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Details about  NOS 1974 GE 5751 CV4017 12AX7 MUSEUM CERTIFIED AMPLITREX TESTED SINGLE TUBE WOW

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NOS 1974 GE 5751 CV4017 12AX7 MUSEUM CERTIFIED AMPLITREX TESTED SINGLE TUBE WOW
NOS-1974-GE-5751-CV4017-12AX7-MUSEUM-CERTIFIED-AMPLITREX-TESTED-SINGLE-TUBE-WOW
Item Sold
Item condition:
--not specified

1,600/1,500 mA/V & 2.3/2.2 mA in the 12AX7 settings! 0.8/0.8mA & 1,100/1,100 GM in the TRUE

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Ended:
Jul 21, 2014
Price:
US $119.50
Shipping:
FREE Standard Shipping | See details
Item location:
Tuxedo Park, New York, United States

Description

eBay item number:
290869258016
Seller assumes all responsibility for this listing.
Last updated on  Jan 09, 2014 13:18:42 PST  View all revisions

Item specifics

Seller Notes: 1,600/1,500 mA/V & 2.3/2.2 mA in the 12AX7 settings! 0.8/0.8mA & 1,100/1,100 GM in the TRUE 5751 settings! NOS Excellent performance, smooth highs, SRV Chime-Tone WOW
Type: 12AX7 LOWER-GAIN DIRECT REPLACEMENT Grading: NOS-LOW-NOISE NEW IN BOX
Brand:

GE

Tube Type: 5751 = CV4017
Country of Manufacture: United States EXCELLENT IN FENDER AMPS:: BASSMAN, DELUXE, SUPER
Product Type: USA MADE VACUUM TUBE Model:

5751

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Positive feedback rating great ebayer,fast shipping excellcen item, 5star . May-11-11 23:13
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967) US $184.98

Positive feedback rating Immaculate condition and received really quickly. Thanks will buy from you again Buyer: May-02-11 23:16
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967) US $184.98

SquareTrade ©
Positive feedback rating  excellent TUNG-SOL 5751, fast delivery, will do biz again ++++++ Buyer: Feb-05-11 14:50
  NOS 1960 TUNG-SOL 5751 12AX7 GRY-P 2Mica O for Dr.Z Amp (#290440342313)
AP6.0

 

Positive feedback rating  A+ Seller Buyer: Jan-13-11 19:08
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967)

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PRICE IS EACH TUBE!  BID 1 FOR THE SINGLE TUBE!

NOS NIB1974 GE 5751 

  How many times have you purchased what you read advertised as a balanced and matched-triode tube on eBay and have received mismatched or marginal tubes? Well, get rid of those! Here are the HIGHEST QUALITY AMPLITREX DIGITALLY TESTED NOS (NEW OLD STOCK) NIB (NEW IN BOX) GE USA 5751 tubes that were made in the 1970's that will end your search for the Top Quality you would expect from a Premium tube in your ultimate HI-FI AMPLIFIER or Musical Amplification system.

 NOS NIB TUBE MUSEUM QUALITY

1974 NOS GE USA 5751

MUSEUM-CERTIFIED 

AMPLITREX-TESTED

12AX7 SUBSTITUTE 

5751 = CV4017


This tube has the GE acid codes shown as in above picture and Made in USA in 1974. 

These tubes actually have 4 mica spacer insulators! (2 doubled-up mica insulators on the top and 2 mica insulator on the bottom) but we will call these 2-mica or double mica tubes - this doubling up of the top and bottom mica adds to the CV4017 "ruggedized" construction classification of all 5751 tubes capable of being held in 3 different positions in a Navy type (flyweight) Shock Machine and are subject to 600 g impact acceleration & 2.5 g vibrational acceleration at 25 cycles for 32 hours in GE Military Spec Factory testing and burn-in.

1974 NOS GE USA 5751 

"O" or Halo Shaped Getter Ring

Gray-Plate Double-Mica

Made in USA WITH "74 - 49" CODE = "1974" GE USA


Beautiful 1974 vintage with stapled reinforcements and extra thick micas 


All are Actual Pictures of the GE "USA 74 - xx CODE" 5751 CV4017 Military rarely seen NOS TUBE - with their Original Military Boxes

The CV4017 is the BEST SUPER 5751 MADE TO STRICT RUGGEDIZED MILITARY SPECIFICATIONS!

The CV4017 or 5751WA was mae for Military and the Government and boasted the highest quality "ruggedized" construction of all 5751 tubes capable of being held in 3 different positions in a Navy type (flyweight) Shock Machine and are subject to 600 g impact acceleration & 2.5 g vibrational acceleration at 25 cycles for 32 hours in Tung-Sol USA Military Spec Factory testing and burn-in

1974 NOS GE USA CV4017 5751 

Special ruggedized tube. Specification similar to 12AX7, dual high-gain triode. Mu lowered to 70, heater current raised to 175mA per section. Heaters can be parallel connected for 6.3V, 350mA operation 


SIMPLY the PERFECT REFERENCE 5751 AMPLITREX TESTED TUBE MATCHED BALANCED PAIR BY WHICH ALL OTHER GE USA 5751/CV4017's CAN BE MEASURED BY! 


