Opvangtehuis voor buizenbakken
I found an other little project. This walkman is a mono cassette-recorder/player. It has 1 knob recording, adjustable bandspeed and a speaker. I think it was more a dictaphone then walkman. It still looks like new but needs some TLC. I still have a bunch of cassettes I taped in the 80 s from the radio. ... Read more
This is a very cute portable CD-player made, if I m correct, in 1992. After years of for most commercial repair I wanted to do some fun stuff in between. No hurry, no need to succeed, just relaxing repairs. I volunteer at the Salvation Army thrift-store and this beauty landed on my desk to test before ... Read more
This during a repair. I did some measurements to show that a DMM is unfit to measure capacitance with the goal to know if it is bad. New Panasonic low ESR FM, 50V 22 uFLCR meter: 21,01uF, D=0,025 at 100 HzDatasheet: D new max 0,1At 100 kHz the impedance is Z =0,34 ohm, that is: Z=0,33ohm-j0,072, ... Read more
No they are not. They are among the best caps when you take in account the low volume/size. You often hear they are stable, low D and last a long time. But they are not resistant to over voltage. That I why I did a little test using an SMU to see the current leaking ... Read more
TRIACs are strange beasts. The operate in 4 quadrants, that is most of them can. As far as I know they all can operate in 3 quadrants and some in all 4. The modes are a combination of the gate voltage polarity and the T2 voltage. T1 is referenced at ground. So T2 can be ... Read more
A friend gave me an old transmitting compass. A Neco Marine NM3. It was long ago part of a ship s autopilot. The construction is interesting. A flux-gate is very sensitive in measuring magnetic fields. But the earth magnetic field strength is very low. You can amplify the signals and make a compass that is only ... Read more
I use an autoradio on my boat and this radio has a subwoofer output. The problem is it needs an active sub-woofer and I had a nice small passive subwoofer (140W) from an old stereo set I did not use anymore. Amplifiers are not my thing and I was busy with work so I needed ... Read more
On board of my boat I have a 12V system. To charge the laptop while on the water you can use a 12 to 230V sinewave inverter but it would be efficiënter to go from 12V direct to 19 via a boost converter. This one I build using an oldie but goldie, the 34063. But ... Read more
Some thoughts on hot air soldering equipment A hot-air station has 2 main parts. The heater and the blower. The heater is always in the handpiece and its function is to heat the air that flows through or over it. The big difference between stations is how well the heater is able to heat the ... Read more
This instrument is complete with a whole bunch of accessories. Like the accessories/cables/pods pouch in backpack format, pods, cables, connectors, grabbers etc and manuals. It has a huge number of parallel connections through pods with very thick and stiff cables, But the connections to the circuit under test are very well made compared to most ... Read more