HOW TO TST RTC1 ?

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

Regards

 

To thank the Author because you find the post helpful or well done.

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

To thank the Author because you find the post helpful or well done.

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

 

Attachments:

• Lemouzy TC54 (254 KB)

To thank the Author because you find the post helpful or well done.