[Amps] Is This 4CX1600B Still Good?

[Mark Hill]

Mike,

Is the heater of the 4CX glowing?

Regards.

Mark.

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At 20:34 22/11/2005, you wrote:
>The 4CX1600B was reinstalled in the amp. however now there is no
>ZSAC.  The ZSAC should be around ~350 mA.  Checked the voltages, 3100
>V anode, 330V SG2, -56 V SG1, 12 VAC fil.  Cathode grounded.  Also,
>there is no reduction of the anode voltage to indicate the tube is
>drawing current.  Previously, the anode voltage would be reduced ~100
>V when the amp. is keyed with no drive.
>
>          73,
>          Mike, K4GMH

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Mark Hill - G4FPH
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