Comes in it's (OVP) ORIGINAL VENDOR PACKAGING GE Box as shown

1974 NOS GE USA CV4017 5751 

CERTIFIED ULTRA-LOW-NOISE SPECIMEN

TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be.

Measures VERY STRONG above 100% GM @ 1,600/1,500 uMhos (mA/V) per triode which is Balanced & Matched and > 100%/100% mA of 1.2mA/1.2mA - in the 12AX7 settings

Side 1 triode of tube

0.8/0.8mA & 1,100/1,100 GM tested in the "TRUE" 5751 settings! 

side 2 triode of tube

MUSEUM-CERTIFIED 


same tube tested as a 12AX7 in the fixed-bias mode

AMPLITREX-TESTED

THE 28-POINT AMPLITREX TEST DATA-RESULTS AS DISPLAYED

Spec on a 5751 CV4017 is high @ 1,200/1,200 per triode & 1.2/1.2mA

Tube # 1: 1,600/1,500 mA/V & 2.3/2.2 mA in the 12AX7 fixed-bias settings

0.8/0.8mA & 1,100/1,100 GM in the TRUE 5751 settings! 

 What I like about these tubes is that they are all Matched & Balanced in Mutual Conductance with Uniquely Matched Plate-Resistance (Rp)& matched Tube-Gain (Mu) These are Beautiful PROPERLY PRESERVED & STORED 50 YEAR OLD NOS (NEW OLD STOCK) NEVER USED NEW IN BOX (NIB)

MADE IN USA SUPER STRONG TUBES!

5751 = 1,200/1,200 = 100% Hickok Recommended uMhos / 1,0/1.0 mA = 100% 

 MATCHED PLATE RESISTANCE and MATCHED TUBE GAIN ON BOTH SIDES!

TESTED AT REAL-WORLD POWER LEVELS ON AMPLITREX AT-1000

ALL TUBES OFFERED TEST BALANCED & MATCHED WITH MATCHED PLATE RESISTANCE and MATCHED TUBE GAIN ON BOTH SIDES!

Tested on Amplitrex AT1000 Digital Tube Test System

..." * Rp or plate resistance is the second most important parameter as it directly affects the output impedance of the preamp. Circuit designers are looking at Mu primarily, Rp next and we hardly care about Gm at all. Why then do most vendors measure Gm and Gm alone? Because most testers only measure Gm! No commercial tester ever measured Mu either (until the AMPLITREX AT1000 was introduced.) And even the Hickock, treasured for measuring Gm, doesn’t measure it meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift).'"...

This tube is known for excellent performance, smooth highs, outstanding 3-D holographic soundstage, lots of open-air, inner detail, and overall perfect resolution and balanced sound.

CV4017 Substitutes

Close or identical

5751

Different rating or performance

12AX7, 12AX7A, 12AX7R, 12AX7S, 12AX7WA, 5751WA, 6057, 6681, 6L13, 7025, 7382, 7494, 7729, B339, CK5751, CV10319, CV4004, CV492, CV8156, CV8222, CV8312, E2164, E83CC, ECC803, ECC803S, ECC83, ECC863, M8137, QB339

"EXPRESS SHIPPING" required for certain countries, (check first before you bid or we reserve the right to cancel your bid)

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Positive feedback rating  A+ Seller Buyer: Jan-13-11 19:08
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967)

Positive Feedback Received Awesome seller, asset to ebay, great communication, quick delivery, thank you Buyer: ramb68 (26Feedback is 10 to 49)

"... Hi Mark, just wanted to thank you for ...  the 5751. My God, what a tube! I've never used one before and the difference is just amazing. Makes my '66 Super Reverb just sing and brings out the clean tones beautifully while still attaining that nice breakup that Supers are known for. This tube with a Stratocaster is pure Heaven! I had a Mullard ECC83 in the V-1 spot. It is now owned by this 5751! I can see why Stevie Ray used this tube! Thanks once again for all your help and turning me on to yet another tone color through the use of incredibly fine tubes! You guys are the best and not just on the 'net. Jim ..."

-repeat-performance

Positive feedback rating These guys go out of their way to make every deal smooth, perfect! Thx Mark!! Buyer:

PRICE IS EACH TUBE!


 

Positive feedback rating excellent TUNG-SOL 5751, fast delivery, will do biz again ++++++ Buyer: Feb-05-11 14:50
  NOS 1960 TUNG-SOL 5751 12AX7 GRY-P 2Mica O for Dr.Z Amp (#290440342313)

Positive feedback rating Immaculate condition and received really quickly. Thanks will buy from you again Buyer: May-02-11 23:16
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967) US $184.98

Positive feedback rating great ebayer,fast shipping excellcen item, 5star . May-11-11 23:13
  NOS 1960 TUNG-SOL 5751 CV4017 12AX7 GRY PAIR 2Mica O (#230481531967) US $184.98



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Member Id: dhmbcl500 ( 81Feedback score is 50 to 99) US $184.98 2 May-09-11 01:01:47 PDT 94607-4220
 Member Id: nexus1951 ( 26Feedback score is 10 to 49) US $184.98 1 Apr-29-11 02:29:41 PDT Italy
 
 Member Id: hugo_wilco ( 8 ) US $184.98 1 Apr-22-11 03:41:32 PDT Australia

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