View allAll Photos Tagged Germanium
Beautiful combination of colors in this receiver, very typical of the 70's, and a long vinyl strap for carry on the shoulder. The chassis has a combination of germanium (2x audio output) and silicon (4x Converter, IF and Audio Preamp) transistors, powered by two 1.5V AA size batteries.
Thermal image of a domestic absorption refrigerator. Image made with a Therm-App Pro 640 x 480 thermal camera, ThermViewer software. Stitched from several images in Microsoft Image Composite Editor.
Uncalibrated image; blue indicates relatively cold (~room temperature); red is hottest (in this instance 'very hot to the touch of one's hand but not quite burning'). Image intended to show the general distribution of temperatures in the working sections of the refrigerator.
This image is used on Wikipedia.
This image is released to the public domain, although if you re-use it I would appreciate a credit to 'Ultrapurple' and possibly a link to this Flickr page.
boston, massachusetts
1960s
teradyne automatic germanium diode test set d133
teradyne was founded in 1960 by alex d'arbeloff and nick dewolf. more information available here: en.wikipedia.org/wiki/Teradyne
part of an archival project, featuring the photographs of nick dewolf
© the Nick DeWolf Foundation
Image-use requests are welcome via flickrmail or nickdewolfphotoarchive [at] gmail [dot] com
Very small germanium radio that looks like table top tube receptor, in fact in the ivory one, I put a ½ watt carbon resistor to compare dimensions. Indeed it is very similar to the Model GR-10, only with some differences in the front face, but sharing the same circuit and accessories, however I coud not find references on the web.
It seems that were highly popular herein in México City, because I have found it in different colors: blue, red, green and ivory; unfortunately by being aimed at children, it is difficult to find them in good condition and with their complete accessories.
The circuit is tuned with a ferrite slug that is driven by a clever rack and pinion mechanism. The crystal earpiece is CROWN RC-300, and the antenna cable plug is engraved with Japanese pictograps to indicate two choices for connecting the coil.
Tung-Sol germanium transistor from 1958.
Tung-Sol were an early and major automotive supplier of bulbs and the developer of the first headlamps, split high/low beam bulbs and the flashing turn signal. They also produced renowned audio tubes (valves). Tung-Sol had 6 factories in New Jersey and Pennsylvania, their HQ being on Eight Ave in Newark. Like many pre-eminent tube makers they established a semiconductor facility; in the mid 1950s on N Arlington Ave in East Orange NJ.
Tung-Sol were acquired by Studebaker in 1967.
This is not my radio or photograph. It is from an e-Bay auction which ended on April 26, 2023. A very similar transistor version of this radio was also made, model TR-125-A.
Operator: RCJ LINES, INC.
Fare Class: Regular Air Conditioned
Type of Operation: Provincial Operation
Brand: MAN Trucks & Buses
Layout: Rear-Engine
Chassis: PBM-A55(MAN 18.310 HOCL)
Engine: D2866LOH27
Transmission: 1-6 + R Manual Transmission
Body: MAN Lion's Coach(Das Germanium)
Suspension: Air Suspension
Seat Config.: 2x2
Total Pass.: 49
Note: SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUR PRIOR NOTICE
Special Thanks To AntokinAmpog
Nice radio with metal/ plastic combination on the front and black cabinet.
The chassis has eight transistors: four of germanium in the AF amplification stages; and three very small silicon wafer type in RF/IF stages. I have seen these small silicon transistors in audio stages of the MICRONIC RUBY sets.
Upcoming project: I will be building an old English style crystal set for AM/Shortwave/Longwave. The set will be housed in a wooden box with a lid with lock and key. It will have a signal strength meter. The dials and meter will be mounted on a sheet of black acrylic (can't find phenolic sheets at an affordable price). The circuit will employ the Australian "Mystery" design because it's easy enough to be built as an oat-box crystal radio while giving high quality performance (it's called a "Mystery Set" because no one knows why it works; the design defies the laws of circuitry and yet outperforms many crystal set designs). The detector will be a 1N34A germanium diode; the pyrite detector is a dummy for looks only. I plan to use it as an AM/SW/LW tuner with my hi-fi set.
