If you are an audiophile looking for high-quality sound and reliable performance, the EL84 8KPP84 push-pull transformer is exactly what you need. Available in two versions – 8KPP84A with 20% ultralinear taps and 8KPP84B with 43% ultralinear taps – this transformer is designed to deliver exceptional sound and unmatched flexibility.

With a primary impedance of 8000 ohms and secondary taps at 4/6/8 ohms, the 8KPP84 is rated for 20 watts RMS, ensuring a dynamic and powerful response for every listening session. Whether you are building an amplifier for your home listening room or for a high-fidelity project, the 8KPP84 adapts perfectly to your needs.

Ultralinear Variants to Suit Your Preferences

Whether you prefer a 20% ultralinear response with the 8KPP84A model or a more extended 43% response with the 8KPP84B model, you can tailor the sound to your personal taste and specific requirements.

Reliable Performance and Flexible Use

Tested to ensure optimal results, the 8KPP84 transformer offers dependable performance and uncompromising flexibility. Whether you are a DIY audio enthusiast or an audio professional, the 8KPP84 fits perfectly into a wide range of applications.

Explore Projects Using the 8KPP84 Transformer

Click the following link to discover projects that make use of the 8KPP84 transformer:

• Project: Shade84 Light – Push-pull EL84 – Without global feedback loop

Frequency Response Chart

Don’t miss the chance to enhance your listening experience with the EL84 8KPP84 push-pull transformer. Discover the difference it can make in your audio setup and get ready to immerse yourself in high-quality sound like never before.

If you purchase output transformers together with other components such as chokes, power transformers or any other items for sale on our website, you can benefit from significant quantity discounts compared to individual prices. Check the discount scale below.

Model 8KPP84A / 8KPP84B
	Type: Push-Pull Designed for tubes: Parallel Push-Pull of EL84 (*) Primary impedance: 8000 ohms with 20% or 43% UL tap according to customer specification Secondary impedances: 4/6/8 ohms Primary resistance: 80 + 80 ohms Maximum power: 20 W RMS Leakage inductance: 14.7 mH Bandwidth: 10 Hz –0.2 dB / ~50 kHz –1 dB @ 1 watt (*) This does not exclude the possibility of use with other tubes.
	Dimensions (mm) L 85 H 100 S 104 F 68 F2 58

To order, contact me by clicking here.

Dimension caption

The Hi-Fi audio universe continues to evolve, pushing the boundaries of sound quality ever higher. In this context, we are excited to present our latest technological gem: the 6K6PP34/2 audio output transformer.

The 6K6PP34/2 is a creation designed for the most demanding audiophiles, carefully engineered to deliver an unparalleled listening experience. With a primary impedance of 6600 ohms and 43% ultralinear taps, this transformer is optimized for use with EL34, 6CA7, 6L6G, 6L6GC, KT66, and KT77 tubes.

One of the distinguishing features of the 6K6PP34/2 is its robustness and reliability. Tested up to 60 watts with KT66 tubes, this transformer demonstrates unmatched endurance without the slightest sign of stress. This translates into crystal-clear and powerful sound that satisfies even the most demanding audiophile tastes.

But its qualities don’t stop there. With a no-feedback bandwidth of 5 Hz to 40 kHz at –1 dB, the 6K6PP34/2 offers an extended and accurate frequency response, capturing every nuance and detail of the music with surprising precision. This allows enthusiasts to fully immerse themselves in their favorite music, discovering new levels of depth and clarity.

Secondary impedance options of 4, 6, and 8 ohms provide outstanding flexibility, allowing users to adapt the transformer to their own needs and system configurations with ease. Whether you enjoy classical, jazz, rock, or any other genre, the 6K6PP34/2 will perfectly match your setup, ensuring a no-compromise sound experience.

In conclusion, the 6K6PP34/2 audio output transformer represents the pinnacle of audio engineering and high-fidelity passion. With its exceptional performance and versatility, it is destined to become a reference point in the Hi-Fi world. We are excited to share this innovation with music lovers worldwide and to offer them a sound experience that will leave them speechless.

