
6BQ7A-6BZ7-6BS8 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $9.41 | Condition is New, RCA 6BQ7A 6BZ7 6BS8 VACUUM TUBE NOS, shipping cost = $6.72 | 100.0% |
![]() | $9.92 | Condition is New, RCA 6BQ7A 6BZ7 6BS8 TUBE, shipping cost = $7.89 | 100.0% |
![]() | $19.95 | Condition is New, Vintage NOS new old stock Lot of two RCA tubes 6BQ7A 6BZ7 6BS8, shipping cost = $6.00 | 99.7% |
![]() | $25.00 | Top Pick! Condition is New, x5 NEW Vintage NOS RCA 6BQ7A / 6BZ7 / 6BS8 Vacuum Tube RCA E5 K5, shipping cost = $8.60 | 99.8% |
![]() | $34.99 | Condition is New, x5 NEW Vintage NOS RCA 6BQ7A / 6BZ7 / 6BS8 Vacuum Tube RCA E5 K5, shipping cost = $9.14 | 99.8% |
![]() | $80.00 | Top Pick! Condition is New, RCA 6BQ7A 6BZ7 6BS8 Electron Tube USA Made (8 Pieces Lot) NOS FREE POSTAGE, FREE SHIPPING | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $4.05 | Condition is Used, RCA 6BQ7A 6BZ7 6BS8 Vacuum Tube NOS Dual Triode Tested TV-7 Vintage USA, shipping cost = $5.25 | ![]() |
![]() | $13.95 | Condition is Used, Vacuum Tube 6BZ7 Hz 6BQ7A/6BZ7/6BS8 RCA, FREE SHIPPING | 99.6% |
![]() | $9.99 | Condition is Used, RCA Vacuum Tube 6BQ7A/6BZ7/6BS8, Untested, shipping cost = $6.99 | ![]() |
![]() | $6.00 | Top Pick! Condition is Used, RCA 6BQ7A / 6BZ7 / 6BS8 Tube (Untested), shipping cost = $10.75 | 100.0% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $7.99 | Condition is Open box, RCA Electron Vacuum Tube 6BQ7A/6BZ7/6BS8, shipping cost = $5.00 | 100.0% |
![]() | $17.99 | Condition is Open box, 2 NOS RCA Radio Audio Amplifier Valve Vacuum Electron Tubes 6BQ7A/6BZ7/6BS8 *, shipping cost = $5.50 | 99.6% |
![]() | $14.88 | Top Pick! Condition is Open box, RCA 6BQ7A 6BZ7 6BS8 TUBES MATCHED PAIR 1964 AMPLIFIER B&K 747B TESTED, shipping cost = $9.63 | 99.6% |
![]() | $25.00 | Condition is Open box, Lot Of 4: NOS RCA Radio Audio Valve Vacuum Electron Tubes 6BQ7A/6BZ7/6BS8 *, FREE SHIPPING | 99.7% |
![]() | $25.00 | Condition is Open box, Lot Of 4: RCA 6BQ7A 6BZ7 6BS8 TUBES 1960s, FREE SHIPPING | 99.7% |
![]() | $45.95 | Condition is Open box, Lot of (6) NOS RCA 6BQ7A 6BZ7 6BS8 tubes in original boxes,radio,amp,6BQ7,ECC180, FREE SHIPPING | 100.0% |
![]() | $55.02 | Condition is Open box, 6BQ7A/6BZ7/6BS8 RCA NOS Tube Valvula R hre Valvola Lampe TSF Valve , shipping cost = $65.00 | 98.7% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $16.25 | Condition is , Tube 6BQ7A/6BZ7/6BS8 RCA NOS Boxed, shipping cost = $34.82 | 99.8% |


The RCA 6BQ7A/6BZ7/6BS8 vacuum tube is a high-quality electronic component that has been a staple in audio and radio applications for decades. This triode tube is designed with a tetrode-connected grid, which provides excellent linearity and low distortion, making it ideal for use in amplifiers, oscillators, and other circuit designs.
The RCA 6BQ7A is a general-purpose tube that can be used in a variety of applications, including audio preamplifiers, power amplifiers, and vacuum tube rectifiers. It has a plate current rating of 200mA and a plate voltage of 300V, making it suitable for use in medium-power applications. The tube has a frequency response of 150Hz to 15kHz, which ensures accurate reproduction of audio signals.
