TOSHIBA 6AK5 VACUUM TUBE CHECKED TEKTRONIX 1969 LITTLE DOT SUPER SWEET TONE J12

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TOSHIBA 6AK5 VACUUM TUBE CHECKED TEKTRONIX 1969 LITTLE DOT SUPER SWEET TONE J12:
$20.00

TUBE HUNTER VACUUM TUBE GEMS

THESE ARE THE SPECIFICS OF THE TUBE/TUBES FOR SALE

THESE ARE THE TUBE/TUBES FOR SALE:

MANUFACTURER:

TOSHIBA

PRODUCTION CITY:

USA

TUBE TYPE:

6AK5

DESIGNATION:

CHECKED TEKTRONIX HEADPHONE HEAVEN

YEAR:

1969

MONTH:

NOVEMBER

Date code match

YES

SILK SCREEN CONDITION %:

100%

MICA:

PLATES:

BLACK

GM %:

121%, PAIR

GETTER:

O GETTER

DATE CODE

9K = NOV 1969

Here is a very old vintage set of Checked Tektronix Toshiba 6ak5\'s. Vintage 1969

will tickle your ears.....in a good way.

Whatdoes \"CheckedTube\"mean? Tektronix was the leader in high MEGAHZ machines.

They weredoing some really fast switching.Tektronix was building equipment

that was on the leading edge of tubetechnology. They did things that

required careful matching of tubecharacteristics, such as 18 tube

distributed vertical amplifiers.Some of their circuits, by virtue of their

being flat from DC to100MHz, or so required tubes that had unusually

stablecharacteristics.They needed the tubes to meet very high standards in some critical

circuits. At times only a single manufacturer made tubes that metthose standards. Because

of thesespecial needs, Tektronix had a department dedicated to testing

andmatching vacuum tubes. They assigned, special part numbers to

thesehighly tested and selected tubes.These tubes were selected by Tektronix for use

in critical sectionsof precision testing equipment. They were hand selected for GM valuesand

balance (within 2% per section).They also were checked forNOISE.They are the lowest noise

tubes you can find for the brand selected.That is what theCHECKED STICKERare all about.

Tektronix was very picky about the components thatwent into their equipment.

Theymade the VERY best test equipment of all time in my opinion.These tubes are an embodiment of that fact. Theysound great inmy headphone amp, and they will in yours!

Onmy tester a B&K 747 tester: Below 55 = BAD 55-65 = ?65 -100= Good 100-120+ = NOS

I want to see you happy with your purchase. I will never sell a tube that is below standard……

I have sold many tubes here on , and all my customers have been completely satisfied. I will work with you in good faith if there are any problems, or if you are unsatisfied in any way.

I want your business now and in the future, so I assume you are the boss, and I am the employee.

All tubes are tested for shorts, continuity, and emissions.

I prefer PayPal.