The 4-1000A is a relatively large glass tube with an overall height of 9.25 inches and a diameter of 5 inches. It is designed to operate with its plate (anode) at an orange-red color due to the "getter" being a zirconium compound on the anode structure …

Title: 4-1000A Author: Eimac Subject: FP-KS-2003-05-03 Created Date: 12/29/1999 4:04:23 PM

The 4-1000A has an instant-on filament so there is no need to have a delay between powering the filament and applying the high voltage. The H.V. switch controls the 117 volt AC voltage going to the power supply cabinet through the Remote/Local switch …

Jan 1, 2021 · The one for the single 4-1000A does not have a plate voltage meeter so depends on the meter in the front panel of the Linear. The larger one has the filament supply on the right and the plate supply on the left.

The 4-1000A is intended for use as an amplifier, oscillator, or modulator and is capable of efficient operation well into the VHF range. Cooling of the tube is accomplished by radiation from the plate and by circulation of forced-air through the base and around the envelope.

The Eimac 4-1000A / 8166 is a radial-beam tetrode with a maximum plate dissipation of 1000 watts. Intended for use as an amplifier, oscillator, or modulator. Capable of efficient operation well into the VHF range.

Tube 4-1000A or Röhre 4-1000A ID30766, Beam Power Tube, Giant 5 pin (ESEC B5F) and VHF shown. Radio tubes are valves.

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The 4-1000A or 8166 is a 1000 watt dissipation tetrode. The usable frequency for maximum ratings is 110 MHz. It replaced the 4-750A by April 1947 when its tentative data was released.

One of my favorite Amplifier projects was the 4-1000A and Power Supply. I have many photos of it now, thanks to Ko4oo. The hand drawn schematics are straight forward and basic. Enjoy. Magnificent Tube ! Front Panel.