Very rare 1969 "A" NOS MULLARD Blackburn GZ34 5AR4 f32 Matched pair SAME CODE ! PERFECT balance, super strong

Here for sale an really awesome "A" NOS Mullard GZ34 5AR4 perfect matched pair ( "A" NOS for Almost new old stock) They've played a very short period of time in an HIFI tube amp prior to a new retest session and are in perfect like new condition.

tube 1 code F32 B9C1 105 % 104 %

tube 2 code F32 B9C1 105 % 105 %

Philips Miniwatt yellow label but genuine Mullard both made in the Mullard Blackburn factory the first week of march in 1969 in the UK. They are from the same batch and have of course same Mullard date and factory

One of the most sought after model the early F32 version, single top ring getter 7-ribbed plate side, inner copper foils with red shining copper plate borders    :) Also called "the red line"
 
Both tubes have splendid wide, shiny mirror like getter flash.
Super strong and can't be better balanced and matched
.
Considered as one of the best and more robust GZ34 . Amazing construction, real master piece of tube engineering . I really love these Blackburn F32 with inner copper in plate.  Highly recommended to get the best of your power section.

In case you need only a single I can probably provide a similar one, just ask. but I prefer break this perfect pair.

 No short
 No leaks  no issue                      
  I COMBINE SHIPPING ,

  SO PLEASE HAVE A LOOK AT MY OTHER ITEMS AND SAVE .

Fully tested onJackson 648S for

Filament

Circuit

Shorts

Plate

Life test...

The Jackson 648. It is definitely one of my favorite tube testers. While it does not employ a mutual conductance test circuit, it does use an advanced emission circuit that applies separate element voltages to each tube element, and separate load circuits are also used. “These voltages and loads have been carefully selected for each tube to meet most ideally the normal operating condition of the tube.” (Source: 1950 Jackson catalog.)

In my experience, the Jackson circuitry is very effective, and often will surprise you with accuracy that approaches Hickok’s coveted “mutual conductance” test method. ( Source tubesound web site.)

I do my best to test and describe the tubes the best I can.

Note that test results may vary from one tester to an other so this must be taken as an indication, although my jackson is regulary tested for calibration.

 Photos are part of the description you get what you see.

Private sale so no guarantee or return please.

But if any problem (never happened yet ) please contact me first.

Thank you for your interest