Testing: Difference between revisions
Jump to navigation
Jump to search
| Line 7: | Line 7: | ||
</ul> |
</ul> |
||
<p>The Safety and Control seem to work. The Bias and Filament adjustments work.</p> |
<p>The Safety and Control seem to work. The Bias and Filament adjustments work.</p> |
||
<p> |
|||
<span> |
|||
[[File:Filament_voltage.jpg|500px|thumb|left]] |
|||
I clipped some test-leads right onto the tube-socket, in order to measure and adjust filament-voltage accurately. Eimac specifies 6.0 +/-5%, so that's what I gave it. |
|||
The panel-meter actually reads the incoming 115VAC supply, using that as a proxy for the actual filament voltage - you can see this does a pretty good job. |
|||
</span> |
|||
</p> |
|||
<br clear=all> |
|||
Revision as of 21:38, 29 June 2021
120V Initial Testing
- I installed the original 4CX1000A tube which came in my amplifier. Only the 3.2A fuse was installed, and I applied power!
- The meters illuminated; after the time-delay relay closed, the dials also illuminated. The "ON / OFF" switch functioned.
- Opening either the top-lid or the front-panel removed the dial-illumination, and prevented operation of the "ON / OFF" switch.
- I tested the Thermal Overload switch K102 by moving it out of, and back into the airstream - it works, and disables the "ON / OFF" switch when there is no airflow over the sensor.
The Safety and Control seem to work. The Bias and Filament adjustments work.
I clipped some test-leads right onto the tube-socket, in order to measure and adjust filament-voltage accurately. Eimac specifies 6.0 +/-5%, so that's what I gave it. The panel-meter actually reads the incoming 115VAC supply, using that as a proxy for the actual filament voltage - you can see this does a pretty good job.