EIMAC 4-300Z Gauranteed Ham Radio Tube

( Brand: Eimac ), ( Manufacturer Part Number: 4-300Z ), ( Part Type: Radio Tube ), ( Country/region Of Manufacture: United States )

Review EIMAC Tested Gauranteed Ham Radio Tube

The Eimac 4-300Z is a guaranteed ham radio tube, specifically designed for use in medium power applications. This vacuum tube is part of Eimac's renowned 4-series, which is known for its superior performance and reliability.

This tube is a fixed anode, cathode-controlled, single-triode designed for use as a high-frequency amplifier. It operates on a plate voltage range of 300 volts to 700 volts and has a plate current capability of up to 300 milliamperes. The tube's anode dissipation is rated at 1.5 watts, making it suitable for use in applications where moderate power output is required.

The Eimac 4-300Z tube features a high-quality quartz glass envelope, which provides excellent thermal shock resistance and ensures long-lasting performance. The tube's filament is operated on a voltage of 6.3 volts and draws a current of 650 milliamperes. This filament heats up the cathode to a temperature of around 1100 degrees Celsius, which facilitates the emission of electrons necessary for amplification.

The tube's high-grade metal filament is designed to provide a long life, even under heavy usage. The tube's grid is made of a high-purity nickel alloy, which ensures excellent conductivity and stability. The grid is also designed to be self-biasing, which simplifies the setup process and eliminates the need for external biasing components.

The Eimac 4-300Z tube's performance is further enhanced by its high gain, which can reach up to 60 decibels. This makes it an excellent choice for use in amateur radio applications, such as HF transceivers and amplifiers. The tube also exhibits a low plate resistance, which results in efficient power transfer and minimal power loss.

In conclusion, the Eimac 4-300Z is a high-performance, medium power ham radio tube that is designed for use in a wide range of applications. Its superior thermal shock resistance, long-lasting filament, and self-biasing grid make it a reliable and efficient choice for ham radio enthusiasts. With its high gain and low plate resistance, this tube delivers excellent amplification performance, making it a must-have component in any ham radio setup.

Buying an Eimac 4-300Z guaranteed ham radio tube can be a good investment for radio amateurs who require a high-performance output tube for their amplifier system. Here are some pros and cons to consider before making a purchase:

1. High Power Handling: The Eimac 4-300Z tube can handle up to 300 watts of power, making it suitable for high-power amplifier systems.

2. Longer Operating Life: Guaranteed tubes like the Eimac 4-300Z come with a longer operating life compared to standard tubes due to their rigorous testing and quality control processes.

3. Improved Efficiency: This tube offers improved efficiency, which can help reduce power consumption and cooling requirements.

4. Consistent Performance: Guaranteed tubes offer consistent performance, ensuring that the tube meets specifications and provides reliable operation.

5. Reduced Downtime: With a longer operating life and consistent performance, guaranteed tubes can help reduce downtime and maintenance requirements.

1. Higher Cost: Guaranteed tubes like the Eimac 4-300Z are more expensive than standard tubes due to their rigorous testing and quality control processes.

2. Limited Availability: Guaranteed tubes may be less readily available than standard tubes, making it more difficult to find a replacement if needed.

3. More Fragile: Guaranteed tubes are more fragile than standard tubes and require more careful handling during installation and operation.

In conclusion, the Eimac 4-300Z guaranteed ham radio tube offers several advantages, including high power handling, longer operating life, improved efficiency, consistent performance, and reduced downtime. However, it also comes with some disadvantages, such as higher cost, limited availability, and increased fragility.

Based on these pros and cons, if you require a high-performance output tube for your amplifier system and can afford the higher cost, a guaranteed tube like the Eimac 4-300Z may be a worthwhile investment. However, if you're on a budget or prefer a more readily available and affordable option, a standard tube may be a better choice for you. Ultimately, the decision depends on your specific requirements and budget.

Details:

I no longer ship to China Vietnam due lost packages in Custom's.

part #: 4300z prices

• $69.95-$175.00

specifications vintaelec:

• brand: Eimac
• mpn: 4-300z
• part type: Radio Tube
• country/region of manufacture: United States

payments vintaelec:

• credit card: Diners-club
• other
• wallet: Google-pay

seller vintaelec:

• rating: 100.0%
• city: Salem, Oregon
• # reviews: 9871

general vintaelec:

• Consumer Electronics > Vintage Electronics > Other Vintage Electronics
• condition: Used

shipping vintaelec:

• class: Expedited
• carrier: USPS
• cost: $16.00
• type: Calculated
• service: USPS Priority Mail
• transit: 4-10 Days

offer vintaelec:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: June 17, 2025
• quantity: 1

returns vintaelec:

• policy: Returns Accepted
• method: Money back
• time: 30 Days
• paid by: Buyer

Eimac 4-300Z Is Similar To:

• Eimac Other Vt-204 Lot Six 6 Jan And Norelco 3c24 24g Ham Radio Tubes (47.5% similar) Condition is unknown. Sold as part of my grandfathers lifetime ham collection. Please see photos for detail and message me with any questions. For sale is a lot of 6/3 C24/VT204 vacuum tubes. Three are Eimac brand, two Jan forelock and one. At least one in Eimac box appears new and unused...(September 16th, 2024)
• Eimac 8169 4cx3000a 1 Guaranteed Strong Radio Broadcast Audio Tube (60.2% similar) I no longer ship to china Vietnam due lost packages in custom's...(September 25th, 2024)
• Eimac 4x150d 8 Nos Nib can 4x150a And 1 Is D 4 Strong Ham Radio Tubes (51.7% similar) Part #: Eimac 4X150D for sale...(December 16th, 2024)
• Eimac 4-250a 1 Guaranteed Nos Nib Transamitter Radio Audio Tube (63.6% similar) Part #: Eimac 4-250A for sale...(January 17th, 2025)
• Eimac 254w 2 Mint Nos Nib Ham Radio Audio Tubes (55.3% similar) I no longer ship to china Vietnam due lost packages in custom's...(July 18th, 2025)
• Eimac Y-596 2 New 7203 y-596 Transmitter Radio Tubes (52.5% similar) 2 new Eimac transmitters 7203/Y-596. I will send them free via USPS priority mail. I put these in the drawer rack sometime ago, but can't remember where original boxes...(July 30th, 2025)
• Amperex 4x-500a 1 Guaranteed Nos Test Eimac Ham Radio Tube (62.9% similar) I no longer ship to china Vietnam due lost packages in custom's...(December 8th, 2025)