GENARAL RADIO CO 728A Vacuum Tube Voltmeter

( Brand: Genaral Radio Co ), ( Manufacturer Part Number: 728A ), ( Part Type: Vacuum Tube Voltmeter ), ( Country/region Of Manufacture: United States )

Review GENARAL RADIO CO Type Vacuum Tube Voltmeter Usa

The General Radio 728A Vacuum Tube Voltmeter is a classic piece of vintage test equipment that exudes a sense of nostalgia while delivering precise and reliable measurements. This voltmeter is a well-crafted example of mid-century engineering, designed to provide accurate voltage readings for various electronic applications.

The 728A features a robust aluminum chassis, finished in a vintage olive green color, which not only adds to its aesthetic appeal but also contributes to its durability. The instrument panel is equipped with a large, easy-to-read dial, graduated from 0 to 1000 volts, allowing for precise voltage measurements. The dial is backed by a highly-visible, white-faced pointer, ensuring high visibility even in low-light conditions.

The heart of this voltmeter is its vacuum tube technology, specifically the 6AN6 dual triode tube, which provides a high input impedance, ensuring minimal load on the circuit under test. This is particularly beneficial in sensitive applications where the measurement itself may influence the behavior of the circuit. The 728A is capable of measuring both AC and DC voltages, making it a versatile tool for a wide range of test scenarios.

The General Radio 728A Vacuum Tube Voltmeter is equipped with a Battery Eliminator Circuit (BEC), which allows it to be powered by a standard 12V DC power supply instead of batteries. This feature not only eliminates the need for frequent battery changes but also reduces the risk of leaking batteries, making the 728A a more practical choice for modern users.

In addition to its main function as a voltmeter, the 728A also includes a built-in rectifier, allowing it to measure current by converting the AC signal to DC. While not as accurate as a dedicated ammeter, this feature provides an additional level of functionality, making the 728A an even more valuable tool for the electronics enthusiast.

The General Radio 728A Vacuum Tube Voltmeter is more than just a measurement tool; it's a piece of history that continues to serve a practical purpose in the modern world. Its vintage design, combined with its high-quality construction and reliable performance, make it an attractive addition to any collection of test equipment or a useful tool for hobbyists and professionals alike.

1. Historical and Collectible Value: The General Radio 728A is a vintage instrument that has been in production since the 1940s. Owning one of these meters can be a great addition to any vintage electronics collection.

2. High Accuracy: Vacuum tube voltmeters, such as the 728A, are known for their high accuracy. This makes them ideal for use in sensitive applications where precise measurements are required.

3. Durable Construction: The 728A is made with high-quality materials and construction, which makes it a durable instrument. It is built to last and can withstand heavy use.

4. Easy to Use: The 728A is a simple instrument with few controls, making it easy to use. It is also calibrated for direct connection to AC power lines, which eliminates the need for additional test leads.

1. Limited Functionality: The 728A is a specialized instrument that is only useful for measuring AC voltage. It does not have the ability to measure other parameters such as current, resistance, or frequency.

2. Limited Range: The 728A has a limited voltage range of 0-1000 volts. This may not be sufficient for measuring high voltage applications.

3. Vacuum Tube Maintenance: Vacuum tubes require regular maintenance to ensure proper operation. This can be time-consuming and may require specialized tools and knowledge.

4. Limited Availability: Vintage instruments such as the 728A are becoming increasingly rare and difficult to find. This can make them expensive to purchase.

The General Radio 728A is a high-quality, durable, and accurate instrument that is ideal for measuring AC voltage in sensitive applications. However, its limited functionality and range, as well as the need for vacuum tube maintenance, may make it less suitable for general use. Additionally, its rarity and high cost may make it a less attractive option for budget-conscious buyers.

If you are looking for a high-accuracy voltmeter for sensitive applications and have a collection of vintage electronics, the General Radio 728A may be a worthy investment. However, if you are looking for a more versatile and affordable instrument, there are modern digital meters that may be more suitable for your needs. Consider your specific requirements and budget before making a decision.

Details:

And Canada only. Dimensions hwd 9.

5 inch x 356 216mm notes range 945 kg literature schematics 1 original-techno.

5 x 14 FedEx ground or USPS us. Net weight 5 lb 17 8 oz 1 kg. Power out from Radio museum.

specifications vintaelec:

• brand: Genaral Radio Co
• mpn: 728a
• part type: Vacuum Tube Voltmeter
• country/region of manufacture: United States

General vintaelec:

• vintage electronics > equipment
• in stock: Yes

Payments vintaelec:

• PayPal

Returns vintaelec:

• policy: no returns

Seller vintaelec:

• zipcode: 95129
• city: San Jose, California

Offer vintaelec:

• best offer: false
• bids: 0
• quantity: 1
• Sold: 0
• Started: April 22, 2018, 9:36 am

Ratings:

1. Thank you for your purchase! 03-26-18
2. Quick easy transaction. Please come back again. The Vintage Express Store! 03-30-18
3. Works Very Well!! Thanks 04-14-18
4. Excellent! 03-23-18
5. Not as described, and seller only gave partial refund!!! 04-03-18

Shipping vintaelec:

• handling: 2 days
• cost: $28.0
• type: Flat