Frenzel RD-47 Tube Mic Preamp

This Frenzel RD-47 has been used only twice in a home studio setting and it functions perfectly. This Preamp is no longer in production. There's a few light marks on top of the casing from rack install/uninstall. Includes original power cable.

Here's Frenzels' description:

"The FRENZEL RD-47 microphone tube preamp is part of our "INSPIRED" line of products. It was inspired by the classic vintage 1959 EMI REDD47 microphone tube preamp that was used by the Beatles to record their early albums at the Abbey Road Studio in London, England...but the RD-47 is not a clone. Control features were added that were not available on the original preamp to provide more tone and level control. Exceptional clear warm tones produced by a classic ECC83 voltage amplifier driving a ECC83 dual triode output with rock solid level control enhanced by power supply voltage regulation.

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Standard Features:

Balanced XLR Input & Output Jacks isolated from chassis to eliminate eddy currents and hum.

DC on filaments to eliminate 60 hz hum.

Star ground system to eliminate induced current chassis noise.

Rumble filter

Polarity switch

DB calibrated Boost level switch

DB calibrated Gain control

Preamp tubes are ECC83 known for low noise and linearity

Regulated power supply

Classic Knobs and Toggle Power Switch

Standard IEC plug-in three prong grounded power cord.

Rock solid point-to-point hand wiring using only the best of parts...low noise tubular polypropylenes caps, metal film resistors, Micalex sockets, Neutrik jacks...etc.

2U Rackmount Chassis

Weight - 10 lbs.

Dimensions - 19"W x 10"D x 3.5"H

Tubes: 2 - ECC83

FRONT PANEL:

FINE GAIN CONTROL

VOLTAGE DB LEVEL SWITCH

POLARITY SWITCH

RUMBLE FILTER SWITCH

PILOT LIGHT

POWER SWITCH

REAR PANEL:

POWER CORD

FUSE

BALANCED XLR LOW IMPEDANCE OUTPUT

BALANCED XLR LOW IMPEDANCE INPUT

Specifications:

Input Impedance: Balanced XLR 600 ohms

Output Impedance: Balanced XLR 600 ohms

Sensitivity: 5 mv

Voltage Boost: Selectable 34 db – 40 db - 46 db

Frequency Response: 30 -15,000 hz

Gain Control Range: -20 db to 0 db for each Boost Level

Polarity Control: Normal – Reverse

Rumble Filter: On – Off

Voltage Amplifier: ECC83

Output Driver: ECC83

High Voltage Regulated: High Stability and Accuracy

Input/Output Transformers: Balanced and Shielded For Ultra Low Noise

Power: 120 VAC (Upgrades available for 100 – 240 VAC operation outside USA)

Chassis: Custom 2U Ventilated Rack Mount Chassis"