The RCA 6BZ7 is a high-mu version of the 6BQ7A, which means it has a higher gain and can drive lower impedance loads. It is often used in audio power amplifiers and high-power audio preamplifiers. The 6BZ7 has a plate current rating of 200mA and a plate voltage of 300V, making it suitable for medium-power applications.
The RCA 6BS8 is a low-mu version of the 6BQ7A, which means it has a lower gain but is more suitable for use in lower-power applications. It is often used in audio preamplifiers and radio receivers. The 6BS8 has a plate current rating of 100mA and a plate voltage of 300V.
All three of these tubes share the same filament voltage of 6.3V and filament current of 0.3A, making them easy to use in a variety of circuits. They are made of glass and metal and are relatively compact in size, making them easy to integrate into a circuit board.
In summary, the RCA 6BQ7A/6BZ7/6BS8 vacuum tube is a versatile and reliable component that can be used in a wide range of audio and radio applications. Its high linearity, low distortion, and excellent frequency response make it an ideal choice for use in preamplifiers, power amplifiers, and oscillators. Its easy-to-use filament voltage and current make it easy to integrate into a circuit board, making it a popular choice among hobbyists and professionals alike.
Pros of buying RCA 6BQ7A/6BZ7/6BS8 vacuum tubes:1. Authentic sound quality: Vacuum tubes provide a warm, rich, and natural sound that cannot be replicated by solid-state components. They are particularly good for listening to music and watching movies with a high dynamic range.
2. Improved linearity: Vacuum tubes have a more linear response to input signals, which means they can accurately reproduce the original signal without distortion. This results in a more accurate representation of sound and improved listening experience.
3. Durability: Vacuum tubes are made of glass and metal, which makes them highly durable and resistant to damage. They can last for many years with proper care and maintenance.
4. Flexibility: Vacuum tubes can be easily replaced or swapped out to achieve different sound characteristics. This allows users to fine-tune their audio equipment to their specific preferences.
Cons of buying RCA 6BQ7A/6BZ7/6BS8 vacuum tubes:1. Higher cost: Vacuum tubes are generally more expensive than solid-state components. This can make them a less affordable option for budget-conscious consumers.
2. Less energy-efficient: Vacuum tubes consume more power than solid-state components. This can lead to higher energy bills, especially if used in a large audio system.
3. Require more maintenance: Vacuum tubes require regular cleaning and alignment to ensure proper operation. They may also need to be replaced more frequently than solid-state components.
Conclusion:RCA 6BQ7A/6BZ7/6BS8 vacuum tubes offer a unique sound quality and improved linearity compared to solid-state components. They are highly durable and can be easily fine-tuned to achieve different sound characteristics. However, they are more expensive, less energy-efficient, and require more maintenance. Ultimately, the decision to buy vacuum tubes depends on the user's preferences, budget, and willingness to invest in maintenance.
Recommendation:If you are an audiophile who values sound quality and is willing to invest in maintenance, then vacuum tubes like the RCA 6BQ7A/6BZ7/6BS8 may be a good choice for you. However, if you are budget-conscious or prefer a more convenient and low-maintenance option, then solid-state components may be a better choice.
Details:
Simply by fixing what is broken. Better for, the planet: easy on, wallet: great your soul: because your device is a terrible thing to waste. Grid if shown in images is approx. 1934/l97c 245.244 0x4 #i:10058478 tube Rca 6BZ7 hz 6BQ7A/6bz7/6bs8.
Repair your device with this tube. One inch by one 1 x 1 square. Satisfaction guaranteed!: double checked by our technician to be in proper order.
specifications gotfastener:
- brand: Rca
- mpn: 6bq7a/6bz7/6bs8
- type: Tube
- compatible brand: For Rca
- guarantee: 30 Day Money Back
seller gotfastener:
- rating: 99.0%
- # reviews: 999
- city: california, pennsylvania
shipping gotfastener:
- carrier: usps
- type: calculated
- class: standard, expedited
- transit: 4-8 days
- service: usps first class, usps priority mail
general gotfastener:
- category: Business & Industrial > Fasteners Hardware
offer gotfastener:
- in stock #: 5
- availability: in stock
- prices: $4.05–$80.00
- item condition:
- New
- Used
- Open box
- options: ship-to-home
- sold #: 35
- started: september 1, 2024
returns gotfastener:
- paid by: seller
- policy: returns accepted
- method: money back
- time: 30 days
payments gotfastener:
- other
- credit card: masteRcard
- wallet: google-pay


















