Hello Mark,
Filament in tube measures ~2.5 Ohms and the correct voltage is on the
filament "pins" in the socket. Haven't measured the filament
voltage at the tube for a while. It was done when setting the
filament voltage while getting the amp. set-up.
At 05:22 AM 11/23/2005, Mark Hill wrote:
>Mike,
>
>Is the heater of the 4CX glowing?
>
>Regards.
>
>Mark.
>
>--------------------------------------------
>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
>
>*******************************************
>Mark Hill - G4FPH
>E-mail: g4fph@mjha.co.uk
>Current web pages at: www.g4fph.net
>Old web pages at: www.qsl.net/g4fph
>----------------------------------------------------------------------
>Dipoles resonant on 1942 / 3720 / 7085 kHz
>Three element wire beam coming soon on 14180 kHz!
>----------------------------------------------------------------------
>Remember - SIDE for HV safety:
>S witch off
>I solate
>D ump
>E arth
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>
>
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73,
Mike, K4GMH
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