| CW MODE |
 |
| The sparks are shorter and hot. The tube is glowing orange- red after 20 seconds. I pushed too far this poor EL509 tube. |
 |
 |
| CW MODE |
|
| The sparks are shorter and hot. The tube is glowing orange- red after 20 seconds. I pushed too far this poor EL509 tube. |
|
|