Sabtu, 21 Juli 2012

Kenwood KD-600 Turntable What's Inside

Just took apart a Kenwood KD-600 quartz phase locked direct drive turntable,  It is a well built turntable, except for a weakness in the choice of a fibre board for the base cover which wear out with age.

The electronics are still in good condition. The motor turns nicely. But the speed at 33 RPM cannot be locked.

The electronics requires a regulated +15VDC and a unregulated +25VDC input fed via the 3 terminal connector.

Kamis, 19 Juli 2012

Inside The Vitacon Thyristor 828S Camera Flash

Here is the Vitacon camera flash disassembled. A pretty sophisticated design with multiple thyristor controls, use to quench the flash and trigger the flash. Need 4 AA size battery giving 6 volts. A powerful camera flash gun. This is probably obsolete now with LED camera flash and low light digital camera and video cameras.

Vitacon Thyristor 828S Camera Flash

1990s 1 Megapixel Digital Camera Webcam Obrite

This is an early 1990s digital camera made by Obrite, a relatively unknown brand. Consumer electronics has became a commodity such that anyone with enough cash can get a electronics contract manufacturer to make any thing they like and stick their own brand on it.

This camera is about 1 Mega pixels organised as 640 x 360 pixels. It has a USB connection and needs 2 AA size battery for operation. When connected to the PC using the USB it doubles up as a web cam.

Here is some pictures of the inside components of the digital camera.

Obrite 1 Megapixel Digital Camera And Webcam.

Kamis, 12 Juli 2012

Make In Singapore AC 230V TO 15 V AC Step Down Power Transformer

A Made In Singapore AC low voltage power transformer. This is typical of the early industrialisation SME manufacturing in Singapore in the 1970s and 1980s. These transformers are probably made for local consumption in the building industry, the local factories and offices powering equipment like PA system, fire alarms, smoke detectors etc.

This transformer meets just basic electrical safety standards. The AC high voltage 230VAC winding is wound on the same bobbin as the low voltage AC and is insulated from it by heavy wax paper. Tighter safety regulations like UL electrical standards will requires the two windings to be separated on different halves of the plastic bobbin.

I have decided to srape it and recover the copper and iron. This produces about 300 grams of copper wire and almost 700 grams of scrap iron.

I recover about 300 grams of scrap copper  wire from
this ac transformer.

Add caption

Selasa, 24 April 2012

Brennenstuhl Premium PROTECT-Line Power Line Telephone Line Surge Proctector

What you should find in a good surge protector for your AC power and telephone and internet connections.
Features of the Brennenstuhl Premium PROTECT-Line Power Line Telephone Line Surge Proctector

1. Cable well for housing excessively long lead.
2. High quality mains leads at least 3 meter long and 3 x 1.5mm crossection.
3. High capacity metal oxide varistors with fast response.
4. Automatic 16A circuit breaker.
5. Overvoltage protection display.
6 Thermal secruity system monitors all varistor to cut off in time.
7. Protect 230V mains connection.
8. Two pole mains switch with integrated indicator light.
9. Strong aluminium housing.
10. 3 pin sockets with child protection and 45% alignment.
11. Protected analog telephone fax modem connections RJ-11 with gas protectors and transient diodes.
12. Protect coaxial connections with gas divertors.
13. Efficient audio video interfernce suppressors wtih special coils and capacitors.

To view a large picture click on picture and open link in new window.

Rabu, 12 Oktober 2011

Panasonic TV Camera Model WV-71 - What is inside

What you have always wanted to know about what is inside the Panasonic TV Camera Model WV-71. This is Made In Japan, use a TV camera tube not a  CCD device. Has video over DC connection, thus saving one extra power cable.  You just need a video cable to connect the camera to a video recording or TV screen. This is very useful considering that the camera is usually installed in remote locations far from the monitoring location.

Panasonic TV Camera Model WV-71 TV
Camera Tube KV-19NA

Panasonic TV Camera Model WV-71

Minggu, 02 Oktober 2011

Intel R80286-8 CPU Chip in PLCC ZIF Package

Intel R80286-8 CPU in a PLCC ZIF package.

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