- Antique Electronic Supply
- Source of old stock and current production vacuum tubes, parts, supplies and literature for your vacuum tube equipment.
- Brand X-ray Tube Co., Inc.
- Manufacturer of x-ray tubes for medical, dental, industrial imaging and x-ray inspection, manufacturing x-ray tubes for applications up to 160 kv.
- California Tube Labs
- Designs and manufactures a wide range of high-power pulse and CW magnetrons, and provides cost-effective magnetron rebuild services for commercial, industrial and defense users.
- D & C Electronics
- Microwave oven parts, MRI tubes, commercial, microwave, broadcast, defense, scientific, antique, amateur, parts for CCA, continental, and Harris transmitters.
- House of Tubes
- Offers high-quality brand name tubes ideal for use in audio amplifiers and ham radio equipment at low prices, including used and hard to find tubes.
- Kennetron, Inc.
- Rebuilds vacuum tubes, oscillator tubes, power grid tubes, and electron valves used in industrial and broadcast applications.
- Lohmann X-Ray GmbH
- Manufacturer of fixed anode x-ray tubes for industry and medicine.
- Penta Laboratories
- Manufacturer and distributor of vacuum tubes, capacitors and electron tubes for broadcast, industrial, marine and avionics applications.
- Superior X-Ray Tube Company
- Manufacturing quality x-ray tubes used in a wide range of applications, including, medical, dental, thickness gauging, food inspection, bone densitometry, non-destructive testing, and x-ray fluorescence spectroscopy.
- The Tube Center
- Supplying vacuum tubes, valves, grid caps, and sockets for antique collectors, ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists.
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