#Gpower mono block.amp driver#
#Gpower mono block.amp manual#
#Gpower mono block.amp full#
#Gpower mono block.amp series#

The bias current can be adjusted by changing the current setting resistor and this will allow the use of many different power tubes. The elegance and sheer simplicity of this amplifier circuit will appeal to audio enthusiasts who prefer less components and circuitry in the signal path.Ī constant current source (CCS) consisting of a LM317HVT voltage regulator IC is used to force the output stage into class-A operation. There is only one DC blocking capacitor in the entire signal path of the circuit. Eliminating the phase inverter stage removes an entire active circuit from the signal path. Unlike conventional push-pull output stages, a phase inverter is not necessary here. The output stage is a Self Inverting Push-Pull (SIPP) amplifier which is based on the Compact Hi-Fi Power Amplifier by Melvin Leibowitz from 1961.

#Gpower mono block.amp driver#

Bruce indicated that the 5751 provided the best measured performance from the lot of driver tubes.

#Gpower mono block.amp full#

12AU7, ECC82 and ECC802S can also be used but will not be able to provide sufficient gain to drive the KT88 tubes to full power. Other input tubes can be used in the driver stage, the closest match being a 12AX7 which will provide more gain. The voltage gain (input) stage is a common Shunt-Regulated Push-Pull (SRPP) amplifier using a 5751 miniature dual triode valve.

#Gpower mono block.amp series#

You are free to use the schematic for personal, non-commercial use.įigure 1: OddBlock KT88 Series 1 Tube Amplifier Schematic Please note that this circuit is © OddWatt Audio and permission to host the schematic on this site has been provided by OddWatt Audio. The amplifier schematic is shown in Figure 1. SRPP and Class-A Self Inverting Push-Pull Topology

Power Consumption: 130 watts (each monoblock).Tubes: Gold Lion KT88, NOS JAN Philips 5751.Frequency Response: 8Hz to 20 kHz +0/-1db at any rated power.Distortion: less than 0.5% through half power, 1% at full power.Input Sensitivity: 1.5V (at rated power).The manufacturers specifications for the kit are as follows: Photograph 1: OddBlock KT88 Series 1 Tube Amp Kit Contents The enclosure is powder coated steel and includes a removable vented cover which can be used to keep curious hands and paws away from the very hot vacuum tubes. For tools you will need a soldering iron, screwdriver, pliers and wire stripper / cutter. All the parts required to build the tube amp are included.

#Gpower mono block.amp manual#

Not shown in the photograph is the comprehensive assembly manual which was provided through email. The kits were well packaged and there was no damage to the contents. The monoblock tube amp kits arrived about two weeks after placing the order in two double boxed packages, each package weighing about 6.4 kg (14 lbs.). The kits are available in two versions, KT77 rated at 15 watts and KT88 rated at 25 watts which I decided to try. Ever since we posted Bruce's first OddWatt project on the site I have communicated with a number of DIY hobbyists who have built the various OddWatt amplifiers and have had nothing but very positive comments about the sonic qualities of these tube amps. One of the advantages of hosting a hobby website is that you meet people through email who have similar interests as you.

1 x 790W Class G bridged mode (8ohm, 20Hz-20kHz, 0.5751 SRPP / KT88 Push-Pull Monoblock Tube Amplifier Kits.

2 x 225W Class G amplification (8ohm, 20Hz-20kHz, 0.2% THD).

With an impressive 380W per channel, the PA240 is designed to offer the greatest flexibility and power without compromising on control.įeaturing the best-in-class components including a toroidal based power supply, acoustically damped chassis, paralleled transistor output stages and exceptionally low levels of distortion, the PA240 masters the reproduction of music with all its originality and detail for an unmatched level of sound quality and clarity. The PA240 is a high-performance power amplifier that delivers 2 channels of efficient Class G amplification. The design of the HDA range draws upon all of Arcam’s experience as one of the UK’s most respected audio companies, to produce Arcam’s best performing range of audio products yet – using the best quality components and engineering practices, the HDA range is designed and built to give you years of listening enjoyment.

3,5mm Mini-Toslink to 3,5mm Mini-Toslink.