20 years ago - VHF receiver of trash

"Disassemble mezzanine» © among boxes of obsolete computer junk, found it a miracle of scientific and technical creativity of the era of the collapse of the socialist economy.
Let me explain, why do I have to do meaningless from the standpoint of the present Project.
In the early '90s, the music I have been in short supply, in order to listen to something new had to carry a tape recording in a cooperative stall and wait for a few days. And suddenly, I find out that the radio has two radio stations - "Europa Plus Moscow" and "M Radio" broadcast in the UHF band.
The trouble was that in Soviet times in the UHF band had absolutely nothing to listen and buy the appropriate hurdy-gurdy had no meaning. By the time she began broadcasting to buy any of the electronics has been extremely problematic. Counters Radio Shack completely emptied well before that time.
Then I thought, why not to build a VHF priemnichek, not for nothing that they say - necessity is the mother of invention? Of course, that is to develop a circuit is etched by ferric chloride and look for parts of speech could not have been. He had to do something quickly in a modular pre-engineered, the benefit of every kind of stuff in my childhood there enough.



The unit is packaged in a box from under the old modem.



That's actually a he - worn with a broken antenna, it has been lost in the operation.



The basis of all the basics - housing, it was originally a design soundlights "Spark" or something like "Prometheus", then a lot more than and eventually lay idle. It was cut a hole for installation of a speaker grille on the tape, "Electronics", made a new front panel mounted fuse and a connector for connecting to a stereo system.



Transformer, apparently from some very crafty instrument for defense purposes, according to the class of protection, capable of operating in a nuclear winter. From an unimaginable amount of stress issued dozens windings able to find something suitable for civilian use. Most importantly it had the advantage that it is a wound core and accordingly worked silently.



Power was collected from children's designer purchased once only because the entrance to the notorious set of chips K174UN7. Burn this chip, used in almost all the tape recorders, it was a matter of principle for many Soviet music fans, who lived next door to each other.



Block switching channels on the TV was from a portable "Youth", he oddly perfect fit for configuration management varicaps frequency RF module.



Power supply from the Department nekonditsiyu cult Radio Shack in Shabolovka why I bought it I do not remember, probably, to repair, yet he waited in the wings.

For the interest of the receiver decided to include in the network, but it was not so easy - plug does not fit into the current sockets. We had to make an adapter and it turned out - running like new. I knew how the people used to make radio electronics!





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