RAYTHEON 21J26 Electron Tube 6GX7 5KE8

( Brand: Raytheon ), ( Manufacturer Part Number: 21J26 ), ( Part Type: Tube ), ( Country Of Origin: United States )

Review RAYTHEON Electron Tube Lot Of Tubes New And More

The Raytheon 21J26 electron tube, specifically modeled as the 6GX7 5KE8, is a high-performance vacuum tube designed for use in various radio frequency (RF) applications. This tube belongs to the 6GX7 family, which is known for its versatility and reliability in amplifier designs.

The 21J26 tube is a triode type, meaning it has three active electrodes: the cathode, grid, and plate. The cathode is constructed of a heated filament made of a high-melting-point material, such as tungsten or thoriated tungsten, which emits electrons when heated. The grid, which is a thin metal plate, controls the flow of electrons from the cathode to the plate. Lastly, the plate is a large, positively biased electrode that collects the electrons emitted from the cathode.

The 6GX7 5KE8 tube operates in the intermediate frequency (IF) range and is particularly suitable for use in RF amplifiers, oscillators, and mixers. It has a plate voltage range of 150 to 300 volts and a plate current range of 25 to 350 milliamperes. The tube's maximum plate power dissipation is 4 watts, making it capable of handling moderate power levels.

The 21J26 tube features a high gain of approximately 50 dB and a high plate resistance of around 800 ohms. Its frequency response extends from DC up to several hundred megahertz, making it suitable for use in a wide range of RF applications. Additionally, the tube has a relatively low microphone-input impedance of around 300 ohms, which makes it a good choice for use in RF amplifier circuits that employ microphone inputs.

The 6GX7 5KE8 tube is well-known for its high ruggedness and stability. It is designed to operate reliably in harsh environments, making it an excellent choice for use in military, aerospace, and industrial applications. The tube is also relatively compact, with a diameter of approximately 9 inches and a height of around 3 inches, making it suitable for use in applications where space is a concern.

The Raytheon 21J26 electron tube, model 6GX7 5KE8, is a high-performance vacuum tube that offers excellent gain, high plate resistance, and a wide frequency response. Its rugged design and compact size make it an ideal choice for use in RF amplifier circuits, oscillators, and mixers, particularly in applications where reliability and performance are critical.

Raytheon 21J26 electron tubes, specifically the 6GX7 and 5KE8 variants, have been used in various electronic applications due to their excellent performance characteristics. However, like any other electronic component, they come with their advantages and disadvantages.

1. High gain and low noise: These tubes offer high gain and low noise, making them ideal for use in amplifier circuits, especially in radio and television applications.

2. Long life: Electron tubes are known for their longevity. With proper maintenance and care, these Raytheon tubes can last for thousands of hours.

3. Reliability: Tubes have proven themselves to be reliable components in various electronic systems. They are less susceptible to electromagnetic interference (EMI) and radio frequency interference (RFI) compared to solid-state components.

1. Fragility: Electron tubes are delicate components. They have vacuum-sealed glass envelopes, which can break easily if dropped or mishandled.

2. Power consumption: Tubes consume more power than their solid-state counterparts. This can lead to increased operating costs and energy consumption.

3. Size and weight: Electron tubes are larger and heavier than solid-state components. This can be a disadvantage in portable electronic devices where small size and low weight are essential.

Raytheon 21J26 electron tubes, including the 6GX7 and 5KE8 variants, offer several advantages such as high gain, low noise, long life, reliability, and excellent performance characteristics. However, they also come with some disadvantages, including fragility, power consumption, and size and weight. The decision to buy these tubes depends on the specific application, design requirements, and trade-offs between performance and size, weight, and power consumption.

If you require high gain, low noise, and excellent performance in an electronic application, and are willing to accept the trade-offs in terms of size, weight, and power consumption, then the Raytheon 21J26 electron tubes, specifically the 6GX7 and 5KE8 variants, could be a good choice. However, if size, weight, and power consumption are critical factors in your design, you may want to consider solid-state alternatives.