By clicking these links, you can see two projects that make use of this transformer: SB Settled34 and Mullard 520 Update 2020. Here is a comparison between the 6K6PP34/2 and a low-cost competitor transformer. Click here to learn more.

Check out our quantity discounts: by purchasing output transformers together with other components such as chokes or power transformers, you can benefit from a significant reduction compared to the unit price. See the discount proportions below and take advantage of our exclusive offers.

Model 6K6PP34/A
	Type: Push-Pull with 43% ultralinear taps Designed for tubes: EL34 / 6CA7 / 6L6 / 6L6G / 6L6GC / KT66 / KT77 (*) Primary impedance: 6600 ohm A/A Secondary impedances: 4 / 6 / 8 ohm Primary resistance: 95 + 95 ohm Rated power: 37 W RMS – tested up to 60 W with no measurable distortion Leakage inductance: 16 mH Bandwidth: 5 Hz – 40 kHz –1 dB @ 6 W (*) This does not exclude the possibility of use with other tubes.
	Dimensions (mm) L 120 H 113 S 117 F 98 F2 75

To order, contact me by clicking here.

Dimension caption

The 10KPP82 push-pull audio output transformer for ECL82/PCL82/6BM8 tubes is designed for tube-audio enthusiasts who want to achieve a warm, detailed sound. The transformer is intended for use in class-A push-pull configuration and can deliver 6 watts RMS output power.

Features:

• Primary impedance: 10 k? anode-to-anode
• Secondary impedances: 4/6/8 ohms
• Primary inductance: 92 H at 2 V, 100 Hz
• Leakage inductance: 47 mH at 1 kHz
• Primary DC resistance: 520 + 520 ohms
• GO-oriented grain core laminations
• 6 W RMS power capability
• Designed for ECL82/PCL82/6BM8 tubes
• Flexible secondary impedances

Winding the prototype transformer is a crucial step in creating a high-quality product. These photos show me at work, with precision and attention to detail, to ensure a result that meets my standards.

To ensure the quality of the push-pull audio output transformer for ECL82/PCL82/6BM8 tubes, I carried out a series of bench tests with real PCL82 tubes. These tests included frequency response measurements. In the photo you can see the push-pull audio output transformer for ECL82/PCL82/6BM8 tubes connected to a pair of PCL82 tubes on a test bench. This setup is representative of a typical tube amplifier for loudspeakers.

Frequency response graph

The zero-feedback frequency response of the push-pull audio output transformer for ECL82/PCL82/6BM8 tubes is 10 Hz to 45 kHz at –1 dB. This graph might appear unusual but has an explanation. The transformer was tested with pentodes connected as pentodes. The internal pentode of the PCL82 has an internal resistance of 16 k?. As explained in another article, with pentodes it is physically impossible to create transformers that are perfect at low frequencies. The primary inductance is never sufficient and, if you try to increase it beyond certain levels or use exotic cores, you encounter other issues such as saturation phenomena.

Nevertheless, achieving –1 dB at 10 Hz, even if the graph seems to fall slightly from 1 kHz downward, is an excellent result. It should be noted that, with 16 k?, the pentode section of the ECL/PCL82 is not as critical as an EL84 (38 k?).

It is therefore clear that this transformer must be used in a feedback-applied circuit. This is the proper way to operate any circuit using pentodes as output tubes. Without negative feedback, in fact, the damping factor settles at about 0.6, which is too low.

For those who may not yet appreciate it, at zero feedback this is a remarkable result. When used in a circuit with even minimal negative feedback, this transformer can deliver a full, uncompromised audio range.

Let’s also look at the square-wave response (1 kHz)

Typical connection diagram

The diagram shows how the push-pull audio output transformer for ECL82/PCL82/6BM8 tubes can be connected to a pair of output pentodes. This schematic is only indicative and can be adapted to specific project requirements, for example with fixed-bias operation.

Dimension diagram

Conclusion:

The push-pull audio output transformer for ECL82/PCL82/6BM8 tubes is a high-quality product that provides warm, detailed sound. It is an excellent choice for tube-audio enthusiasts who want to get the best performance from their system.