Ultra-long life, top-quality construction, and superior sonics make it the finest 300B available today. Like the original Western Electric 300B, it has the 8 course directly heated filament, 40 watt plate dissipation, classic large shoulder tube glass, and are available singly or in precision matched pairs. The 300B EH´s plate curves and static DC characteristics (plate resistance, transconductance, mu) also exactly match the originals so you can drop them into any vintage or modern 300B amp and realize the finest performance of any 300B made today.
The 6550EH is the finest current production tube for any amp using 6550 or KT88. The 6550EH offers the maximum power of any 6550 with the linearity guitar and bass players want. With 42 watts of plate dissipation in tetrode operation and 44 watts in triode, the 6550EH offers an improvement in power over even the most desirable vintage types including the Tung-Sol 6550 and Genelex KT88. This extra headroom in a 6550EH equipped amp means bass players can finally realize the full dynamic range of the instrument and the sweetest tone available.
The extra ruggedness of the 6550EH was engineered with the punishing abuse of guitar amps in mind. The nickel steel side rod mica supports ensure that the 6550EH will hold up in even the most punishing environment of high powered bass amps like the Ampeg SVT and combos where the tube is only inches from the speaker and still deliver the sweetest tone of any 6550 or KT88. The 6550EH will greatly improve the performance of any amp using 6550’s but can also replace the KT88 in any application.
New military EL34 !
Designed to the exacting specifications of the Philips 6CA7, this classic tetrode returns to life on a big bottle design. The 6CA7EH is built to withstand today´s high gain amps while still retaining the detailed tone and component integrity of the original. A direct replacement, with military reliability, for any EL34.
Better than the RCA!
Modeled after the vintage RCA 6L6GC "blackplate," the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica spacers with metal springs to eliminate tube rattle and microphonics. The 6L6EH offers tone and performance superior to any other 6L6 or KT66 type.
Sweet, singing tone, perfect for Fenders! (and better than most NOS !)
The all new 6V6EH combines a specially developed cathode coating, careful alignment of the grid, and tri-alloy plate material to create a rugged, wonderful-sounding 6V6 that performs flawlessly up to 475 volts. Perfect for high plate voltage amps like the Fender Deluxe Reverb.
On special order only
Tired of saying "fuggettaboudit," "can´t get 'em," "UNOBTANIUM!"? Well, now we got 'em. And they're for real! Smooth, yet punchy, with a sweet harmonix finish, this year's vintage from New Sensor. Ampeg owners, rejoice!
Electro-Harmonix 7591A EH's are available in platinum matched sets. Our platinum matching process consists of a 24 hour tube burn-in period followed by a bias (plate) current measurement in milliamps. Please specify matched tube grouping (ie. pair, quad, sextet, etc.) when ordering (no odd-quantity groups, please).
Equivalent: KT77, 6CA7
The new Electro-Harmonix EL34EH is extremely musical and predictable with a sound that is rich, smooth, and highly detailed without being edgy. It is the perfect EL34 for vintage equipment and a sure way to improve the performance of modern equipment.
According to the technical journal, Vacuum Tube Valley, the "...new EL34[EH] comes very close to the sonics of a Mullard EL34..." They go on to say, "The Electro-Harmonix tube is balanced throughout the entire music spectrum. Bass goes deep and is tight, mids are sweet and well defined and highs are detailed and extended."
Equivalent: 6BQ5, 7189
The new EL84EH faithfully recreates the classic Mullard design. Tri-lam plate and selected screen wire increase thermal dissipation. The EL84EH is a remarkable reproduction of a vintage tube and is capable of maintaining its sweet and musical tone under any voltage conditions.
New ! Equivalent: 6550
KT88 EH is here. A new geometry is utilized to reduce odd-order harmonics for a sweet top end while the peak power is extended to improve low frequency response. Our new glass formula ensures long life and improved reliability. The perfect choice for authentic sound. Forget Genelex!