UPDATE: See www.flickr.com/photos/14275763@N08/25747832566 for schematic diagram.
The sales receipt with this radio indicates it was purchased from Breck's of Boston on July 30, 1965 for $1.98.
This little germanium radio looks like big tube receiver, also the metal cover dial is beautifully painted and engraved. It came with alligator clips for ground/antenna and magnetic earphone.
The circuit still retains the original crystal diode, which unfortunately is no longer functional, coil and simple mechanism for tuning.
Four thermal images of the Fujifilm IS PRO made using a Therm-App thermal imager with 19mm germanium lens.
The IS PRO had a Domiplan 50mm f2.8 with a lens hood and Baader U (Venus) filter taped to it - not that affects the thermal image in any way...
Apologies to Andy Warhol.
This is, of course, a composite shot of four images. Each was made separately, using one of four different palettes built into the Therm-App software. IMHO the monochrome image gives the best spatial resolution, as is usually the case. The next best, I reckon, is the Iron palette, top left, but these don't have the visual impact of the other two.
I'm actually quite impressed that the 19mm lens on the Therm-App managed just the right depth of field to capture the camera and lens in pretty good focus and throw the background into a fairly flat bokeh. Now there's a thing - considering the bokeh of a thermal image...
Comments are warmly welcomed.
For more thermal images covering a diverse range of subjects please visit (and join!) the Therm-App (and others) thermal imaging group at www.flickr.com/groups/therm-app-users/
Sometimes, fortune smiles.
Making our way on a 400 mile journey down the motorway, the car computer beeped and said it had detected severe congestion ahead. We accepted its suggested diversion and ended up driving past a park where a hot air balloon was preparing to lift off. There was easy access and good parking so I stopped, pulled out my Therm-App thermal imager and fulfilled one of my ambitions - getting some close-up images of a hot air balloon!
Lift-off was imminent so there wasn't time for any finesse (or to take any video) but the place I happened to park was pretty well perfect, with an unobstructed view at just the right distance for the Therm-App 13mm f/1.0 germanium lens to work at its frame-filling best.
There wasn't even time to get out a stills camera. Just three minutes and thirteen seconds elapsed between me getting out of the car and the last take-off shot. In that time I took 56 thermal images, swapping palettes and adjusting temperature settings at breakneck speed. I'm glad ThermAppPlus is so easy to use!
The small visible-light image was actually taken from my car dashcam, hence the poor quality. The thermal images were taken from the other side of the balloon. Perhaps you can just see the white blobs of parked cars in the visible image - that's where I parked, too.
This was one diversion that brought a truly unexpected bonus.
Comments are warmly welcomed.
Gold on Germanium
Courtesy of Dr. Benedykt R. Jany
Image Details
Instrument used: Quanta 3D
Horizontal Field Width: 2.98μm
Nice lacquered and polyester coated wood cabinet with aluminum handle and faceplate with simple graphic. The chassis has seven transistors: four of silicon for the conversion and intermediate frequency stages; and three of germanium for audio amplification stages.
It is powered by 120 VAC or four "D" batteries.
Finally, here's the Big Muff board with Germanium AC-130 transistors in Q2 (hFE 291) and Q3 (hFE 288). SO awesome. Indiana Jackson and the Temple of Awesome.
BTW, this is the Ultrastoner board from Grind Customs FX. With the plain ol' 2N5088 set it was already the kind of Big Muff you dream of owning. Very nice board. This germanium-sandwich configuration is kind of appealing, too.
Q1 is an Input Booster and Q4 is an Output Booster, so they mitigate any bizarre behavior that might occur at Q2 and Q3, which are the Clipping Amplifier stages. Even then, Q2-3 have Emitter and Feedback resistors and Miller capacitors to help assure stability. So the insanely over-designed nature of the Big Muff makes bad ideas like this less problematic.
