Questions tagged [vintage]
For the question about Early/ old kind of electrical technologies that are no longer available today, or almost extinct.
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Can anyone identify this vintage 42 pin IC and the company logo?
The 42-pin chip is labeled as an LC6064 3090 6m2. I am unable to identify it or the company logo. Anyone recognize this?
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Can anyone help identify this piece of equipment?
My father—in-law was an electrical engineer and had a great collection of audio and electronic equipment. I’m not sure what this is. Can anyone help?
It has a cable with 3 connectors on one end that ...
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Identify vintage automotive connectors
These connectors are from a Ford/Philco electronics unit circa early 1970s. White and blue are male and green is female. Pin pitch is 0.2".
Any ideas for part numbers of modern equivalents that ...
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Identify old component
I am reverse engineering a circuit board from the early 1970s. Ford FoMoCo/Philco design. It has a metal box with six terminals. Any ideas what this is?
It measures 42x30x19mm.
The ground terminal is ...
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What is my next step to debugging an old NTSC video generator circuit that doesn't sync?
I know this is somewhat broad but I hope it's appropriate here. I have a 1970s PCB that is designed to output a sort of bitmap video image via a standard NTSC signal. It came to me as a half-built kit ...
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Vintage dual 0.25 inch plug connector - Does this have a name or a typical use case?
I found several of this type of connector in an estate, and just wondering if anyone knows if this type of connector has a particular name, or what they are typically used for.
The writing says "...
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Diode AM detector linearity
Most valve radios use a vacuum tube diode as a detector. Over the decades, I have used germanium diodes with good apparent performance. In other words, cheap equipment sounds good when the germanium ...
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Replacing 1960s Motor Capacitor - Vintage Sewing Machine
I'm restoring a 1960s sewing machine (a Necchi Lydia 544, pure italian-made robustness). Inside of the foot pedal a capacitor is completely dead (gets hot and fume). I'm confident into changing it, ...
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Is there a way to "indirectly" measure the position of a variable capacitor?
I am modifying the insides of a vintage radio. I wish to avoid damaging it or changing it as much as practical.
Here is the insides of the radio in question:
A primary goal is to measure the position ...
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Identifying a vintage capacitor
This is inside an Allen Wales (Model 9E) adding machine. It was manufactured in the late 30s or maybe sometime in the 40s from what I've read. There are notes from a technician scratched on the inside ...
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What is the chemical compound leftover on vintage 80s/90s PCBs with their distinctive characteristic smell?
Most people know the smell of vintage/ancient electronics. There a lot of questions about this smell on forums, but nobody explains what the cause actually is or what the chemical formulation of this ...
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Replacing BJT with MOSFET in a vintage engine ignition circuit
Many moons ago I have recreated the schematic of a vintage Bosch ignition circuit, and confirmed it's working as expected with two prototypes (one can be seen here: https://www.youtube.com/watch?v=...
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Voltage output on thyratron gas tube relaxation oscillator VCO?
I know that thyratron gas tubes can be used to make a sawtooth like relaxation oscillator:
My question is for a modification of this same circuit that makes it act like a voltage controlled ...
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Is this resistor manufactured by Piher?
I am attempting to determine if this resistor was made by Piher or not.
The red color and glossy finish makes me think it was, however almost all the other Piher resistors I have seen have a different ...
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Is this resistor metal film or carbon film?
I am trying to determine if this resistor is metal or carbon film?
Traditionally most of the metal film resistors I've seen have been blue, while most of the carbon film I've seen have been light ...
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Identify Vintage Power Cord for Sears Electric Tray
I found this vintage Sears electric warming tray but it's missing a power cord. I tried a 2 prong figure 8 cord but the holes were too close together or too small to fit. Here are pictures of the tray,...
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Frequency marking on 1960s radio crystal
I found several of these old radio crystals, but they do not seem to have the frequency clearly marked, which I found unusual.
Most other ones I have seen have a model number (e.g. CR-18/U) and the ...
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Is there a name for this vintage 3-pin connector configuration?
I am trying to find a suitable replacement for this connector for a vintage radio, but I'm not sure how to search for it or if they even sell them anymore.
Simply "3 pin male connector" isn'...
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Feedthrough capacitor measured with an ohmmeter
I'm trying to fix a Motorola 8 track player model Quadraline TM912, and I came across this component which was new to me, the so called feedthrough capacitor. On the image above, if the fuse E6 is not ...
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Identify this type of diode from the 1970s (1.3V forward)?
I am currently reverse engineering the electronics of a Pentax Electro Spotmatic camera from the early 1970s. I have the circuit mostly figured out but now I want to find out more about the particular ...
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Is there a name for this 24-pin vintage Howard Jones connector?
Is there a name for this pin layout or style of 24-pin connector?
This is a Howard Jones-style connector, circa 1950s I believe?
I know similar ones are used for vintage radios, but the layout and how ...
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What is the name for this connector socket pin configuration?
Does anyone recognize this female socket pin layout as a standard design of any kind?
I was looking at 5-pin CB Radio Microphone sockets, and they are similar, but not the same layout.
Also, the ones ...
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How do I clean a badly corroded, jammed rotary switch with 12 position and 4 decks?
The 12-position 4-decked rotary switch on this Roland Re-201 dating back to the '70s or the '80s is completely stuck and won't move at all due to corrosion. The wafers on it's decks seem phenolic.
The ...
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Restoring and operating a temperature gauge from the Soviet space shuttle Buran
After the Soviet Buran (БУРАН) program was suspended in the late 1980s, the Buran space shuttle was housed in a hangar at Baikonur. That hanger unfortunately collapsed due to structural failure in ...
