GEORGEPHILBRICK K2-W George Philbrick Tube Op Amplifier Ge 12AX7 5751

( Brand: Georgephilbrick ), ( Manufacturer Part Number: K2-W ), ( Type: Op Amp ), ( Custom Bundle: No ), ( Country/region Of Manufacture: United States ), ( Year Of Manufacture: 1952 )

Review GEORGEPHILBRICK George Philbrick Computer Tube Op amp K2 Ge Jan

The George Philbrick K2-W 12AX7 Tube Op-Amp, manufactured by Genalex in 1952 and designed by legendary audio engineer George Philbrick, is a true vintage treasure for audiophiles and sound engineers alike. This particular unit, a 5751 variant, is a testament to the golden era of tube technology.

The K2-W Op-Amp is housed in a sturdy aluminum enclosure, a nod to the durability and craftsmanship that characterized the era. Inside, the heart of the device is a pair of hand-selected 12AX7 tubes, each meticulously tested for their electrical characteristics to ensure optimal performance. The tubes are encapsulated in a vacuum to protect them from external contaminants and maintain their longevity.

The circuit design of the K2-W Op-Amp is a masterclass in simplicity and effectiveness. The single-stage design maintains a high degree of transparency, allowing the original signal to shine through without coloration. The input and output transformers, crafted with precision, provide a balanced, low-noise interface for your audio sources and destination equipment.

The K2-W Op-Amp exhibits a warm, rich sound characteristic of tube technology. It offers a smooth, natural frequency response, with a full and rounded bass, and a detailed, open midrange and treble. The tube's inherent distortion characteristics lend a subtle warmth to the sound, making it an excellent choice for a variety of applications, from vintage-style recording sessions to high-end audio systems.

In conclusion, the George Philbrick K2-W 12AX7 Tube Op-Amp is more than just a piece of audio equipment. It's a time machine that transports you back to the golden age of audio, offering a unique and captivating sound experience that can't be replicated by modern solid-state technology.

1. Historical Significance: The George Philbrick K2 tube op-amp is a vintage piece of audio equipment, which has a significant historical value in the field of audio engineering.

2. Warm and Tubey Sound: Tube-based op-amps like the K2 are known for their warm, tubey sound, which can add a unique character to audio signals.

3. High-End Sound Quality: The K2 is a high-end tube op-amp, which can provide a rich and detailed sound quality that is often preferred by audiophiles.

4. Collectible Value: The K2 is a collectible item, which can appreciate in value over time, making it a potential investment for audio enthusiasts.

1. High Cost: The K2 is a high-end tube op-amp, which can be quite expensive to purchase.

2. Maintenance and Repair: Tube-based op-amps require regular maintenance and can be prone to failure, which can be expensive to repair.

3. Incompatibility with Modern Equipment: The K2 may not be fully compatible with modern audio equipment, which can limit its usability.

4. Power Consumption: Tube-based op-amps consume more power than solid-state op-amps, which can increase energy costs.

The George Philbrick Tube Op-Amp K2 is a vintage piece of audio equipment that offers a unique sound quality and historical significance. However, its high cost, maintenance requirements, potential incompatibility with modern equipment, and power consumption are all factors to consider before making a purchase. If you are an audio enthusiast or collector, and you are willing to invest in a high-end tube op-amp, the K2 could be a worthwhile addition to your audio equipment collection.

If you are interested in purchasing the George Philbrick Tube Op-Amp K2, I would recommend doing thorough research first. Make sure you understand the pros and cons of tube-based op-amps, and consider whether the K2's unique sound quality and historical significance are worth the investment for you. Additionally, make sure to budget for regular maintenance and potential repairs, and consider whether the K2 is compatible with your current audio equipment. If you are still unsure, I would recommend reaching out to audio experts or other audio enthusiasts for their opinions and experiences with the K2.

Details:

Philbrick researches, inc, Boston 16 mass. It is clean and in excellent condition.

The green sylvan designations are worn, but readable, 5751 designation also appears in standard etching numerals, visible photos and much clearer. The silver flashing looks good on both tubes.

The octal base and its pins are also clean in good condition. These two have dark grey ribbed plates and top round fetters. It was, in 1952, the first full differential un stabilized op amp.

The tubes are tested, but op itself is not. Each tube is tested OK on my Eco dynamic tester and they show no shorts or inter electrode leakage. The tubes are also clean and in good condition. Up for bids is the george.

Philbrick tube type op amp, K2-W. The op has its original factory tags, reading as follows: gap r model K2-W and george. These units seldom come up for buying in this nice condition.

specifications vintaelec:

• brand: Georgephilbrick
• mpn: K2-w
• type: Op Amp
• custom bundle: No
• country/region of manufacture: United States
• year of manufacture: 1952

General vintaelec:

• in stock: Yes
• Vintage Computing > Vintage Parts Accessories

Returns vintaelec:

• paid by: Buyer
• type: Money Back
• time: 30 Days
• policy: returns accepted

Offer vintaelec:

• quantity: 1
• bids: 0
• Started: November 15, 2018, 8:00 pm
• Sold: 0
• min. bid: $9.99
• best offer: false

Shipping vintaelec:

• handling: days
• type: Calculated

Seller vintaelec:

• # feedbacks 11-15-18: 4664
• zipcode: 18625
• city: Lake Winola, Pennsylvania
• rating 11-15-18: 99.5%

Payments vintaelec:

• PayPal

Ratings:

1. Item condition as described and shipped promptly 11-12-18
2. Great condition, shipped quickly. 11-06-18
3. iiiiiii Perfect !!!!! Thank you very much !!!!!! 11-13-18
4. Fast, easy transaction. Thanks 11-11-18