Radio tube ECH3 (silber), manufactured by Tesla

This vacuum tube has been tested with a tube tester, test result at least 'good'.

• We vouch for the proper function of this tube with the EAN no. 4051154165165.
• This radio valve is new/nos, at least 'good' tested and in best shape
• you are not satisfied, we will exchange it to immediately or refund the purchase price for this item no. 17661,
• possibly may have become partially illegible printed labels during the long time on stock.

Production and quality of radio tubes

The industrial production of radio tubes began already in the early 1920s, demand increased, especially by the rapid development of wireless technology within a few years enormously. Especially developed for broadcasting tube types were produced en masse. This happened in such a large scale that even today by a number of models, as well as from the employment offered here ECH3, manufactured by Tesla, is available yet variously virgin, sometimes in the original packaging.

To view the properties of pipes, such as the gain performance over the entire life period to keep stable, the radio tubes
were in one production step artificially aged. The mass production of the time took place in the then possible manufacturing tolerances, so far could have any new tube above-average properties. Particularly high-quality tubes, including this article 17661 could be selected only by a single test tube
The here offered tube ECH3 by Tesla is first and foremost a standard tube of the mass production. Only in 2016 this tube no. 17661, EAN 4051154165165 was subjected to a subsequent examination on a tube tester. As a result of measurement was at least 'good' found. Thus you acquire with the product 17661 is a particularly high-quality tube.

We wish you much joy and success for using it in your project.

Design and scope as shown and described. If you are not completely satisfied with the tube 17661, contrary to expectations, we will always search for a friendly solution such as conversion or redemption which suits your interests best.