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Replacing vintage 3 leg capacitor
So I have this old capacitor from a Sunbeam Mixmaster (model 9B). It has three legs, and no markings that I can use to determine its value. On the case is
Ducon capacitor Pat. No pn441 250v AC MX197c
...
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Flaxseed oil as insulating oil for wires
I've bought clothed wires which look like vintage wires found in old audio equipment. I was expecting they are 'oiled' or waxed but they visually didn't. Now I got flaxseed oil and olive oil available ...
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Where to buy fancy/cool looking toggle switches [closed]
I wanted to know if anyone knows where to buy old, vintage style toggle switches like in the example photos. I have searched for toggle switches, and I have never found anything that looks remotely ...
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Can you help me identify this manufacturer's logo on this component
Stylized S logo that I cannot find any information on. The model of this stud mount diode is 240E10RTC. It measures 45 mm in width has 20 mm threaded end
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Macintosh Classic video input
I want to modify or rebuild the video amplifier circuit of the Macintosh Classic so that it accepts 8 bit grayscale input. Original circuit accepts 1 bit 5V P-P video signal. First idea was just to ...
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Identify vintage capacitor
What is this component? Words on it say something like:
DUIULER
0.1 ? +- 23%
250V 50~ WKG
TL
Where the "?" is a literal blob of ink that could be ...
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Why do old ICs especially CPUs have golden caps and bottom lids?
What was the advantage of having a golden heat spreader and bottom lid ?
Contacts make sense because of the electrical properties. This is still done today.
But what were the effects of using gold ...
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Help me identify this connector please!
this is the only connection on a vintage turntable I came across. what is it?
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What is this obsolete (?) video screw connector called?
Found on the rear of an old (1970s) Sanyo monitor. It's not standard cable/co-ax, it's larger and beefier. It's used here for a composite signal.
Thanks for any pointers.
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Why am I seeing -5 V or lower on the output pins reading an Intel 1702A EPROM?
I am building a breadboard/Arduino reader to dump the data on a very old Intel 1702A EPROM chip. (data sheet) When doing some basic testing by tying all the address pins to ground, I am seeing ...
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How to generate +5 V and -9 V voltages to read an Intel 1702A EPROM via Arduino?
I have some simple experience with TTL logic and Arduino, but I'm only a hobbyist and am bit stymied by my current project, which is attempting to read the data from an old Intel 1702A EPROM. The ...
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Identifying missing component from vintage synthesizer [closed]
I acquired a Hillwood C-1A synthesizer with a burnt circuit board with 3 empty holes where a part needs to go. I'd like to repair the board but I don't know what component to look for... Help?
The ...
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What is this component? 1970s electronics
I broke it while trying to repair a nearby component on a 1970s board. It has two wires at one end that look like they are going to a coil and two axial wires. One of the axial wires came out with ...
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Need help identifying antique porcelain fuse block
This is an antique 30 amp porcelain fuse block from a house, built before electricity, that was first wired around 1900. I would like to identify the manufacturer and the year of manufacture of this ...
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Positive Grid current in valves
Vacuum tubes are much more idiotproof than transistors. Grid current does flow during a significant part of the drive cycle in some classes of amplifier operation. Many high power tubes have really ...
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I need help identifying a vintage battery
I found what looks like an old battery in the middle of nowhere. The plates are thick and soldered by hand. There is a matting between the plates like an AGM or maybe nickel iron battery. It's housed ...
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Powering an old TI Silent 707 with a missing external AC/AC adapter
I just got my hands on a TI Silent 700 model 707, but it's missing the external power transformer. Unlike similar Silent 700 models, this features an optional battery pack which complicates things ...
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What is a modern 2SD669 transistor replacement?
I have an old Nad 302 integrated amp where one of the 2SD669 transistors is blown. I can't find any suggestion on modern replacements. I am a software engineer and analog circuits are a bit out of my ...
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Snap in capacitor in place of through hole
I have an old Technics SU-V5 amplifier from 1980. It has through hole capacitors with very thin legs. All new capacitors are snap in and their legs are very thick. They won't fit in the PCB. How ...
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Can anyone help identify this mystery integrated circuit?
These were in a box belonging to my grandfather.
I don't know if it's relevant, but he worked at a navy yard. I'm guessing they're around 50 years old. Nothing comes up on google search.
I don't know ...
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Soft errors from SEUs/SETs in early 8-bit microprocessors?
Why is it that soft errors due to single-event upsets/transients never seemed to be a problem in early 8-bit microprocessors, like the MOS 6502 or the Zilog Z80? The microprocessors themselves were ...
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'P.V.' marking on 1940's electrolytic capacitors
I am replacing the paper and wax capacitors in a tube radio of 1949 vintage. Puzzled by the initials P.V. where I'd expect to read VAC or VDC. Can anyone explain this puzzling jargon?
For some reason ...
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Identifying a vintage lighting sequencer method
In India, on certain social festivals like Durga Puja, Kali puja etc, lighting decorations are done around roads etc, where various themes or stories are animated (such as stories from Aesop's fables),...
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Can this WWII era rheostat be modified to dim an LED bulb?
I have a WWII era RAF chart-board lamp in perfect unused condition. I want to use an LED bulb with the original dimmer as tungsten runs so hot. I want to avoid rewiring or bypassing the dimmer as the ...
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MRC Variac+ -- NEED HELP identifying this antique electronic
I gather, so far, that there is a variac component to this equipment. And that it was manufactured by the MRC Manufacturing Corporation (a Subsidiary of Materials Research Corporation), which once ...
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Need Clarification on Choke Placement (Vintage PS)
I came into possession of an old Electro D-612T variable DC power supply. Based on what I've read here and other places it was manufactured in the 1950s, and sold for a whopping $39.95 US at Radio ...
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