Vacuum Tube - 4-125A / 4D21, Tetrode, Power Amplifier

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Vacuum Tube - 4-125A / 4D21, Tetrode, Power Amplifier

In stock
Quantity in stock: 4

New-Old-Stock (NOS) tube.

The 4D21 / 4-125A is a four-electrode tube designed for use as a power amplifier and oscillator. The anode is capable of dissipating 125 watts, and cooling is accomplished by radiation. The cathode is a thoriated-tungsten filament. Maximum ratings apply up to 120 megacycles.

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Product Measurements
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Packaging Information
Packaging Dimensions3 in. × 3 in. × 7 in.
Weight (Packaging)0.714 lbs.

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