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Plate choke current capability

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Posted on January 10, 2017 at 13:28:30
Tubenstein
Audiophile

Posts: 141
Joined: August 5, 2011
Hello!
If I runs a big triode, let's say 1100v @80mA.Now I have a plate choke for parallel feed output configuration and the specification indicates its current capability is 80mA.

Do you think the choke is adequate?

Thanks!

 

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RE: Plate choke current capability, posted on January 10, 2017 at 17:22:44
dave slagle
Manufacturer

Posts: 4726
Location: NYC
Joined: April 27, 2001
You really need to give some more info about the choke and the circuit it is going into in order for a fair assessment to be made.

What is the Rp of the tube it will be loading?
What is the inductance of the choke?
What is the maximum AC voltage at the lowest frequency of interest?

If the choke is intended for parafeed output you may be fine but putting the possible 1100Vdc insulation issues aside that high of a voltage suggests you may also have the possibility of fairly High AC voltages and that AC on top of the 80maDC could very well saturate the plate choke at low frequency signal peaks.

The easiest way to check this is with a signal generator and scope since magnetic saturation is easily visible on a sine wave.

dave

 

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