Home > Pre Tubes >

BRIMAR CV4033 - MINT NOS NIB Mid-Late 1960s Military Black Plate Prem. Grade Long Life ECC81/CV4024/12AT7 Halo Getter STC Prod. ENGLAND(Plug&Play Ready to Use) - M. Pairs/Quads/Singles
Brand New MINT NOS NIB Rare Mid-Late 1960s BRIMAR CV4033 Black Plate Military tubes. CV4033 Flying Lead is Premium Grade, High Reliability Long Life version of CV4024/6060/ECC81/12T7 valves. STC Rochester Plant Date Codes. Made in England.

Alternative Views:

Single Tube = $45.00
Stock Details: Tubes as Shown Available
For Matched Pairs or Quads: Select 2 For a Matched Pair or 4 for a M. Quad

Quantity in Stock:12
Product Code: 2041M

Description Technical Specs
NOTE: After spending $$$$ on tooling and various prototypes, we have fitted Special Grade Flying Leads tubes with Custom Bakelite Bases developed in-house. It is a multi-step, labor intensive process. Each lead is straightened and cleaned to ensure perfect fusion with the base pins in the soldering bath. Process is painstakingly slow, so we will be adding a few tubes at a time to the inventory.

Tubes are Plug & Play, Ready to Use,  fitted with our Custom made Bakelite Bases (INTL Patent Application in Process).

Brand New MINT NOS NIB Rare Mid-Late 1960s BRIMAR CV4033 Black Plate with Copper Grid Post Military tubes. CV4033 Flying Lead is a Premium Grade, High Reliability Long Life version of CV4024/ECC81/12AT7 valves (Click Here). STC Rochester Plant Date Codes are faint and painted on instead of etching in Brimar flying lead type, and may not be visible on all tubes.
Various dated acceptance stamps on the boxes are NOT the date codes and may be of later date. Made in England. Labels are a bit fragile on these tubes since the tubes can rub against the cardboard cone inside the box.

CV4033 premium grade version of the 1960s Black Plate CV4024/6060 is one of the best from Brimar in the ECC81 types (click Larger Photo).

Tested and matched on Hickok 752, just recently calibrated and modified by Hickok expert to all Solid State to eliminate drift. However, on average 12AT7 measures lower on this 752 than it should.

For comparison, 12AT7 measuring 4400-4400 on calibrated Hickok 600 measures 3300-3300 mmhos on this 752. Average new 12AT7 on Hickok 600 is 4000 mmhos. In other words, actual test scores are higher than what we have noted on the tube boxes.

Single Tube = $45. Select 2 for a Matched Pair or 4 for a Matched Quad. Even odd number of tubes will be matched.
Average Customer Review: 5 of 5 Total Reviews: 1 Write a review.

  0 of 0 people found the following review helpful:
Review of BRIMAR CV4033 tubes November 17, 2013
Reviewer: Don Sachs from Canada and US  
A bit of background.  I rebuild vintage tube amps and preamps for my living and while I work on anything with tubes I specialize in Harman Kardon Citation tube gear.  I have rebuilt over 40 Citation I preamps and have heard most of the 12AT7 variants in that preamp.  I would say the CV4033 is easily the best I have heard so far.  My previous favorite was the Brimar CV4024, but the CV4033 is better all around, more extended on top and in the bass.  The best way to describe the CV4033 is that is has the clean extended sound of a Telefunken married with a touch of British tube warmth and very clean and extended bass.  The Telefunken tubes can be a bit clinical sounding in some systems, but I doubt that would be a problem with the CV4033 from what I can hear.  It is a wonderful tube and has the best imaging I have heard to date of any 12AT7 variant in my system.   This pair is staying in my Citation I.

Don Sachs

Was this review helpful to you?

Browse for more products in the same category as this item:

Pre Tubes
Pre Tubes > 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 CV4033 13D9
PREMIUM Tubes > PREM. 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 CV4033
Prem Tubes (MULLARD-BRIMAR-GENALEX) F/Leads Plug&Play
Prem Tubes (MULLARD-BRIMAR-GENALEX) F/Leads Plug&Play > Flying Leads Plug&Play CV4033 - Premium 12AT7 ECC81 E81CC ECC801S 6201 6060 CV455 CV4024 type.