KT88 / 6550

EH KT88 - PAIR

2 tubes, matched as pair

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 body ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

119,60 €
59,80 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
EH KT88 - QUAD

4 tubes, matched as quad

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 body ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

229,00 €
57,25 € per Piece

incl. VAT excl. Shipping costs
Quad:
 
EH KT88 - SINGLE

Single tube, not matched

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 body ensures long life and improved reliability. The perfect choice when the authentic sound is needed.

59,80 €

incl. VAT excl. Shipping costs
piece:
 
EH KT90 - PAIR

2 tubes, matched as pair

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.

139,60 €
69,80 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
EH KT90 - QUAD

4 tubes, matched as quad

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.

279,20 €
69,80 € per Piece

incl. VAT excl. Shipping costs
Quad:
 
EH KT90 - SINGLE

Single tube, not matched

This beam power tetrode can be used in place of 6550 and KT88. Sounds like great big EL34.

69,80 €

incl. VAT excl. Shipping costs
piece:
 
JJ 6550 - PAIR

2 tubes, matched as pair

Very credible 6550 so far.
We recommend this 6550 for bass amps which are working with 6550 tubes, especially Ampegs.

Files:

114,00 €
57,00 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
JJ 6550 - QUAD

4 tubes, matched as quad

Very credible 6550 so far.
We recommend this 6550 for bass amps which are working with 6550 tubes, especially Ampegs.

Files:

228,00 €
57,00 € per Piece

incl. VAT excl. Shipping costs
Quad:
 
JJ 6550 - SEXTET

6 tubes, matched as sextet

Very credible 6550 so far.
We recommend this 6550 for bass amps which are working with 6550 tubes, especially Ampegs.

Files:

339,00 €
56,50 € per Piece

incl. VAT excl. Shipping costs
Sextet:
 
JJ 6550 - SINGLE

Single tube, not matched

Very credible 6550 so far.
We recommend this 6550 for bass amps which are working with 6550 tubes, especially Ampegs.

Files:

52,00 €

incl. VAT excl. Shipping costs
piece:
 
JJ KT88 Red Label - PAIR

2 tubes, matched as pair

A powerfull bass with crystal clear highs - this is the KT88 by JJ. This tubes works perfect with any kind of KT88 / 6550 amp

Files:

115,20 €
57,60 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
JJ KT88 Red Label - QUAD

4 tubes, matched as quad

A powerfull bass with crystal clear highs - this is the KT88 by JJ. This tubes works perfect with any kind of KT88 / 6550 amp

Files:

230,40 €
57,60 € per Piece

incl. VAT excl. Shipping costs
Quad:
 
JJ KT88 Red Label - SEXTETT

6 tubes, matched as sextett

A powerfull bass with crystal clear highs - this is the KT88 by JJ. This tubes works perfect with any kind of KT88 / 6550 amp

Files:

345,60 €
57,60 € per Piece

incl. VAT excl. Shipping costs
Sextet:
 
JJ KT88 Red Label - SINGLE

Single tube, not matched

A powerfull bass with crystal clear highs - this is the KT88 by JJ. This tubes works perfect with any kind of KT88 / 6550 amp

Files:

57,60 €

incl. VAT excl. Shipping costs
piece:
 
Probe Bias Octal, assembled
Bias probe for indirect measurement of quiescent bias current of a tube. The adapter is inserted between the tube and the socket and gets connected to a standard voltmeter (not included). Pay attention to the quality of the measuring device and sufficiently charged batteries!

The quiescent current is measured indirectly via a precision resistor integrated in the adapter. The advantages of this measuring method are harmless voltages at the measuring plugs, which are in the mV range, as well as short ways for the current, since it does not need to be fed through the measuring device (common practice with many measuring adapters of Far Eastern production). As a result, there is no risk of oscillations of the amplifier which can lead to possible damage of the tubes or the amplifier itself.

Note: This adapter cannot be used when additional tube brackets are installed. These must be removed before using the measurement adapter and reattached after the measurement is complete.

Procedure for the measurement

Determine the resistance of the adapter, including the measuring leads. To do this, connect the adapter to the meter, but do not plug it between the tubes and the amplifier, yet. Select the measuring range “Ohm” on the meter and note the measured value, e.g. 1,1 ohms.

For the final measurement insert the adapter between the tube and the currentless amplifier and connect it to the meter, select the measuring range mV and switch on the amplifier. When the amplifier has reached a stable operating condition, read the value in mV from the meter and calculate the quiescent current based on Ohm's law.

Example:
measured voltage = 47 mV, resistance of the adapter = 1,1 ohms.
Formula (I = U / R) or in this case:
bias current (in A) = measured value (voltage in V) / measured value (resistance in ohm)
0.047V / 1.1 ohms = 0.042A or 42mA respectively

For the calculation of the correct bias current as well as further information on the bias measurement, please refer to further documents or the bias setting instructions in the info area, as well as the manual of the amplifier itself.

This measuring adapter is suitable for all EL34, 6L6, 6550, KT88, 6V6, 6CA7 and other tubes with the same pin layout.

Attention high Voltage! Measurements and work on tube amplifiers should only be carried out by qualified persons.
26,90 €

incl. VAT excl. Shipping costs
piece:
 
Psvane KT88 - Classic Series - PAIR
2 tubes, matched as pair

The Psvane KT88-C is a high-quality audio vacuum tube that impresses with its warm and transparent sound. Due to its robust construction and the use of high-quality components, the Psvane KT88-C offers an amazing sound reproduction, superior stability and high reliability, making it an ideal choice for high-end audio systems as well as guitar and bass amplifiers.
114,50 €
57,25 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
Psvane KT88 - Classic Series - SINGLE
Single tube, not matched

The Psvane KT88-C is a high-quality audio vacuum tube that impresses with its warm and transparent sound. Due to its robust construction and the use of high-quality components, the Psvane KT88-C offers an amazing sound reproduction, superior stability and high reliability, making it an ideal choice for high-end audio systems as well as guitar and bass amplifiers.
57,00 €

incl. VAT excl. Shipping costs
piece:
 
SED 6550 Winged C - PAIR
NEW

2 tubes, matched as pair

ORIGINAL SED 6550 Winged-C, NOS
Unused and tested, Emission min. 95%
Only while supplies last, very limited stock

239,00 €
119,50 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
Tung-Sol 6550 Reissue  - SINGLE

Single piece, not matched

Premium high-power Octal Beam Tetrode, among the finest in current production. Copy of the original Type 3 triple getter version popular in the 1960's. Powerful, balanced and detailed soundstage.

59,00 €

incl. VAT excl. Shipping costs
piece:
 
Tung-Sol 6550 Reissue - PAIR

2 tubes, matched as pair

Premium high-power Octal Beam Tetrode, among the finest in current production. Copy of the original Type 3 triple getter version popular in the 1960's. Powerful, balanced and detailed soundstage.

118,00 €
59,00 € per Piece

incl. VAT excl. Shipping costs
Pair:
 
Tung-Sol 6550 Reissue - QUAD

4 Tubes matched as quad

Premium high-power Octal Beam Tetrode, among the finest in current production. Copy of the original Type 3 triple getter version popular in the 1960's. Powerful, balanced and detailed soundstage.

236,00 €
59,00 € per Piece

incl. VAT excl. Shipping costs
Quad:
 
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