• Heritage Audio '73 JR 73JR Mic Pre 500-Series Module HA73JR

Heritage Audio '73 Junior Microphone Preamp


'73 JR OVERVIEW

 

The mic pre you've been dreaming about, at a price you never imagined possible.

The '73 Jr is a chip off the old block, raised on Carnhill transformers and hand wired with care, it delivers the same massive tone as the 1073-500, in single 500 series space.

 

'73 JR FEATURES

 

- 80dB Class A Microphone preamplifier, HI-LO selectable minimum input impedance, balanced and floating. High gain positions show a higher impedance, ideal for old ribbon mics.

- 50Db Class A Line preamplifier, bridging input impedance, balanced and floating.

- All discrete Class A Ultra High Impedance J-Fet Direct Input on a high quality Neutrik Jack. The DI circuit is ahead of the Mic Input transformer, so the transformer is ON when in DI mode. DI is automatically switched on when inserting a jack.

- Class A single ended, 2N3055 driven, high headroom output stage.

- PAD: 20dB Mic input attenuation ahead of the input transformer to avoid overloading it.

- HI PASS FILTER: Active all discrete Class A 3rd order Bessel, 80Hz Hi Pass Filter. 18dB/octave slope.

- OUTPUT control to allow overloading of the preamp.

- Internal slow turn-on +24v power supply for lower inrush current, which improves your lunchbox performance.

- Carnhill Input and Output transformers.

- 3 gain stage, genuine  modular card construction. All active circuitry is on pluggable cards for easier service.

- Marconi style knobs and vintage style engraved pushbuttons.

 

'73 JR SPECIFICATIONS

 

- Microphone input impedance: HI, 1200 Ohm minimum, LO, 300 Ohm minimum. Higher gain positions gradually have greater impedances, optimum for lo gain ribbon mics. Input is Carnhill transformer balanced and floating.

- Line input impedance: 10K Ohms bridging, Carnhill transformer balanced and floating.

- DI input impedance: Greater than 2 Megohms, unbalanced.

- Output impedance: Less than 75 Ohms, Carnhill transformer balanced and floating, to drive a load of 600 ohms (factory terminated).

- Maximum output: Greater than +26dBm into 600 ohms.

- THD: Less than 0.025% at 1 Khz, less than 0.05% at 100Hz.

- Frequency response: 20Hz ( +0.3dB ) to 20Khz (-0.2dB)

- Maximum gain: Slightly greater than 80dB

- Noise: Less than -100dBm.

- Power consumption: 88 mA per rail @+-16VDC.

Write a review

Note: HTML is not translated!
    Bad           Good

Heritage Audio '73 JR 73JR Mic Pre 500-Series Module HA73JR

  • Brand: Heritage Audio
  • Product Code: Heritage Audio '73 JR 73JR Mic Pre 500-Series Module HA73JR
  • Availability: In Stock
  • $899.00

  • Ex Tax: $899.00

Tags: Heritage Audio '73 JR 73JR Mic Pre 500-Series Module HA73JR