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.
Important User Note!
The US Pentode requires time to heat-up. Allow 5 minutes wait time to ensure proper operation of the Tube Colour Module.
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.
Drums - Dry
Drums - US Pentode - Triode Mode | Less Drive
Drums - US Pentode - Pentode Mode | Less Drive
Drums - US Pentode - Pentode Mode | More Drive
Drums - US Pentode + Discrete Line Driver - Pentode Mode | Less Drive
Stranger Synth - Dry
Stranger Synth - US Pentode - Pentode Mode | Less Drive
Stranger Synth - US Pentode - Triode Mode | Less Drive
Stranger Synth - US Pentode - Pentode Mode + Discrete Line Driver | Less Drive
Stranger Synth - US Pentode - Pentode Mode + Discrete Line Driver | More Drive
Bass Guitar - Dry
Bass Guitar - US Pentode - Triode | Less Drive
Bass Guitar - US Pentode - Triode | More Drive
Bass Guitar - US Pentode - Pentode Mode | Medium Drive
Bass Guitar - US Pentode + Discrete Line Driver - Pentode Mode | Medium Drive
Juno Synth - Dry
Juno Synth - US Pentode - Pentode Mode | Less Drive
Juno Synth - US Pentode - Triode Mode | Less Drive
Juno Synth - US Pentode - Triode Mode | More Drive
Juno Synth - US Pentode + Discrete Line Driver - Pentode Mode | Less Drive
Vocal Samples from the MP568C | US Pentode Video
MP568C + US Pentode | Pentode Mode | Medium Drive
MP568C + US Pentode | Pentode Mode | Medium Drive with Instrumental Track
Samples recorded with Neumann TLM102 Microphone.
The HRK US Pentode vs LTL Pentode Colour Module
HRK US Pentode
LTL Pentode Colour Module
|NOS Raytheon 6418
||NOS Raytheon 6418
Brand New, Assembled and Tested.
Every single HRK product is carefully tested with Audio Precision test equipment before the shipping to ensure hassle-free operation.
All Items are dispatched from the European Union within 1-3 working days.
We offer Fast & Free Worldwide UPS shipping with tracking.
FREE delivery is available for orders over the 249USD to EU, USA and Canada.
Total cart value / Delivery cost:
up to 99USD / Delivery Cost – 19.99USD
99 – 148USD / Delivery Cost – 14.99USD
149 – 248USD / Delivery Cost – 9.99USD
over 249USD – FREE Delivery
FREE delivery is available for orders over the 299USD to Australia, New Zeland, Japan and other destinations.
Total cart value / Delivery cost:
up to 148USD / Delivery Cost – 19.99USD
149 – 298USD / Delivery Cost – 14.99USD
over 299USD – FREE Delivery
Please check the shipping cost during the checkout.
Delivery to other WorldWide destinations – 24.99USD
VAT and Customs Fees
For non-business orders from the EU, the VAT will be added at the checkout.
VAT is removed automatically for orders from outside the EU.
No Custom Fees for EU Customers.
Orders from the USA below 800USD are customs tax free.
EU Business Customers
If you have the EU VAT number you can purchase the products available in the Bart HRK Shop with no VAT Tax.
Please enter your EU VAT Number at the checkout and the VAT will be deducted from the Total Payment.
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Customers from outside the EU can purchase the items with no VAT.
Please select the destination country and the VAT will be removed automatically.
If the VAT is not removed, please email customer service via the contact form and custom invoice will be issued.
Orders from the USA below 800USD are customs tax-free.
You can pay for your order with any Credit Card!
Our return policy is a part of the general Terms & Condition which you have to acknowledge at the checkout.
We stand for fair rules and a win-win approach. We understand that our customers may wish to return the product and we do provide such option. However, because we are a small company we can’t afford to run a grade B outlet shop like big distributors and provide the 30 days return period.
We can’t also scrap every returned unit. We could charge our customers more to offset the cost of the returns, this is what major distributors do. Or we can keep our prices low and hope that our customers will appreciate our policy.
This is why we provide the 7 days test period after receiving the package with the ordered items and if you wish to return the item we will accept the return request, providing that the item is not damaged and we can resell the product with the minimal loss for the company.
If the item is damaged during the transport we will do our best to help you and provide the replacement product.