipment. Of course it was shit, impossible to calibrate, knobs were breaking and falling off, transformers were shorting, connectors were interrupting, even the vias in the PCBs were breaking, leading to time wasting repairs. The soviet ones were considerably better, and the one posted in this thread is actually one of the best, probably a Tektronix 465 wannabe: high frequency, dual time base, large CRT.
Once the soviet block fell at the end of the 90s, the industry fell together with it, due to the very uncompetitive products wrt to the west. Therefore lot of stuff was being scrapped and as a hobbyist in the 90s, if you knew someone working in the industry, you could get some fancy equipment for personal use. The broken ones were cheaper, but having the schematics, a repair was feasible. Early internet with .djvu archives with schematics and datasheets was really helping a lot.
Mostly acid etched that’s right, I have no clue how the vias were done. They were either breaking inside the hole or very close to the pad, a break so thin that you could barely see. Different thermal expansion if you ask me, but not sure. Just filled them with solder so they were fixed for good.
Yeah that's what I was wondering. I guess at some point your first troubleshooting step was to just go solder the vias.
Man we have came a long way from the first pcb I designed, which was single layer, acid etched. To pcbway/jlcbpcb. It's wild how fast they turn them around, the cost (unless I buy a lot of them it's almost always more expensive to ship them), and the quality. They are just fantastic. I don't know that it will ever make sense to have an "ender 3" level of hobbyist pcb maker. If for no other reason the chemicals involved.
23
u/[deleted] 17d ago edited 17d ago
I thought it’s obvious that OP made a typo, it happens especially for russian tech where МГц and мГц are written almost the same, despite different meaning. So you figure out from the context.
You’re too young to get it. (LE i’m not saying this in an offensive way, it’s just that nowadays the universal language in electronics is english but like 30 years ago it wasn’t the only one. I repaired lots of oscilloscopes and eastern europe equipment and it was really an adventure to follow signals accross schematics written in cyrillics…)