US Pentode | USA NOS Tube Pentode Colour Module
- Thermionic Valve Saturation Colour Module
- Class A Operation
- Pentode / Triode Mode
- Tube Compression Effect
- Adds Shine and Sparkles
- NOS Raytheon 6418 USA Made Tube
- Low Power Consumption
- Low Voltage – Safe to Use
- On-Board Regulator and Filters
- Compatible with DIYRE Colour Format
The US Pentode is a true Class A tube saturation Colour Module. The US Pentode is built with sub-miniature, NOS Raytheon 6418 USA Made Tube thermionic valve.
The US Pentode Colour Module can operate in Triode or the Pentode Mode. Each mode offers different sonic characteristic due to the unique harmonics content.
The Triode Mode has lower gain, produces mainly second harmonics and the sound is warmer and round.
The Pentode Mode delivers 3-4dB higher gain, overdrives a bit quicker, produces more of 3rd and 5th harmonics, enhancing details and adds the shine.
Both Operation Modes add organically occurring tube type compression.
The Module does not use any DC/DC converter and does not contain dangerous high voltage.
Tube Compression Effect
The US Pentode can work as the simple Tube Compressor.
When set to Low or Moderate Drive, the US Pentode acts like a compressor, limiting the peaks of the signal while enhancing the details.
The US Pentode can be very useful for recording vocals or any instrument.
Add a bit more drive and the recorded signal will sound crispy and alive.
The US Pentode will add the vintage Mojo to any recording.
The US Pentode Compared to the Soviet Pentode
The US Pentode Colour Module shares some similarities with the Soviet Pentode Colour Module.
Both Colour Modules have the Pentode/Triode selectable operation mode and can operate at lower, safe voltage without sacrificing the performance.
The difference is in the type of tonal results which both tube colour modules can provide.
The Soviet Pentode produces darker and bit lo-fi tone, especially in the Triode mode. If you are looking for an old-school sound for your synth or vocal, the Soviet Pentode is a perfect choice.
The US Pentode will produce more “Hi-Fi” tone, brighter, with a glass-like shine. If you wish to add some sparkles to the guitar or vocal, you should choose the US Pentode.
NOS Raytheon 6418 Miniature Valve
The US Pentode Colour Module uses the Low-Power NOS Raytheon 6418 designed for operation in Low-Voltage conditions.
The Tube is working according to the specification sheet producing a rich palette of harmonics.
HD Audio Samples
Stereo Samples recorded with C2584
All samples were normalised to the equal peek value level. Any subjective difference in loudness is a result of the compression produced by the US Pentode Colour Module.
Samples from the MP568C | US Pentode Video
Samples recorded with Neumann TLM102 Microphone.
Input Impedance: 10k
Gain: up to 4dB – Pentode Mode
Phase Reverse: Yes
Power Consumption: 20mA
Note: Due to the tolerance of parameters which may occur between NOS Raytheon 6418 tubes, the overall performance of the colour modules, including the output level, may slightly varry between the individual tube colour modules within the production batch.
The HRK US Pentode vs LTL Pentode Colour Module
HRK US Pentode
LTL Pentode Colour Module
|NOS Raytheon 6418||NOS Raytheon 6418|
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