Below is a Blue Note-style authentication report based on the documented specifications of the RedPlate Cosmic Dust and the condition/originality information you provided. I have deliberately separated factory-documented specifications from items that should be verified directly from the individual amplifier, such as serial number, transformer codes, tube brands, and chassis markings.

BLUE NOTE MUSIC

VINTAGE & BOUTIQUE AMPLIFIER AUTHENTICATION REPORT

REDPLATE COSMIC DUST

All-Tube Boutique Amplifier Head

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1. AMPLIFIER IDENTIFICATION

Manufacturer: RedPlate Amps
Model: Cosmic Dust
Configuration: Head
Amplifier Type: Tube / All-Tube
Country of Manufacture: USA
Manufacturer Founded: 2006 — Phoenix, Arizona
Builder/Designer: RedPlate Amps / Henry Heistand and Keith Entringer
Production Status: Discontinued Model
Construction: Hand-wired, eyelet-board construction
Printed Circuit Boards: None in the RedPlate construction philosophy
Condition: Excellent
Originality: All Original — based upon inspection information supplied
Authentication Status: AUTHENTIC REDPLATE COSMIC DUST

RedPlate Amps identifies the Cosmic Dust as one of its discontinued amplifier models. RedPlate describes its amplifiers as hand-built boutique instruments utilizing eyelet-board, point-to-point construction rather than printed circuit boards. (Redplate Amps)

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2. FACTORY SPECIFICATIONS

POWER SECTION

Primary Output Power: Approximately 45 watts
Low-Power Mode: Approximately 18 watts
Power Tubes: 4 × 6V6
Bias: Fixed bias
Bias Adjustment: External test point and adjustment
Power Reduction: Selectable low-power operation
Output Configuration: Push-pull, four 6V6 output stage

The Cosmic Dust is documented as a 45-watt amplifier utilizing four 6V6 power tubes, with an approximately 18-watt reduced-power setting. (reverb.com)

PREAMP

Preamp Type: Multi-stage tube preamp
Gain Architecture: Cascaded three-stage design
Primary Voicing: American/Fender-derived clean platform with multiple voicing options
Drive Architecture: Two independently controllable overdrive sections
Overall Character: Clean American-style tones through high-gain, Dumble-influenced overdrive tones

The Cosmic Dust's architecture is based around a three-stage preamp, with two switchable/controllable drive stages that can be incorporated into the signal path. (reverb.com)

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3. CONTROL & FUNCTIONAL SPECIFICATIONS

CLEAN / PREAMP SECTION

Volume
Controls the primary clean/preamp output level.

Tone
Controls the overall preamp tonal balance.

6-Position Mode Selector
Provides six different midrange/voicing characteristics.

The documented Cosmic Dust design incorporates Fender-inspired Blackface, Brownface, and Tweed-type tonal variations through its multi-position mode circuit. (reverb.com)

DRIVE #1

Gain
Controls the amount of signal entering the first overdrive stage.

Drive
Controls the degree of distortion/saturation.

Level
Controls the output level of Drive #1.

Pull Functions:

• Midrange shift

• High-frequency smoothing

Drive #1 is designed to progress from mild breakup through substantially saturated overdrive. (Redplate Amps)

DRIVE #2

Gain
Controls gain entering the second overdrive section.

Drive
Controls saturation and distortion.

Level
Controls output level.

Treble
High-frequency response.

Middle
Midrange response.

Bass
Low-frequency response.

Drive #2 incorporates its own tone stack, giving the amplifier substantially greater tonal flexibility than Drive #1. (Redplate Amps)

MASTER / OUTPUT SECTION

Presence
Controls upper-frequency feedback character.

Master Volume
Controls overall amplifier output through the active effects-loop/master-volume architecture.

The effects loop incorporates a tube-buffered design and active master-volume function. (Redplate Amps)

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4. SPECIAL FEATURES

The Cosmic Dust incorporates an unusually extensive collection of voicing and gain controls for a single-channel boutique amplifier.

Bright Switch

Three-position bright response selection.

Humbucker Switch

Provides an input-stage adjustment intended to accommodate different pickup output characteristics, particularly higher-output humbuckers.

Smooth Switch

Provides two degrees of input-stage compression/smoothing.

Tone-Stack Lift

The Tone control can be defeated to remove the tone stack from the signal path and provide additional boost.

Presence Defeat

The Presence circuit can be defeated, removing the negative-feedback component associated with the presence function.

Six-Position Mode Selector

Provides six distinct midrange/voice characteristics spanning American-style Tweed, Brownface and Blackface-inspired voicings.

Tube-Buffered Effects Loop

Provides buffered effects-loop operation with an active master-volume architecture.

These features are consistent with documented Cosmic Dust specifications and RedPlate's design philosophy. (Redplate Amps)

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5. TUBE COMPLEMENT

Power Tubes

4 × 6V6

The four-6V6 configuration is a defining characteristic of the Cosmic Dust platform and permits the amplifier's approximately 45-watt and approximately 18-watt operating modes. (reverb.com)

Preamp Tubes

12AX7-family tubes

Historical documentation and secondary-market examples identify multiple 12AX7 preamp tubes in the Cosmic Dust platform. The exact quantity and current tube brands should be recorded from the individual amplifier rather than assumed from model-level documentation.

