After restoring my Fisher 400, I could not let my smart head and creative hands rest. So I have started to look for another tube gear to apply my newly acquired skills. There was plenty of stuff around, but importing from USA to European Union is quite prohibitive - around $200 - $250 only for shipment plus domestic VAT and customs. I am was very
Click here to download the full size of the above Circuit.
eager to buy Sansui 1000a or Luxman, but none of them appeared in Europe for reasonable price level. So after all, I took a look at Pioneer SM-83 integrated tube amplifier, which time to time appear on eBay. I found a nice web site called "Fonar" in Poland which have quite detailed photos of internals, and I am was somewhat obsessed. Pioneer tube amp doesn`t have something I hate in other vintage devices - namely large can caps (or anything else) soldered or riveted straight to the chassis (its a hell work to remove them). Finally I have managed to buy one from France for 300 EURO. Additionally, I have occasionally met nice Finish radio junkie Jouko Kuisma which have bought the same amp in Germany. Of course, I have followed my own golden rules purchasing this Pioneer. However, it was not saved me from some unpleasant caveats. This kind of walkthrough is absolutely useless without high-resolution, detailed photos, and that represent a problem. Web pages with plenty of large graphics are slow to load, render and scroll. So I am posting medium-resolution photos straight on the page, with links to download larger (around 2500x1200) ones (for example, you can download photo above in full details). I am was thinking about slide-show on the 2nd linked page, or splitting article in 5+ separate pages, but this will be to cumbersome to navigate. Additionally, I have posted photo gallery with night shots of glowing tubes here. I...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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