Details:

Please look at the pictures to see all different types of tubes. Lot of 11 New Old Stock Raytheon Electron Tubes. I do not have a way to test them, but they are new in their boxes. All are in excellent shape with no damage or issues that I can tell.

part #: 21j26 prices

• $11.98-$30.00

specifications vintaelec:

• brand: Raytheon
• mpn: 21j26
• part type: Tube
• country of origin: United States

returns vintaelec:

• policy: No Returns

payments vintaelec:

• credit card: Visa
• wallet: Apple-pay
• other

shipping vintaelec:

• carrier: USPS
• transit: 4-9 Days
• service: USPS Ground Advantage
• cost: $11.55
• class: Standard
• type: Calculated

general vintaelec:

• Consumer Electronics > Vintage Electronics > Other Vintage Electronics
• condition: Open box

seller vintaelec:

• # reviews: 3034
• city: Danville, New Hampshire
• rating: 99.6%

offer vintaelec:

• started: October 26, 2025
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• sold: 0

Raytheon 21J26 Is Similar To:

• 1n68a Raytheon One New Old Stock Germanium Diode In Original Packaging (28.8% similar) One new old stock, nos, Raytheon 1N68A germanium diode in original sealed packaging we combine shipping...(October 10th, 2018)
• 5751 Raytheon Nos Windmill Black Plate Vacuum Tube (26.9% similar) 2 ma v aka milestones. Finally, each tube is tested in a headphone amplifier for acceptable levels of micro phonics. Curve traces: plate resistance RP and current: 20 measurements, VG -2. That's just the facts. All tube testers are slightly different especially the antiques. 0MA, plate resistance RP...(March 27th, 2018)
• 6ah6 Raytheon Vacuum Tubes Various Brands All Tested Good (36.5% similar) I'm not an expert but I did purchase a tester. Quality tests all tubes tested on a bk 667 solid state tube tester for shorts, leakage. Tubes from an estate sale someone who worked for Boeing and knew a lot about. All listed tubes tested good...(November 11th, 2018)
• Ml-5681 Machlett Raytheon Giant Plated Power Tube Scrap (27.4% similar) Some folks have used these for table lamps, actual use, and high recycle value. 3 giant rhodium copper plated ML-5681 machete power 40LB tube Raytheon scrap up for your consideration is these tubes each one 19. Each tube is constructed out of rhodium current rate over ounce plated copper, other ...(June 26th, 2018)
• Oa2 Oa2wa Raytheon Vacuum Tubes Rca Sylvania Cbs Untested (34.9% similar) I don't have a way to test this type of tube. Tubes from an estate sale someone who worked for Boeing and knew a lot about. He didn't keep stuff that was bad...(November 7th, 2018)
• Jan 5672 Raytheon Tubes Cv Lot Of (41.2% similar) Sold as it is, no warranty. All the 20PCS is new. 00ZONE 2: pt,at,DJ,IE,es,Lu,SE,fie. Package we select the most efficient way of packaging so that items arrive safely. Zone 6: Au,AF,vn,JP,in,id,ke,CNN,ls,my,MN,NZ,nag,AZ,Kr,pk,sag,Zs,wt,th,pH,Gk, 7: AI,ET,ht,Ci,dz,as,Tl,AI,Ag,ar,aw,VI,ve,BM,VG,BO,br...(September 15th, 2021)
• Raytheon 280-globe 1 Nos To Very Strong 280 Globe Duel Box Plates Audio Radio Tube (27.8% similar) I no longer ship to china Vietnam due lost packages in custom's. Value being 40/40 good luck buying...(September 6th, 2024)
• Raytheon Er-247 1 Nos Testing Box Plate Audio Radio Tube (28.8% similar) I no longer ship to china Vietnam due lost packages in custom's. Value being 50 so this tube tests 100% good luck buying...(August 9th, 2025)
• Raytheon Other 12bz7 5 Nos Nib And 2 Free Radio Audio Tubes (29.2% similar) I no longer ship to china Vietnam due lost packages in custom's...(November 21st, 2025)
• Raytheon 5744wb 25 Nos Nib Radio Audio Tubes (37.2% similar) I no longer ship to china Vietnam due lost packages in custom's. 25 nos nib Raytheon 5744WB radio audio tubes, good luck buying...(December 15th, 2025)
• Raytheon Jan8421 Nixie Electron Tube Burroughs 5092 (50% similar) Raytheon JAN8421 Dixie electron tube Burroughs 5092, new old stock, OR2060 A551...(April 21st, 2026)