RTC1

Hi, anyone able to tell me how to test RTC1 tube ?

Regards

A simple continuity check can be done measuring the cold resistance between pins 2 and 3 - the two smaller pins - which could measure somewhere around 200 to 500 ohms. A more accurate test could be made applying 50 V rms between the same pins and measuring the current which should be around 300 mA AC. The test could aldo be done in DC.

Emilio

Hello,

I have check my used RTC1 as in the circuit diagram of the Lemouzy TC54 radio

"Resistor" A  approx. 30 ohms cold is for approx. 110 V network with 5 tubes, eg 3 x 6.3V + 2 x 25V heating and 0,3 A heating current

"Resistor" B  approx. 19 ohms cold,

For 220V network the two resitor A + Bare serial switched with  5 tubes, eg 3 x 6.3V + 2 x 25V heating.

Note : In the Lemouzy TC54 a 70 ohms are used with "Resistor" A for 130 V Network and or with A + B for 240V network.

Kind regards

Anlagen

• Lemouzy TC54 (254 KB)