Bóng đèn Emission Lab RS 242

RS 242 was designed by Telefunken as a space saving transmitter tube for portable applications, and for amateur radio. It’s good sound, made it a popular audio tube amongst Japanese collectors. The combination of gain=17, and Rp=5k, and exceptional linearity of the tube curves, allows interesting audio applications.

The EML RS 242 is a replacement for the famous Telefunken RS 242. All dynamic parameters are identical. Heater current of the EML tube was chosen higher. (See also notes).

Tube microphonics is generally increased by the glass surface, and it decreased by the weight of the glass per square centimeter. This is why we have chosen for this very small glass Nothing was officially published by Telefunken, because RS242 was a second world war military product only. All we have is a data sheet which was packed with the tubes, giving data only as transmitter tube, together with some tube curves in a form we can not use, and of course we had NOS tubes. We have to say, the Japanese Audio Scene discovered as a first the fine properties of RS242 for Audio applications. Something Telefunken never intended. This is why data for Audio use was missing. We have measured the tube curves from a few perfect condition NOS tubes we could find in Germany, and we constructed the EML RS 242 to fit exactly to those curves.bottle, made of thicker glass. (See notes)

Socket: RS 242 has the European B4 Socket.