Beautiful Germanium Radio in very good condition, it seems never used, with cardboard box on whose sides are printed instructions and recommendations for use, as well as a Reception Range table.
The wooden doll with her baby is apparently hand-painted and covered with a layer of shiny lacquer, has two crystal earphones and antenna cable with metal tip. Tuning stations is carried out by turning the doll head.
I love the details that used to be used in this vintage technology, such as the Miniman stamp with the spaceship on the headphones and on the metal tip of the antenna.
Geranium. District population 83.
The Hundred of Price was declared in 1906 and the town for the Hundred was to be Geranium. Its location was based around a government bore sunk in 1897 for future farmers on a site of a water soak known to the Ngarkat people. The district was surveyed in 1906 after the rail line had been completed but the first town lots did not sell in the newly surveyed town of germanium until 1910. It was named after the wild geraniums of the district.
From its beginnings in 1910 Mallee stumps and roots were railed back to Adelaide from Geranium and elsewhere. Eudunda Farmers had a weighbridge installed at Geranium in 1911, the same year that they opened a General Store in the town. It was the 10th Eudunda Farmers Store in SA on the corner of Railway Terrace and Price Street. The first settlers included a mix of English and German background families. Apart from new disease resistant wheat varieties a lot of oaten hay was grown in the district. This was still the era when farmers had teams of six to twelve draft horses to pull the Mallee rollers and wheat ploughs and harvesters. Some areas were lucky enough to have tea tree suitable for the brush fences of Adelaide suburban houses! As the town emerged a school opened in 1912; Methodist Church services began in 1910 in the Institute; the timber framed Methodist Church opened in 1954; an Anglican Church was built south of the railway line in 1968. The Anglican Church is now the Post Office. A galvanised iron Institute for community social functions was quickly put up in 1909 with a new solid stone replacement Institute opening in May 1922. It was built in front of the old iron hall which was demolished in 1952. The stone Institute was demolished in 2006 but it used to stand opposite the current memorial cairn on Railway Terrace next to the original Eudunda farmers store. The Geranium Area School catering for high school students opened in 1965 with 247 pupils. Geranium only just survives as a town. The school was downgraded from an Area school to a primary school in 1990 and now it is closed despite two large classroom blocks and other facilities. It closed in 2022. Students can be bussed to Lameroo Area School. Some years ago when the general store was put on the market and no buyer could be found the town bought the store and operated it as a community store. This store was the second store built for Eudunda Farmers in 1963. It is now permanently closed. The 2021 census recorded 83 residents for the town. Although Geranium is a 20th century town it had a number of structures on the Register of the National Estate including the 1922 Institute and the railway station site and the town bore sunk in 1906 - but these buildings are now gone.
Thermography of my cats.
Wavelength: 8 to 14 micrometer,
Sensor: Microbolometer 320x240,
Lens: Germanium triplet
For those who are not browsing the Thermography set:
See more at : www.flickr.com/photos/yellowcloud/sets/72157628079313321/
Getting really nice pictures from my 60mm or so thermal imaging combo.
The big lens is an all-germanium keplerian telescope of 3x power, so it basically turns the 13mm lens into 40mm and the 19mm into 60mm (give or take the odd mm). The latter is equivalent to a 300mm zoom on a standard 35mm camera - a magnification not to be sniffed at. The telescope has a decently large aperture (details not currently known) so it produces reasonably 'bright' images. The only 'problem' is that as it's a keplerian design, the image is inverted. But given the size and weight of the lens there's no way I'd be trying to mount it on the front of the Therm-App like a regular lens, so all I have to do is mount the imager upside down.
I had to adapt the telescope to the Therm-App. My initial solution comprises a carefully chosen discarded water bottle, some duct tape and three rubber bands. I'm sure I'll find a stronger, more elegant method soon. More information will follow.
Comments are warmly invited.
For more thermal images covering a diverse range of subjects please visit (and join!) the Therm-App (and others) thermal imaging group at www.flickr.com/groups/therm-app-users/
Oval-shaped cabinet with vinyl strap and tuner knob that moves around the right side pointing to a graduated scale in meters instead of Kc.