Blue Note Tube Verification:
Tube brands, date codes, and current tube complement should be documented separately during physical inspection.

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6. EFFECTS LOOP

Type: Tube buffered
Master Volume: Active
Purpose: Provides buffered integration of external effects while maintaining appropriate signal levels.

This is a significant design feature of the Cosmic Dust and is part of the amplifier's original factory architecture. (reverb.com)

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7. REVERB

Reverb: NONE

This is an important model identification characteristic.

The Cosmic Dust should not be confused with the later/larger AstroDust, which incorporates an all-tube reverb section. RedPlate's current documentation identifies Cosmic Dust as a discontinued model, while AstroDust is a separate model with reverb and other expanded features. (Redplate Amps)

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8. CABINET / HEAD CONSTRUCTION

Configuration: Separate amplifier head
Construction: Hand-built boutique construction
Chassis Construction: Traditional tube-amplifier chassis architecture
Circuit Construction: Eyelet-board / point-to-point hand wiring
Cabinet: Factory RedPlate head cabinet
Exterior Condition: Excellent
Structural Condition: Excellent
Modification Evidence: None reported
Restoration Evidence: None reported

RedPlate states that its amplifiers are constructed using eyelet-board point-to-point wiring and specifically rejects PCB-based construction as part of its design philosophy. (Redplate Amps)

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9. ORIGINALITY ASSESSMENT

Overall Originality: VERIFIED / APPEARS ORIGINAL

Based upon the inspection information supplied for this amplifier:

• Chassis: Original

• Cabinet: Original

• Circuit: Original

• Transformers: Original / consistent with factory construction

• Controls: Original

• Switches: Original

• Hardware: Original

• Wiring: Original

• Circuit Components: Original

• Tube Layout: Factory configuration

• Modifications: None identified

• Major Repairs: None identified

• Rebuild Evidence: None identified

Originality Classification:

ALL ORIGINAL — EXCELLENT CONDITION

Because RedPlate itself cautions that used amplifiers can be modified by previous owners and that the company cannot verify the history of secondary-market examples, Blue Note's originality determination should be understood as an inspection-based determination of the specific amplifier rather than a manufacturer's historical provenance statement. (Redplate Amps)

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10. CONDITION ASSESSMENT

CONDITION GRADE: A

Excellent / Collector-Quality Player Condition

The amplifier is reported to be in excellent condition with no identified modifications.

Cosmetic Condition

Excellent

Minimal signs of use with the amplifier retaining its original appearance and presentation.

Structural Condition

Excellent

No structural defects reported.

Electrical Condition

Excellent / Fully Functional

No electrical abnormalities reported.

Originality

Excellent

No modifications identified.

Collectibility

High

The Cosmic Dust represents a discontinued RedPlate design combining multiple American-style clean voices with sophisticated boutique overdrive architecture in a relatively uncommon hand-built amplifier platform.

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11. AUTHENTICATION CONCLUSION

After review of the manufacturer's published information, historical RedPlate documentation, documented Cosmic Dust specifications, and the inspection information supplied by Blue Note Music, this amplifier is consistent with an authentic:

REDPLATE COSMIC DUST

Configuration: Head
Power: Approximately 45W / 18W
Power Tubes: 4 × 6V6
Circuit: All-Tube
Construction: Hand-Wired / Eyelet Board
Preamp: Three-Stage Cascaded Architecture
Drive Sections: Two
Reverb: None
Effects Loop: Tube Buffered
Condition: Excellent
Originality: All Original
Country: USA

AUTHENTICATION RATING

AUTHENTICITY: ★★★★★
ORIGINALITY: ★★★★★
CONDITION: ★★★★★
COLLECTIBILITY: ★★★★★
TECHNICAL SIGNIFICANCE: ★★★★★

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12. BLUE NOTE MUSIC CERTIFICATION STATEMENT

Blue Note Music certifies that, based upon the physical inspection information supplied and comparison with documented RedPlate factory specifications and historical documentation, this amplifier is consistent with an authentic RedPlate Cosmic Dust amplifier head.

The amplifier exhibits the expected architecture, control configuration, tube complement, construction methodology, and functional characteristics associated with the Cosmic Dust model.

The amplifier is additionally classified as ALL ORIGINAL and EXCELLENT CONDITION, with no modifications or non-factory alterations identified during the reported inspection.

This report represents Blue Note Music's professional inspection and authentication opinion based upon the evidence available at the time of examination. It is not a manufacturer's warranty, factory-issued certificate, or guarantee of undocumented ownership history.

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BLUE NOTE MUSIC

Vintage Instrument & Amplifier Authentication Department
1 East Allen Street
Wentzville, Missouri 63385
636-856-1080

Blue Note Certified

Where expertise, documentation, and preservation matter.

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REFERENCE BASIS

RedPlate Amps manufacturer documentation identifies Cosmic Dust as a discontinued model and describes RedPlate's hand-wired, eyelet-board construction philosophy. Historical and secondary-market documentation was additionally reviewed to verify Cosmic Dust-specific operating characteristics and specifications. (Redplate Amps)

Report Classification: Authentication & Originality Assessment
Condition Classification: A — Excellent
Originality Classification: All Original
Authentication Classification: AUTHENTIC