Groove Tubes Valves GT-12A-T7

Buy the Groove Tubes Valves GT-12A-T7 from Dolphin ...

• Online Price: £14.95 GBP (inc VAT)
• SRP: £14.95 GBP
• Euro Price: €18.90 EUR (1 GBP = 1.26444 EUR)
• Availability : 5 In Stock, usually dispatched within 24 hours.
• Manufacturer SKU: GT-12A-T7   Dolphin ID: 30824
• Postage will be £6.99 per order.

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12AT7. Used for phase inverters in many amps such as Fender Black and Silver Face, reverb drivers, etc.

This tube is used widely in most of the US-made amps and, in particular, the Fender amps. Fender amps with reverb use two 12AT7s - one for the reverb drive stage, and one used as a phase inverter to drive the push/pull output stage.

The 12AT7s make-up is very similar to the 12AX7 and can be substituted for a 12AX7 in a pinch, although it won't sound very good. Some players do prefer to use the 12AT7 in the driver stage in a Marshall for a cleaner, brighter tone. (The driver or phase inverter is the 12AX7 located nearest the power tubes.)

The 12AT7 is rarely used in a tone-generating stage, but rather in function stages, so this GT-12AT7 is selected for durability. The tube will some times bear the number 6201 as well as 12AT7. This is a special (and more expensive) production run with a rugged construction. The GT-12AT7 is tested under extreme listening conditions and guaranteed to be free of excess noise and microphonic ring.

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