[AMPS] start

[MM@plextek.co.uk (Mark Marsden)]

>> I had a power transformer with all the secondaries together ( including
>> filaments) for a tetrode (4CX400). Can I put all voltages in the start,
>> with screen in 0 volts, and 30 seconds later full voltage?
>
>Juan,
>
>It is always best to not have HV until the tube warms up, and 
>always HV on anode and bias before having screen voltage.
>
>You can apply all voltages at one time with a MOX cathode tube, 
>but you must absolutely protect the tube from any cathode current 
>before the cathode is fully heated....or you will ruin the tube. 
> 
>73, Tom W8JI
>w8ji@contesting.com 
>

Tom,
How long would you recommend the filament voltage of a 4CX1000A 
be on for, before applying the other rails?

73, Mark G4AXX

                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                     

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