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The reduction in High Voltage and Screen Voltage when using CW mode held back the 4CX1500B gain, and total-power. I was almost at the point of using the SSB setting for CW, when Chet VE3CFK pointed out... |
The reduction in High Voltage and Screen Voltage when using CW mode held back the 4CX1500B gain, and total-power. I was almost at the point of using the SSB setting for CW, when Chet VE3CFK pointed out... |
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That feeding both the primary wires from the front-panel-switch to the SSB connections on the transformer would give me a constant 3kV and raised |
That feeding both the primary wires from the front-panel-switch to the SSB connections on the transformer would give me a constant 3kV and raised Screen, no matter the mode. In fact, doing this means the only difference between SSB and CW is the negative grid-bias, and the resulting Class of operation. |
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The realization of Chet's suggestion: simply moving the CW-primary-power wire from Term #1 to Term #2, and similarly moving Term #6 to Term #5: |
The realization of Chet's suggestion: simply moving the CW-primary-power wire from Term #1 to Term #2, and similarly moving Term #6 to Term #5: |
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Revision as of 02:03, 28 May 2020
Raising CW Plate- and Screen-Voltages
The reduction in High Voltage and Screen Voltage when using CW mode held back the 4CX1500B gain, and total-power. I was almost at the point of using the SSB setting for CW, when Chet VE3CFK pointed out...
That feeding both the primary wires from the front-panel-switch to the SSB connections on the transformer would give me a constant 3kV and raised Screen, no matter the mode. In fact, doing this means the only difference between SSB and CW is the negative grid-bias, and the resulting Class of operation.
The realization of Chet's suggestion: simply moving the CW-primary-power wire from Term #1 to Term #2, and similarly moving Term #6 to Term #5:
Now I have good gain and total power! Thanks, Chet! Here's a view of comfortable operating conditions now, for CW:
