
( Brand: Rca ), ( Model: 17D4 ), ( Country/region Of Manufacture: United States ), ( Type: Vacuum Tube )
The RCA 17D4 Vacuum Tube Single NOS (New Old Stock) is an exceptional piece of audio technology, harking back to the golden age of tube amplification. This single vacuum tube is a direct replacement for the original RCA 17D4, maintaining the authenticity and vintage charm of classic audio equipment.
The 17D4 is a pentode vacuum tube, featuring five active elements. This design allows for a balanced output while also providing sufficient current for driving power amplifiers. The tube is designed for use in both audio and television applications, making it a versatile choice for various audio systems.
One of the standout features of the RCA 17D4 is its ability to deliver a crisp, clear sound. The tube's design allows it to handle high frequencies with precision, resulting in a detailed and natural sound. This is particularly noticeable in the highs, where the tube provides a sparkle and clarity that can be lost in digital audio reproduction.
The RCA 17D4 is a NOS (New Old Stock) tube, meaning it is a newly produced tube that has been stored and aged to mimic the characteristics of vintage tubes. This process ensures that the tube maintains the same specifications and sound quality as its vintage counterparts, providing a true vintage experience without the risk of using an aged, potentially unreliable tube.
The RCA 17D4 Vacuum Tube Single NOS is a must-have for audiophiles and vintage audio enthusiasts looking to add a touch of vintage charm and superior sound quality to their audio systems. Its unique design, crisp sound, and NOS status make it a standout choice in the world of vacuum tubes.
Pros of buying RCA 17D4 Vacuum Tube Single NOS (New Old Stock):1. Authenticity: NOS tubes are original, manufactured during the vintage era and have been stored properly, ensuring their quality and performance.
2. Sound Quality: Vacuum tubes offer a warm, rich, and full sound that digital amplifiers can't reproduce. They provide a more natural and dynamic audio experience.
3. Durability: NOS tubes have not been subjected to the high temperatures and stress of use, making them potentially more reliable and long-lasting than new tubes.
4. Collectability: Vacuum tubes are collectible items, and the RCA 17D4 is a popular model. Owning this tube could increase its value as a collector's item.
Cons of buying RCA 17D4 Vacuum Tube Single NOS:1. Limited Availability: NOS tubes are not readily available, and it may take time to find the specific model you need.
2. Higher Cost: Due to their scarcity, NOS tubes are typically more expensive than new tubes.
3. Maintenance: Vacuum tubes require more maintenance than solid-state components, such as replacing filaments and checking for leaks.
4. Limited Compatibility: Not all audio equipment supports vacuum tubes, so you'll need to ensure your equipment is compatible before purchasing the tube.
Conclusion:The RCA 17D4 Vacuum Tube Single NOS is an excellent choice for audiophiles seeking a warm, rich, and dynamic sound. Its potential durability and collectability make it an attractive investment. However, its limited availability, higher cost, and maintenance requirements should be considered before making a purchase. If you value the unique sound and feel of vacuum tubes and have the budget and equipment, the RCA 17D4 could be a worthwhile addition to your audio setup.
At volt the tube is max conduction and top line on display. It is easy at that point to take where top line intersects the plate voltage , find lamp level and compare data sheet.
This is an honesty issue. I also use a tectonics curve tracer for testing tirades.
The lines show how tube conducts throughout that range. This is subjective and it too time consuming. I don't guarantee or imply anything else. This is a mutual conductance tester.
I will work with you in good faith if there are any problems, or unsatisfied way. I have a b k 747 tube tester.
I only guarantee that these tubes will test good, with no shorts, or gas, on a decent calibrated tester. Vintage tube testers almost always, due to age, have very low heater voltage s. It give a percentage value of gm for the tube under test and checks shorts grid emissions.
The very best portable testers only can approach 10 accuracy. I give a number of evaluations for tubes.
You can calibrate a vintage tube tester all want.
I don't check each and every tube for noise or tone. Do not handle the tubes or hold them from cylinder. Always hold them from the ends.
One evaluation is a screen shot of the tube with high voltage applied to plate. Every tester I have ever bought is below 6 volts when selecting. I give those numbers for you in the item condition box tectonics curve tracer gives values within 3 of actual value.
I will bend over backwards to make sure that you are a happy customer volts . Testing: I test all tubes that sell in one way or another, will state untested.
They average 5.
The curve tracer steps tried through 10 gate grid voltage s starting with 10 volts and going. All tubes are tested for shorts, continuity, and emissions.
And all the angels sang because heavenly music was playing it turned way up. They say have a calibrated tube tester.
Sound quality is tremendously subjective. On all of them I have an outside regulated dc power supply that feeds the tube tester correct heater voltage .
On my tester a b k 747 tester: below 55 bad 55-65. The voltage needs to be 6.
Tube hunter vacuum gems these are the specifics of tubes for sale: manufacturer: Westinghouse production city: USA type: 17D4 designation: year: 1960s month: date code match single silk screen condition: 100 mica: 2 plates: grey gm 120 pair quad multi: fetter: o fetter this offer is one. I have 40 tube testers.
If we sent the wrong tube will of course pay for return shipping. It can be wiped off and destroyed very easily. If you are buying only one item this will not be an issue.