The chassis has a five transistor (three of silicon and two of germanium) superheterodyne circuit, powered by three "AA" batteries.
My soldering workbench, with just a few of my favorite toys.
Note the new recycled acrylic shelf holding up the cabinets of little drawers. Read more about how that was made here.
Scavenger hunt fans: Can you find...
- Fractals
- 5 W LED
- Germanium
- Larson scanner circuit board
- Iron filings
- +/- 15 V power supply
- 555s
- ZIF sockets
- Solder wick (3 locations)
- Razor blades
- Raspberry candies
- Jameco grab bag of trim pots
- Resistors on tape
- Circuit diagram
- Misfiled drawer of resistors
- Bits of solid wire
- Peltier junction devices
- Diagonal clippers
- Solder water
Cabinet in square shape with aluminium carry handle and cardboard back cover. The acrylic plate covering the dial scale is painted on the reverse side, this being the only model I know of this brand that uses this technique. The chassis has six germanium transistors, connection for external aerial anntena and powered by three "D" batteries.
National Mexicana, S.A., was founded in 1967 by Matsushita Electric of Japan and the mexican Grupo Industrial Guindi (later KINDY), locating the manufacturing plant in 22 Toluca Boulevard, Naucalpan de Juárez, Estado de Mexico. At the end 60´s and during 70´s National Mexicana, S.A., manufactured several models, from pocket to table top radios and some with turntable.
radiograph of HPGe gamma spectrometer (left), airplane altimeter, spinthariscope, magic marbles (on glass beaker).
Very small germanium radio that looks like table top tube receptor, in fact in the ivory one, I put a ½ watt carbon resistor to compare dimensions. Indeed it is very similar to the Model GR-10, only with some differences in the front face, but sharing the same circuit and accessories, however I coud not find references on the web.
It seems that were highly popular herein in México City, because I have found it in different colors: blue, red, green and ivory; unfortunately by being aimed at children, it is difficult to find them in good condition and with their complete accessories.
The circuit is tuned with a ferrite slug that is driven by a clever rack and pinion mechanism. The crystal earpiece is CROWN RC-300, and the antenna cable plug is engraved with Japanese pictograps to indicate two choices for connecting the coil.
Germanium alloy junction transistor based card from the early 1960s. The 2N404 became the workhorse switching transistor of the computer industry, produced by a number of companies including RCA, GE, TI and Raytheon. Despite advances in silicon, mesa and planar structures, demand for germanium alloy junction transistors continued throughout the 1960s and beyond.
This card also has eight Hughes Aircraft HG1012 germanium point contact diodes. HG signified Hughes Glenrothes, so these were UK manufactured. Interestingly the site that manufactured these diodes in the 1960s is now a working Raytheon facility.
Gold on Germanium
Courtesy of Dr. Benedykt R. Jany
Image Details
Instrument used: Quanta 3D
Horizontal Field Width: 2.98μm
This radio is an absolute design classic, a Bush TR82C, new in 1961. It also has a local connection having been sold new by Taylor's music shop on Bridge Street in Walsall.
This set is in full working order, and is of a design that remained popular through the valve and transistor eras. The style was recently revived and lives on in DAB radios.
To accompany this immaculate radio I also have the original combined warranty and instruction card, showing when and where it was purchased.
If you look closely at the capacitor in the centre which is orange coloured, you will notice it is dated February 1961.
The black transistor at the bottom of the image is a Mullard OC71. This all glass Germanium PNP transistor was used in the amplification and output stages of audio equipment. Even today transistors from the Mullard OC range are a regular feature on eBay as they produce warmer and higher quality sound than more recent silicon components.
The guts of my Maestro Fuzz-Tone FZ-1, made in 1962. I also have an FZ-1A. from 1966. Ironically, the FZ-1A sounds much more like "Satisfaction".
Also note the HUGE Germanium transistors.
If you didn't know, the Maestro Fuzz-Tone was the first transistorized guitar effect.