the ultimate guide to tube-rolling: EL34

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EL34 / 6CA7 / KT77

This power pentode tube with an international octal base was introduced in 1949 by Philips. It is now manufactured by JJ Electronic, Shuguang, Svetlana, and Reflector. All Upscale Audio power tubes are Platinum screened and tested. They are first burned in, and tested while hot at real-world-voltages. Pricing is per tube, but includes matching in any quantity you need.

Electro-Harmonix EL34

Electro-Harmonix EL34
$19.95

Kevin loves this tube. It has more energy than a Svetlana, so if you need a little more clarity and pop on top, this is the tube for you. 


Customer Reviews

Customers write in about a "spark of life"--a balanced sparkle and energy on top. "Powerful, linear, very detailed" says noted audio expert Bob Levi, and many customers refer to a real sense of live-ness and naturalness.

Electro-Harmonix 6CA7

Electro-Harmonix 6CA7
$22.95

Sonically similar to the EL34, but in a shorter, fat bottle design, so this is a good choice when you have a tight space for tubes in your component. Has clarity, and pop on top. 


Customer Reviews

Since it's similar, refer to the notes on the Electro-Harmonix EL34. Additionally, customers of this tube mention its dead-quietness, and a full, powerful signal.

Mullard EL34

Mullard EL34
$24.95

A modern re-creation of the classic Mullard, with great warmth, plenty of detail and a good amount of top-end extension.


Customer Reviews

Tight bass, sweet midrange that "gently reaches the highs". One customer reports that it's tighter than the PrimaLuna EL34 and reaches higher, but isn't quite as warm and lush. A customer with a bright system loves that he still has detail and bite, without harshness. There are many praises for the tube's balance and good soundstaging. 

Tung-Sol EL34B

Tung-Sol EL34B
$28.95

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Gold Lion KT77 / EL34