12AX7S LA RADIOTECHNIQUE FRENCH TUBE PRODUCED FOR CSF- 1967 - FRS MILITARY CODES

Description

Radiotechnique of Suresnes France 12AX7S Military Tubes
Radiotechnique of Suresnes France 12AX7S Military Tubes
We are pleased to offer four individually listed Radiotechnique of Suresnes France 12AX7S military tubes made for the use and sale of CSF of St. Egreve. These tubes are rare and highly sought after by collectors and audiophiles for their exceptional quality and historical significance.
History of La Radiotechnique Tubes in France
La Radiotechnique (RTC)
:
Foundation
: La Radiotechnique, often abbreviated as RTC, was a prominent French manufacturer of vacuum tubes. The company was established in the early 20th century and quickly became a key player in the European electronics industry.
Specialization
: RTC specialized in producing a wide range of vacuum tubes for various applications, including radio, television, and audio equipment. Their tubes were known for their high quality and reliability.
Innovation
: Throughout the mid-20th century, RTC was involved in significant technological advancements, contributing to the development of improved tube designs and manufacturing processes.
Working Relationship with CSF (Compagnie Générale de Télégraphie Sans Fil)
:
Collaboration
: RTC had a collaborative relationship with CSF, a major French electronics company. CSF was involved in various sectors, including telecommunications, radar, and broadcasting. The collaboration between RTC and CSF helped advance the development and production of high-quality vacuum tubes.
Military and Industrial Applications
: CSF's involvement in military and industrial electronics meant that their tubes were often used in critical applications. The 12AX7S made by RTC were Military grade in and of themselves, and those that made the cut had 'FRS' military codes etched on them, indicating their use in military equipment, where reliability and precision were paramount.
12AX7S Tube
:
Designation
: The 12AX7S is a high-gain dual-triode vacuum tube, widely used in audio preamplifiers and other high-fidelity audio applications. The "S" often indicates a special or selected version of the standard 12AX7 tube, possibly denoting superior performance or military specification.
CSF Painted Codes
: Tubes with CSF painted codes signify their inspection and approval by CSF for use in their equipment, ensuring they met rigorous standards for performance and reliability. Although these don't bear any CSF markings, the original 5-pack of tubes has a purchase order detailing the purchase of these Military coded Radiotechnique tubes for resale by CSF at some point.
RTC Etched Military Codes
: The presence of RTC etched military codes on the 12AX7S tubes suggests they were manufactured to meet specific military standards, providing additional assurance of their quality and suitability for demanding applications.
Significance of RTC and CSF Tubes
Quality Assurance
: Tubes manufactured by RTC and approved by CSF were known for their exceptional quality. This reputation was crucial during a time when electronic reliability was critical for both civilian and military applications.
Legacy
: The collaboration between RTC and CSF contributed significantly to the development of the electronics industry in France and Europe. Their products, including the 12AX7S tubes, remain highly regarded by collectors and audiophiles for their historical and technical value.
Conclusion
La Radiotechnique (RTC) played a vital role in the development of high-quality vacuum tubes in France, with a notable collaboration with CSF ensuring their products met the highest standards. The 12AX7S tube, with its CSF painted codes and RTC etched military codes, exemplifies the excellence and reliability of tubes produced under this partnership. These tubes are highly valued for their performance and historical significance in the evolution of electronic technology.
Why Choose These RTC 12AX7S Tubes?
Historical Significance
: Produced by the renowned La Radiotechnique for CSF, these tubes are a piece of France's electronics history.
High Quality and Reliability
: RTC tubes are known for their robust construction, consistent performance, and long-lasting durability.
Rare and Collectible
: These military-spec tubes with RTC etched military codes are highly sought after by collectors and audio enthusiasts.
Amplitrex Test Results
TUBE for sale no. 1 of 4
DC Plate Current:
1.1 / 1.2
AC Plate Current:
0.15 / 0.15
Test Signal Volts:
0.1 / 0.1
Leakage:
NONE
Mutual Conductance (GM):
1500 / 1500 (NOS VALUE IS 1600)
Tube Gain (Mu):
88.2 / 88.2
TUBE for sale no. 2 of 4
DC Plate Current:
1.1 / 1.2
AC Plate Current:
0.16 / 0.15
Test Signal Volts:
0.1 / 0.1
Leakage:
NONE
Mutual Conductance (GM):
1600 / 1500 (NOS VALUE IS 1600)
Tube Gain (Mu):
84.1 / 83.2
TUBE for sale no. 3 of 4
DC Plate Current:
1.1 / 1.1
AC Plate Current:
0.14 / 0.15
Test Signal Volts:
0.1 / 0.1
Leakage:
NONE
Mutual Conductance (GM):
1400 / 1500 (NOS VALUE IS 1600)
Tube Gain (Mu):
82.3 / 83.2
TUBE for sale no. 4 of 4 (SORRY, THIS ONE IS SOLD)
DC Plate Current:
1.2 / 1.2
AC Plate Current:
0.16 / 0.15
Test Signal Volts:
0.1 / 0.1
Leakage:
NONE
Mutual Conductance (GM):
1600 / 1500 (NOS VALUE IS 1600)
Tube Gain (Mu):
88.8 / 93.7
No warranty is provided for these vintage tubes due to their age. However, we offer a 30-day return policy for defective tubes to ensure customer satisfaction. Please contact us within 7 days of receipt if you encounter any issues. Real issues only; subjective sound from tube rolling is not a legitimate return issue.
Note: Tubes 1 and 2 measure close enough for most to consider a matching pair; so if you buy more than one tube, there is a discount.
Don't miss this chance to own a piece of audio history with these rare and exceptional Radiotechnique 12AX7S military tubes. Their unique construction and historical significance make them a valuable addition to any collection.
Elevate Your Audio Experience – Own the Best of RTC and CSF Today!