Browse Categories

Genalex Gold Lion KT66 reissue - precision matched

Genalex Gold Lion KT66 reissue - premium matched
Manufacturer: Genalex Gold Lion (reissue)
These new production Genalex Gold Lion KT66 power tubes can be run in any amp that uses 6L6 or 5881 type tubes (if you want to sub KT66s for 6L6s, make sure your amp has room for their larger envelopes).

The Genalex KT66 tubes are a faithful reproduction of the tubes Eric Clapton used to achieve the famous "Bluesbreaker Tone." They were also used in favorite 1950-60 hi-fi amps such as the Heathkit W-5M and many Leak amplifiers. They
feature 3 getters for a superior vacuum, gold plated grid wire, heavy glass, and ruggedized plates.

These tubes have been burned in, tested at typical operating voltages on a laboratory grade Amplitrex AT1000, and precisely matched for both current draw (mA) and transconductance (Gm). Learn more about our burn-in and testing process here.

Price is for a single tube and includes burn-in and standard matching service. Tubes ship in Genalex Gold Lion retail boxes.

Precision Power Tube Matching

Our power tubes are burned in and then tested on a laboratory grade Amplitrex AT1000 tube tester. We match tubes for both current draw (mA) and transconductance (Gm) at typical operating conditions (plate: 350V, screen: 250V, grid bias: -18V).

After burn in and testing, we hand select and custom match every power tube order we receive. To do this, each power tube set is also run on a custom, fully variable test fixture that can match the operating conditions of your amplifier based on the information you provide below. This enables us to do a final check of the power tube set's performance and matching under load. Why this matters
1. What is the manufacturer and model of your amplifier?
2. How is your amp biased?   Why we ask
3. Matching notes   Why we ask
If you know the plate, screen, and grid bias voltages your amplifier uses, please note them in the comments section when you check out and we will use this information when we select and match your power tube set. (If you don't know, don't worry--we can make an educated guess based on your amp's make and model, if we don't already know the voltages it uses.) If you are a guitarist, you can also specify if you prefer early or late breakup. Thanks!


Price per single tube: $52.00
Sale Price: $41.60
on sale

Enter total number of tubes needed for your matched set

Related Products

GE 6L6GC - matched quad
GE 6L6GC - matched quad
Price: $249.00
GE 6L6GC - matched quad
The GE 6L6GC power tubes in this precisely matched quad have tall bottles, dual side getters, black bases, and the 188-5 factory code (Owensboro, Ky). Tubes test as new and are precisely matched for both current draw (mA) and transconductance (Gm).
Tung-Sol STR 6L6GC reissue - premium matched
Tung-Sol STR 6L6GC reissue - precision matched
Price: $28.00
Tung-Sol STR 6L6GC reissue - precision matched
These new production Tung-Sol STR 6L6GC power tubes are built to the same Special Tube Request specs of leading 1960s amp manufacturers. These 30 Watt power tubes are rated for 500 Volts, making them a great choice for demanding guitar amp circuits.
Tung-Sol 5881 reissue - premium matched
Tung-Sol 5881 reissue - precision matched
Price: $28.00
Tung-Sol 5881 reissue - precision matched
These new production Tung-Sol 5881 power tubes are based on the original 1960s Tung-Sol 5881. They are a 23 Watt 6L6GB equivalent rated for 400 V. Price includes extended burn-in and precision matching.
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.

Shopping Cart
Your cart is empty.