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Mullard 12AX7 / ECC83 - phono grade

Mullard 12AX7 / ECC83 - phono grade
Price: $89.00
1 in stock
Item Number: 554
Manufacturer: Mullard
Description

This 1978 Mullard 12AX7A / ECC83 tube was made in Great Britain (I63 series).
It has ribbed gray plates and a halo getter. The white print on the glass has the Mullard label. The Blackburn factory code etched in the glass.

Testing

This tube tests as new with high gain. It has been screened for gas, heater-cathode leakage, shorts, and excessive noise and microphonics on each triode section. It was tested at typical operating voltages on a laboratory grade Amplitrex AT1000 (manual setting, fixed bias mode). Learn more about our testing process here. See product options for current availability.
 
Noise and microphonics

This tube tests as “phono / V1 grade”—the quietest range for noise and microphonics—on our custom noise testing equipment. It is an excellent choice for sensitive applications such as microphone preamps, V1 position in guitar amps, DA converters, and phono stages.


Pricing

This tube is sold individually.
Matched pairs, when available, are listed as Item 685. Photo is of a sample from the lot. Tube ships in a new white box with test results for current draw (mA) and transconductance (Gm).

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The 1970s Mullard 12AX7 / ECC83 tubes in this precisely matched pair have short gray plates and halo getters (I63 series). The orange labels have the Amperex logo and the Blackburn, UK factory codes are etched in the glass. Click "more info" for details.
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Mullard 12AX7 / ECC83 - various labels, phono grade
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Mullard 12AX7 / ECC83 - various labels, phono grade
This 1970s Mullard 12AX7 / ECC83 tube has short gray plates and a halo getter (I63 series). The orange print on the glass has the Amperex logo and the Blackburn, UK factory code is etched in the glass. Tube tests as new with phono/V1 grade noise levels.
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Nov 22-27 will
ship Nov 28-29
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.

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